Expansion molds and processing equipment

Abstract

The present invention discloses an expansion mold and processing equipment. The expansion mold includes a mold body and an adjustment structure. The mold body is provided with an expansion cavity and an air leakage channel and an inlet connected to the expansion cavity. The adjustment structure includes a die nozzle assembly and an adjustment cap located at the inlet. The die nozzle assembly is provided with a passage connected to the inlet and an air permeable channel connected to the air leakage channel. The air permeable channel is connected to the passage. The adjustment cap is movably mounted on an end of the die nozzle assembly away from the inlet to seal or open the air permeable channel. The adjustment cap has an inlet corresponding to the passage. The adjustment cap is movable relative to the die nozzle assembly to form a gap connecting the inlet and the air permeable channel between the adjustment cap and the die nozzle assembly. The expansion mold provided by the present invention not only effectively prevents heat shrink tubing from adhering to the wall when entering the expansion mold, but also prevents axial tensile fluctuations caused by the heat shrink tubing adhering to the wall, thereby improving the production stability and finished product quality of the heat shrink tubing.

Description

Technical Field

[0001] The present invention relates to the technical field of heat shrink tube production equipment, in particular to an expansion mold and processing equipment using the expansion mold. Background Art

[0002] In the related art, when the heat shrink tube is expanded and produced, it is very easy to produce axial stretching due to the heat shrink tube's easy adhesion to the wall and the friction resistance between the heat shrink tube and the inner wall of the mold. This phenomenon occurs at the die nozzle and when it enters the mold core. Since the heat shrink tube is in the mold position at this stage, the heat shrink tube is still in an expanded and deformed state and has not been shaped. At this time, it is very easy to produce poor axial stretching, affecting the stability of the heat shrink tube expansion production and the quality of the heat shrink tube. Summary of the Invention

[0003] The main purpose of the present invention is to provide an expansion mold and processing equipment, aiming to provide an expansion mold that effectively prevents the heat shrink tube from sticking to the wall during expansion production. The expansion mold not only effectively prevents the heat shrink tube from sticking to the wall when entering the expansion mold, but also avoids the axial stretching fluctuations of the heat shrink tube caused by sticking to the wall, thereby improving the production stability and finished product quality of the heat shrink tube.

[0004] To achieve the above object, the present invention provides an expansion mold, which includes:

[0005] A mold body, wherein the mold body is provided with an expansion cavity and an air leakage channel and an inlet communicating with the expansion cavity; and

[0006] An adjustment structure, comprising a die nozzle assembly and an adjustment cap disposed at the inlet, the die nozzle assembly being provided with a passage communicating with the inlet and a vent passage communicating with the air leakage passage, the vent passage being communicated with the passage, the adjustment cap being movably sleeved on an end of the die nozzle assembly away from the inlet to seal or open the vent passage, the adjustment cap being provided with an inlet corresponding to the passage;

[0007] The adjusting cap is movable relative to the die nozzle assembly so that a gap is formed between the adjusting cap and the die nozzle assembly to communicate with the inlet and the air permeable channel.

[0008] In one embodiment, the die nozzle assembly comprises:

[0009] A pressure-stabilizing die nozzle, the pressure-stabilizing die nozzle being provided at the inlet, the pressure-stabilizing die nozzle being provided with a first passage communicating with the inlet and a first air permeable passage communicating with the air leakage passage, the first air permeable passage being in communication with the first passage; and

[0010] An air leakage nozzle is provided at an end of the pressure stabilizing die nozzle away from the inlet, the air leakage nozzle is provided with a second passage connected to the first passage and a second air permeable passage connected to the first air permeable passage, and the second air permeable passage is spaced apart from the second passage;

[0011] The first passage and the second passage cooperate to form the passage, and the first air permeable channel and the second air permeable channel cooperate to form the air permeable channel; the adjustment cap is movably connected to the air leakage nozzle and / or the pressure stabilizing die nozzle.

[0012] In one embodiment, a mounting groove is provided at one end of the pressure stabilizing die away from the inlet, an outer wall of the mounting groove is provided with an external thread, the first passage and the first air vent pass through the bottom wall of the mounting groove, and the air leakage nozzle is provided in the mounting groove;

[0013] The adjusting cap is provided with an internal thread, and the adjusting cap is screwed to the pressure stabilizing die nozzle through the cooperation of the internal thread and the external thread;

[0014] Wherein, the adjusting cap rotates relative to the pressure stabilizing die nozzle to adjust the size of the gap.

[0015] In one embodiment, the pressure stabilizing die nozzle is provided with a plurality of the first air permeable channels, the plurality of the first air permeable channels are arranged at intervals and surround the first passage, and each of the first air permeable channels is connected to the first passage through a first connecting groove;

[0016] The air leakage nozzle is provided with a plurality of second air permeable channels, the plurality of second air permeable channels are arranged at intervals and surround the second passage, and each second air permeable channel corresponds to and is connected to a first air permeable channel;

[0017] The mold body is provided with a plurality of the air leakage channels, which are arranged around the expansion cavity. Each of the air leakage channels is connected to the expansion cavity through a second connecting groove, and each of the air leakage channels corresponds to and is connected to one of the first air permeable channels.

[0018] In one embodiment, the second passage, the first passage, and the expansion cavity are coaxially arranged;

[0019] And / or, the second air permeable channel, the first air permeable channel and the air leakage channel are coaxially arranged;

[0020] And / or, the air leakage channel is arranged in parallel with the expansion cavity, the first air permeable channel is arranged in parallel with the first passage, and the second air permeable channel is arranged in parallel with the second passage;

[0021] And / or, the first passage is arranged to extend along the axial direction of the pressure stabilizing die nozzle, and the second passage is arranged to extend along the axial direction of the air leakage nozzle;

[0022] And / or, the first communicating groove is a through-hole structure or a through-groove structure;

[0023] And / or, the second communicating groove is a through hole structure or a through groove structure.

[0024] In one embodiment, the mold body comprises:

[0025] an expansion mold core, wherein the expansion mold core is provided with the expansion cavity, the air leakage channel, the inlet and the outlet, the inlet and the outlet are connected to the expansion cavity and are located at both ends of the expansion cavity, the expansion mold core is further provided with a plurality of air extraction holes connected to the expansion cavity, and the plurality of air extraction holes are staggered with the air leakage channel; and

[0026] The first vacuum sleeve is arranged on the outer wall of the expansion mold core and is enclosed with the expansion mold core to form a first vacuum cavity. The first vacuum cavity is connected to the expansion cavity through multiple exhaust holes. The first vacuum sleeve is provided with a first exhaust port connected to the first vacuum cavity.

[0027] In one embodiment, a limiting groove is provided at one end of the expansion mold core adjacent to the inlet, the expansion cavity and the air leakage channel are arranged through the bottom wall of the limiting groove, and the end of the nozzle assembly away from the adjustment cap is arranged in the limiting groove.

[0028] In one embodiment, the mold body further includes:

[0029] A cooling mold core is provided at the outlet, and the cooling mold core is provided with a cooling channel connected to the outlet and a plurality of through holes connected to the cooling channel;

[0030] a cooling jacket, the cooling jacket being sleeved on the outer wall of the cooling mold core and connected to the first vacuum jacket, the cooling jacket and the cooling mold core enclosing a cooling cavity communicating with the through hole, the cooling jacket being provided with a water inlet communicating with the cooling cavity; and

[0031] The second vacuum sleeve is arranged on the outer wall of the cooling mold core and is connected to the end of the cooling sleeve away from the first vacuum sleeve. The second vacuum sleeve and the cooling mold core enclose a second vacuum cavity connected to the through hole. The second vacuum sleeve is provided with a second vacuum port connected to the second vacuum cavity.

[0032] In one embodiment, the expansion cavity is provided extending along the axial direction of the expansion mold core;

[0033] And / or, the plurality of air extraction holes are arranged at intervals along the extension direction of the expansion cavity;

[0034] And / or, the first air extraction port includes a plurality of ports, and the plurality of first air extraction ports are arranged at intervals along the circumference of the first vacuum jacket;

[0035] And / or, the cooling channel is arranged to extend along the axial direction of the cooling mold core;

[0036] And / or, the plurality of through holes are arranged at intervals along the extension direction of the cooling channel;

[0037] And / or, the second air extraction port includes a plurality of ports, and the plurality of second air extraction ports are arranged at intervals along the circumference of the second vacuum jacket.

[0038] The present invention further provides a processing device, comprising a device body and the above-mentioned expansion mold, wherein the expansion mold is arranged on the device body.

[0039] The expansion mold of the technical solution of the present invention is provided with an adjustment structure at the inlet of the mold body, and a connected expansion cavity and air leakage channel are provided in the mold body, and aisles and air permeable channels are respectively provided on the die nozzle assembly corresponding to the expansion cavity and the air leakage channel, and the air permeable channel is connected to the aisle, so that the adjustment cap is movably sleeved on the end of the die nozzle assembly away from the inlet to seal or open the air permeable channel. In this way, the adjustment cap can be used to move relative to the die nozzle assembly to adjust the gap between the adjustment cap and the die nozzle assembly that connects the inlet and the air permeable channel, so that the gas enters the aisle and the expansion cavity respectively through the inlet, the gap, the air permeable channel and the air leakage channel in turn, thereby forming a layer of annular air film on the inner wall of the aisle and the expansion cavity. In this way, the annular air film can be used to greatly reduce the dynamic friction resistance between the heat shrinkable tube and the inner wall of the aisle and the expansion cavity to avoid stretching; at the same time, by adjusting the adjustment cap to control the leakage amount of the air permeable channel and the air leakage channel, the external pressure of the heat shrinkable tube after entering the aisle and the expansion cavity can also be stabilized, thereby improving the expansion stability of the heat shrinkable tube. The expansion mold proposed in the present invention not only effectively prevents the heat shrink tube from sticking to the wall when entering the expansion mold, but also avoids axial stretching fluctuations of the heat shrink tube caused by sticking to the wall, thereby improving the production stability and finished product quality of the heat shrink tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0041] Figure 1is a cross-sectional schematic diagram of an expansion mold in one embodiment of the present invention;

[0042] Figure 2 A cross-sectional schematic diagram of the connection between the adjustment structure and the expansion mold core in one embodiment of the present invention;

[0043] Figure 3 A cross-sectional schematic diagram of an adjustment structure in one embodiment of the present invention;

[0044] Figure 4 This is a schematic structural diagram of a pressure-stabilizing die nozzle in one embodiment of the present invention;

[0045] Figure 5 A schematic structural diagram of a pressure-stabilizing die nozzle from another perspective in one embodiment of the present invention;

[0046] Figure 6 for Figure 5 Schematic diagram of the cross section along the AA direction;

[0047] Figure 7 This is a schematic structural diagram of an air leakage nozzle in one embodiment of the present invention;

[0048] Figure 8 A schematic cross-sectional view of an air leakage nozzle according to an embodiment of the present invention;

[0049] Figure 9 A schematic structural diagram of an expansion mold core according to an embodiment of the present invention;

[0050] Figure 10 A schematic structural diagram of an expansion mold core from another perspective in one embodiment of the present invention;

[0051] Figure 11 for Figure 10 Schematic diagram of the cross section along the BB direction.

[0052] Description of Figure Numbers:

[0053] Label name Label name 100 Expansion mold 15 Second vacuum jacket 1 Mold body 151 Second vacuum chamber 11 Expansion core 152 Second exhaust port 111 expansion cavity 2 Regulatory structure 112 Leakage channel 21 Die nozzle assembly 113 Second communicating groove 21a aisle 114 import 21b Breathing channels 115 exit 211 Pressure stabilizing die nozzle 116 exhaust hole 2111 First Aisle 117 Limit slot 2112 First ventilation channel 12 First vacuum jacket 2113 First communicating groove 121 The first vacuum chamber 2114 Mounting slot 122 First air outlet 212 Leaking nozzle 13 Cooling core 2121 Second aisle 131 Cooling channels 2122 Second ventilation channel 132 through-hole 22 Adjustment cap 14 Cooling jacket 221 Entrance 141 Cooling chamber 222 gap 142 water inlet

[0054] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0056] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0057] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0058] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0059] In the related art, when the heat shrink tube is expanded and produced, when it passes through the mold inlet and enters the expansion mold, the heat shrink tube and the inner wall of the mold inlet are easily attached to the wall, thereby increasing the friction resistance between the heat shrink tube and the inner wall of the mold, which makes the heat shrink tube very easy to produce axial stretching. This phenomenon occurs at the die nozzle and when it enters the inner core of the mold. Since the heat shrink tube is in the mold position at this stage, the heat shrink tube is still in an expanded and deformed state and has not been fixed. At this time, it is very easy to produce poor axial stretching, affecting the stability of the heat shrink tube expansion production and the quality of the heat shrink tube.

[0060] Based on the above concepts and problems, the present invention proposes an expansion mold 100. As can be understood, the expansion mold 100 is used for the expansion production of heat shrink tubing. In this embodiment, the expansion mold 100 is applied to a processing equipment, which is used for the processing and production of heat shrink tubing.

[0061] Please refer to Figures 1 to 11As shown, in an embodiment of the present invention, the expansion mold 100 includes a mold body 1 and an adjustment structure 2, wherein the mold body 1 is provided with an expansion cavity 111 and an air leakage channel 112 and an inlet 114 connected to the expansion cavity 111; the adjustment structure 2 includes a nozzle assembly 21 and an adjustment cap 22 provided at the inlet 114, the nozzle assembly 21 is provided with a passage 21a connected to the inlet 114 and an air permeable channel 21b connected to the air leakage channel 112, the air permeable channel 21b is connected to the passage 21a, the adjustment cap 22 is movably sleeved on an end of the nozzle assembly 21 away from the inlet 114 to seal or open the air permeable channel 21b, and the adjustment cap 22 is provided with an inlet 221 corresponding to the passage 21a; wherein the adjustment cap 22 can be movable relative to the nozzle assembly 21 so that a gap 222 connecting the inlet 221 and the air permeable channel 21b is formed between the adjustment cap 22 and the nozzle assembly 21.

[0062] In this embodiment, the mold body 1 is the main structure of the expansion mold 100, and the mold body 1 is used to expand the heat shrink tube. It can be understood that after the heat shrink tube enters the expansion cavity 111 through the inlet 114 to achieve the expansion process, it enters the next processing step or process.

[0063] In order to avoid the heat shrink tube from adhering to the inner wall of the expansion cavity 111 at the inlet 114 when entering the inlet 114, thereby causing the heat shrink tube to adhere to the wall, the friction resistance of the heat shrink tube at the inlet 114 will suddenly change, and the axial stretching will increase accordingly, thereby affecting the stability of the heat shrink tube expansion production and the quality of the heat shrink tube. In this embodiment, the mold body 1 is further provided with an air leakage channel 112 communicating with the expansion cavity 111, and an adjustment structure 2 is provided at the inlet 114 of the mold body 1, so that the die nozzle assembly 21 of the adjustment structure 2 is provided at the inlet 114, and is provided with a passage 21a communicating with the inlet 114 and a vent passage 21b communicating with the air leakage channel 112, and the vent passage 21b is communicated with the passage 21a, and the adjustment cap 22 is movably sleeved on the end of the die nozzle assembly 21 away from the inlet 114 to cover or open the vent passage 21b, so that the adjustment cap 22 is movable relative to the die nozzle assembly 21, so that a gap 222 communicating with the inlet 221 and the vent passage 21b is formed between the adjustment cap 22 and the die nozzle assembly 21, and then by adjusting the adjustment cap 22 relative to the die nozzle assembly 21 The die nozzle assembly 21 moves to adjust the size of the gap 222, thereby controlling the gas entering the air permeable channel 21b and the leakage channel 112 through the inlet 221 and the gap 222, so that the gas enters the channel 21a and the expansion cavity 111 through the air permeable channel 21b and the leakage channel 112 respectively, so that the gas forms an annular air film on the inner walls of the channel 21a and the expansion cavity 111. In this way, the annular air film can be used to greatly reduce the dynamic friction resistance between the heat shrink tube and the inner walls of the channel 21a and the expansion cavity 111, thereby avoiding stretching; at the same time, by adjusting the adjustment cap 22 to control the leakage amount of the air permeable channel 21b and the leakage channel 112, the external pressure of the heat shrink tube after entering the channel 21a and the expansion cavity 111 can also be stabilized, thereby improving the expansion stability of the heat shrink tube.

[0064] The expansion mold 100 of the present invention is provided with an adjustment structure 2 at the inlet 114 of the mold body 1, and a connected expansion cavity 111 and a leakage channel 112 are provided in the mold body 1. A passage 21a and a vent channel 21b are provided on the die nozzle assembly 21 corresponding to the expansion cavity 111 and the leakage channel 112, respectively, and the vent channel 21b is connected to the passage 21a, so that the adjustment cap 22 is movably mounted on the end of the die nozzle assembly 21 away from the inlet 114 to cover or open the vent channel 21b. In this way, the adjustment cap 22 can be used to move relative to the die nozzle assembly 21 to adjust the communication inlet 221 formed between the adjustment cap 22 and the die nozzle assembly 21. The gap 222 of the air permeable channel 21b allows gas to enter the channel 21a and the expansion chamber 111 respectively through the inlet 221, the gap 222, the air permeable channel 21b, and the leakage channel 112, thereby forming an annular air film on the inner walls of the channel 21a and the expansion chamber 111. This annular air film can be used to significantly reduce the dynamic friction resistance between the heat shrink tube and the inner walls of the channel 21a and the expansion chamber 111, thereby avoiding stretching. At the same time, by adjusting the regulating cap 22 to control the leakage rate of the air permeable channel 21b and the leakage channel 112, the external pressure of the heat shrink tube after entering the channel 21a and the expansion chamber 111 can also be stabilized, thereby improving the expansion stability of the heat shrink tube. The expansion mold 100 proposed by the present invention not only effectively prevents the heat shrink tube from adhering to the wall when entering the expansion mold, but also avoids the axial stretch fluctuation of the heat shrink tube caused by adhering to the wall, thereby improving the production stability and finished product quality of the heat shrink tube.

[0065] In one embodiment, if Figures 1 to 8 As shown, the die nozzle assembly 21 includes a pressure stabilizing die nozzle 211 and a gas leakage nozzle 212, wherein the pressure stabilizing die nozzle 211 is arranged at the inlet 114, the pressure stabilizing die nozzle 211 is provided with a first passage 2111 communicating with the inlet 114 and a first air permeable channel 2112 communicating with the gas leakage channel 112, the first air permeable channel 2112 is communicated with the first passage 2111; the gas leakage nozzle 212 is arranged at one end of the pressure stabilizing die nozzle 211 away from the inlet 114, the gas leakage nozzle 212 is provided with a first passage 2111 communicating with the inlet 114 and a first air permeable channel 2112 communicating with the gas leakage channel 112, the first air permeable channel 2112 is communicated with the first passage 2111; The second air passage 2121 of the passage 2111 and the second air passage 2122 connected to the first air passage 2112, the second air passage 2122 and the second air passage 2121 are spaced apart; wherein, the first passage 2111 and the second passage 2121 cooperate to form the passage 21a, and the first air passage 2112 and the second air passage 2122 cooperate to form the air passage 21b; the adjusting cap 22 is movably connected to the air leakage nozzle 212 and / or the pressure stabilizing die nozzle 211.

[0066] In this embodiment, the pressure-stabilizing die nozzle 211 is disposed at the inlet 114 of the mold body 1, thereby utilizing the pressure-stabilizing die nozzle 211 to smoothly guide the heat shrink tubing to the inlet 114 of the mold body 1 and into the expansion cavity 111 for expansion processing. It is understood that the pressure-stabilizing die nozzle 211 is provided with a first passage 2111 and a first air permeable passage 2112 corresponding to the inlet 114 and the air leakage passage 112, respectively, and the first air permeable passage 2112 is connected to the first passage 2111. Thus, the first air permeable passage 2112 can be used to both allow gas to flow into the first passage 2111 and form an annular air film on the inner wall surface of the first passage 2111. This annular air film can be utilized to prevent the heat shrink tubing from adhering to the inner wall of the first passage 2111 before entering the inlet 114. At the same time, gas is introduced into the leakage channel 112 through the first air permeable channel 2112, so that the gas enters the expansion cavity 111 through the leakage channel 112, thereby forming an annular air film on the inner wall surface of the expansion cavity 111. The annular air film can be used to prevent the heat shrink tube from entering the expansion cavity 111 and adhering to the inner wall of the expansion cavity 111.

[0067] It can be understood that by providing an air leakage nozzle 212 at the end of the pressure-stabilizing die 211 away from the inlet 114, the air leakage nozzle 212 and the adjustment cap 22 are used to achieve gas conduction and transmission. In this embodiment, the air leakage nozzle 212 is provided with a second passage 2121 and a second air permeable channel 2122 corresponding to the first passage 2111 and the first air permeable channel 2112, so that the second passage 2121 corresponds to and is connected with the first passage 2111, and cooperates to form a passage 21a, and the second air permeable channel 2122 corresponds to and is connected with the first air permeable channel 2112, and cooperates to form an air permeable channel 21b. In this way, when the adjustment cap 22 moves relative to the die assembly 21, the adjustment cap 22 and the air leakage nozzle 212 at the end away from the pressure-stabilizing die 211 are formed to communicate with the inlet 221 and the first air permeable channel 2112. The gap 222 of the second air permeable channel 2122 facilitates the gas to enter the first air permeable channel 2112 and the leakage channel 112 through the inlet 221, the gap 222, and the second air permeable channel 2122, so that the gas in the first air permeable channel 2112 and the leakage channel 112 enters the first channel 2111 and the expansion cavity 111, thereby forming an annular air film on the inner wall surface of the first channel 2111 and the expansion cavity 111, so as to utilize the annular air film to prevent the heat shrink tube from entering the first channel 2111 and the expansion cavity 111 and adhering to the inner wall of the first channel 2111 and the expansion cavity 111.

[0068] Optionally, the pressure-stabilizing die nozzle 211 is a cylindrical structure with openings at both ends, and the air leakage nozzle 212 is a cylindrical structure with openings at both ends. The first passage 2111 and the first air permeable passage 2112 both extend along the axial direction or length of the pressure-stabilizing die nozzle 211. The second passage 2121 and the second air permeable passage 2122 both extend along the axial direction or length of the air leakage nozzle 212.

[0069] In one embodiment, if Figures 1 to 6 As shown, a mounting groove 2114 is provided at one end of the pressure-stabilizing die 211 away from the inlet 114, and an outer wall of the mounting groove 2114 is provided with an external thread. The first passage 2111 and the first air vent 2112 pass through the bottom wall of the mounting groove 2114, and the air leakage nozzle 212 is arranged in the mounting groove 2114; the adjusting cap 22 is provided with an internal thread, and the adjusting cap 22 is screwed to the pressure-stabilizing die 211 through the cooperation of the internal thread and the external thread; wherein, the adjusting cap 22 rotates relative to the pressure-stabilizing die 211 to adjust the size of the gap 222.

[0070] In this embodiment, a mounting groove 2114 is provided at the end of the pressure-stabilizing die 211 away from the inlet 114, thereby facilitating the use of the mounting groove 2114 to achieve position-limited installation of the air leakage nozzle 212. It will be appreciated that the first passage 2111 and the first air permeable passage 2112 extend through the bottom wall of the mounting groove 2114. Thus, when the air leakage nozzle 212 is installed in the mounting groove 2114, the second passage 2121 and the second air permeable passage 2122 correspond to and communicate with the first passage 2111 and the first air permeable passage 2112, respectively.

[0071] It is understood that the adjustment cap 22 can be optionally configured as a cover or cap structure, and by providing an internal thread on the inner wall of the adjustment cap 22 and providing an external thread on the end of the pressure-stabilizing die 211 away from the inlet 114, the adjustment cap 22 can be conveniently screwed to the pressure-stabilizing die 211 through the cooperation of the internal and external threads, so as to achieve a rotational connection between the adjustment cap 22 and the pressure-stabilizing die 211, thereby adjusting the size of the gap 222 between the adjustment cap 22 and the air leakage nozzle 212 by rotating the adjustment cap 22. Optionally, the first passage 2111 is provided along the axial extension of the pressure-stabilizing die 211, and the second passage 2121 is provided along the axial extension of the air leakage nozzle 212.

[0072] Optionally, a sealing structure is provided between the air leakage nozzle 212 and the groove wall of the installation groove 2114 to ensure the sealing performance of the connection between the second passage 2121 and the first passage 2111.

[0073] In one embodiment, if Figures 1 to 11As shown, the pressure-stabilizing die nozzle 211 is provided with a plurality of first air permeable channels 2112, which are spaced apart and arranged around the first passage 2111, and each first air permeable channel 2112 is connected to the first passage 2111 through a first connecting groove 2113; the leakage nozzle 212 is provided with a plurality of second air permeable channels 2122, which are spaced apart and arranged around the second passage 2121, and each second air permeable channel 2122 corresponds to and is connected to a first air permeable channel 2112; the mold body 1 is provided with a plurality of air leakage channels 112, which are spaced apart and arranged around the expansion cavity 111, and each air leakage channel 112 is connected to the expansion cavity 111 through a second connecting groove 113, and each air leakage channel 112 corresponds to and is connected to a first air permeable channel 2112.

[0074] In this embodiment, multiple first air permeable channels 2112 are provided on the pressure-stabilizing die nozzle 211, multiple second air permeable channels 2122 are provided on the air leakage nozzle 212, and multiple air leakage channels 112 are provided on the mold body 1, so that each second air permeable channel 2122 is correspondingly connected to a first air permeable channel 2112, and the first air permeable channel 2112 is correspondingly connected to a air leakage channel 112.

[0075] It can be understood that multiple first air permeable channels 2112 are arranged around the first channel 2111, so that the multiple first air permeable channels 2112 can be connected to the first channel 2111 through the first connecting groove 2113 respectively, thereby ensuring that the gas enters the first channel 2111 through the multiple first air permeable channels 2112 through the first connecting groove 2113 respectively, so as to ensure that a circumferentially uniform annular air film is formed on the inner wall of the first channel 2111, which can effectively prevent the heat shrink tube from adhering to the inner wall of the first channel 2111.

[0076] In this embodiment, multiple leakage channels 112 are arranged around the expansion chamber 111, so that the multiple leakage channels 112 can be connected to the expansion chamber 111 through the second connecting groove 113 respectively, thereby ensuring that the gas enters the expansion chamber 111 through the multiple leakage channels 112 through the second connecting groove 113 respectively, so as to ensure that a circumferentially uniform annular air film is formed on the inner wall of the expansion chamber 111, which can effectively avoid the heat shrink tube from adhering to the inner wall of the expansion chamber 111.

[0077] In one embodiment, if Figure 1 and Figure 2 As shown, the second passage 2121, the first passage 2111, and the expansion chamber 111 are coaxially arranged. It is understood that this arrangement allows the extension directions of the second passage 2121, the first passage 2111, and the expansion chamber 111 to be aligned in a straight line, thereby preventing the heat shrink tubing from bending during the expansion process, which would affect the expansion process of the heat shrink tubing, thereby improving the processing quality and efficiency of the heat shrink tubing.

[0078] In one embodiment, if Figures 1 to 3 As shown, the second air permeable channel 2122, the first air permeable channel 2112, and the leakage channel 112 are coaxially arranged. As will be appreciated, this arrangement improves gas transfer efficiency. Optionally, the leakage channel 112 is arranged parallel to the expansion chamber 111, the first air permeable channel 2112 is arranged parallel to the first passage 2111, and the second air permeable channel 2122 is arranged parallel to the second passage 2121.

[0079] In one embodiment, if Figures 1 to 11 As shown, the first communicating groove 2113 may be a through hole structure or a through groove structure.

[0080] It will be appreciated that when the first communicating groove 2113 is a through-hole structure, the first communicating groove 2113 includes a plurality of first communicating grooves 2113, and the plurality of first communicating grooves 2113 are spaced apart along the extension direction of each first air permeable channel 2112 and the first passage 2111, thereby ensuring that the gas within the first air permeable channel 2112 is evenly transferred to the first passage 2111, thereby forming a uniform annular air film on the inner wall of the first passage 2111. When the first communicating groove 2113 is a through-slot structure, the opening size of the first communicating groove 2113 is smaller than the aperture of each first air permeable channel 2112 and the first passage 2111, that is, the first communicating groove 2113 is a slit structure and extends along the extension direction of each first air permeable channel 2112 and the first passage 2111, which is not limited here.

[0081] In one embodiment, if Figures 1 to 11 As shown, the second communicating groove 113 may be a through hole structure or a through groove structure.

[0082] It will be appreciated that when the second communicating groove 113 is a through-hole structure, the second communicating groove 113 includes a plurality of second communicating grooves 113, and the plurality of second communicating grooves 113 are spaced apart along the extension direction of each leakage channel 112 and expansion cavity 111, thereby ensuring that the gas within the leakage channel 112 is evenly transferred to the expansion cavity 111, thereby forming a uniform annular air film on the inner wall of the expansion cavity 111. When the second communicating groove 113 is a through-slot structure, the opening size of the second communicating groove 113 is smaller than the aperture of each leakage channel 112 and expansion cavity 111, that is, the second communicating groove 113 is a slit structure and extends along the extension direction of each leakage channel 112 and expansion cavity 111, which is not limited here.

[0083] In one embodiment, if Figure 1 、 Figure 2 、 Figures 9 to 11As shown, the mold body 1 includes an expansion mold core 11 and a first vacuum sleeve 12, wherein the expansion mold core 11 is provided with an expansion cavity 111, an air leakage channel 112, an inlet 114 and an outlet 115, the inlet 114 and the outlet 115 are connected to the expansion cavity 111, and are located at both ends of the expansion cavity 111, the expansion mold core 11 is also provided with a plurality of exhaust holes 116 connected to the expansion cavity 111, and the plurality of exhaust holes 116 are staggered with the air leakage channel 112; the first vacuum sleeve 12 is sleeved on the outer wall of the expansion mold core 11, and is enclosed with the expansion mold core 11 to form a first vacuum cavity 121, the first vacuum cavity 121 is connected to the expansion cavity 111 through a plurality of exhaust holes 116, and the first vacuum sleeve 12 is provided with a first exhaust port 122 connected to the first vacuum cavity 121.

[0084] In this embodiment, the expansion mold core 11 is a cylindrical tube-shaped structure having an expansion cavity 111, and the first vacuum sleeve 12 is arranged on the outside of the expansion mold core 11, that is, the expansion mold core 11 is arranged in the first vacuum sleeve 12 and passes through the first vacuum sleeve 12, so that the two ends of the first vacuum sleeve 12 are sealedly connected to the outer wall of the expansion mold core 11, so that the first vacuum sleeve 12 and the expansion mold core 11 enclose a first vacuum cavity 121.

[0085] It can be understood that by setting a first vacuum port 122 connected to the first vacuum chamber 121 on the first vacuum sleeve 12, and setting a plurality of vacuum holes 116 connected to the expansion chamber 111 and the first vacuum chamber 121 on the expansion core 11, when the heat shrink tube enters the expansion chamber 111, the first vacuum sleeve 12 is connected to the external vacuum equipment through the first vacuum port 122, so as to vacuum the first vacuum chamber 121 through the first vacuum port 122, thereby forming a negative pressure environment in the first vacuum chamber 121. At this time, the negative pressure environment in the first vacuum chamber 121 expands the heat shrink tube in the expansion chamber 111 through the plurality of vacuum holes 116.

[0086] In this embodiment, the expansion mold core 11 is provided with an axial exhaust hole 116 along the axis. It is understood that by providing a connector at the first exhaust port 122 and connecting it to a vacuum line or vacuum pumping equipment via the connector, a vacuum is drawn through the first exhaust port 122 by the vacuum line or vacuum pumping equipment, thereby forming a negative pressure in the first vacuum chamber 121.

[0087] Alternatively, as Figure 1 、 Figure 3 、 Figure 11 As shown, the expansion cavity 111 is extended along the axial direction of the expansion mold core 11 .

[0088] In one embodiment, if Figure 1 、 Figure 2 、 Figures 9 to 11As shown, a limiting groove 117 is provided at one end of the expansion mold core 11 adjacent to the inlet 114 , the expansion cavity 111 and the air leakage channel 112 are arranged through the bottom wall of the limiting groove 117 , and the end of the nozzle assembly 21 away from the adjustment cap 22 is arranged in the limiting groove 117 .

[0089] In this embodiment, a retaining groove 117 is provided at one end of the expansion core mold 11 adjacent to the inlet 114. This retaining groove 117 allows for positional positioning of the pressure-stabilizing die 211 of the die assembly 21. As will be appreciated, a sealing structure is provided between the pressure-stabilizing die 211 and the wall of the retaining groove 117 to ensure a sealed connection between the first passage 2111 and the expansion cavity 111.

[0090] In one embodiment, if Figure 1 As shown, the mold body 1 also includes a cooling mold core 13, a cooling jacket 14 and a second vacuum jacket 15, wherein the cooling mold core 13 is arranged at the outlet 115, and the cooling mold core 13 is provided with a cooling channel 131 connected to the outlet 115 and a plurality of through holes 132 connected to the cooling channel 131; the cooling jacket 14 is sleeved on the outer wall of the cooling mold core 13 and is connected to the first vacuum jacket 12, the cooling jacket 14 and the cooling mold core 13 enclose a cooling cavity 141 connected to the through holes 132, and the cooling jacket 14 is provided with a water inlet 142 connected to the cooling cavity 141; the second vacuum jacket 15 is sleeved on the outer wall of the cooling mold core 13, and is connected to the end of the cooling jacket 14 away from the first vacuum jacket 12, the second vacuum jacket 15 and the cooling mold core 13 enclose a second vacuum cavity 151 connected to the through holes 132, and the second vacuum jacket 15 is provided with a second air extraction port 152 connected to the second vacuum cavity 151.

[0091] In this embodiment, the cooling mold core 13 is passed through the cooling sleeve 14 and the second vacuum sleeve 15, and is arranged to pass through the cooling sleeve 14 and the second vacuum sleeve 15, so that one end of the cooling mold core 13 passing through the cooling sleeve 14 is sealed and connected to the outlet 115 of the expansion mold core 11, so that the expansion cavity 111 of the expansion mold core 11 is connected with the cooling channel 131 of the cooling mold core 13, thereby ensuring that the heat shrink tube passing through the expansion cavity 111 smoothly enters the cooling channel 131 of the cooling mold core 13 for cooling and shaping.

[0092] It can be understood that one end of the cooling jacket 14 is sealed with the first vacuum jacket 12, and the other end of the cooling jacket 14 is sealed with the second vacuum jacket 15. In this embodiment, the cooling mold core 13 and the cooling jacket 14 enclose a cooling chamber 141, and the cooling mold core 13 and the second vacuum jacket 15 enclose a second vacuum chamber 151. The first vacuum chamber 121, the cooling chamber 141, and the second vacuum chamber 151 are arranged at intervals, so that cooling water of a certain pressure is introduced into the cooling chamber 141 through the water inlet 142 of the cooling jacket 14. The cooling water enters the cooling chamber 141 along the cooling chamber 141 through the through hole 132 on the cooling mold core 13. In this way, the cooling water can directly contact the heat shrink tube to cool the heat shrink tube.

[0093] In this embodiment, a connecting joint is provided on the second air exhaust port 152 of the second vacuum sleeve 15, and is connected to a vacuum pipeline or a vacuum pumping device through the connecting joint, so that a vacuum is drawn through the second air exhaust port 152 by the vacuum pipeline or the vacuum pumping device, so that a negative pressure is formed in the second vacuum chamber 151. Under the action of the negative pressure, the mixture of air and cooling water between the cooling mold core 13 and the outer wall of the heat shrink tube is extracted, so that the heat shrink tube can be expanded and cooled after expansion.

[0094] It can be understood that the first vacuum sleeve 12 is arranged adjacent to the adjustment structure 2, so that the first vacuum sleeve 12 is connected to the external vacuum pipeline through the connector, and the first vacuum chamber 121 is evacuated, thereby forming a negative pressure chamber in the first vacuum chamber 121, and the expansion chamber 111 of the expansion core 11 is evacuated through the radial exhaust holes 116 on the side wall of the expansion core 11, thereby expanding the heat shrink tube in the expansion chamber 111. Furthermore, through the cooling jacket 14 arranged at the end of the first vacuum jacket 12 away from the adjustment structure 2, cooling water of a certain pressure is introduced into the cooling cavity 141 through the water inlet 142. The cooling water enters the cooling channel 131 along the cooling cavity 141 through the through hole 132 on the cooling mold core 13, so as to cool and shape the heat shrinkable tube that has undergone expansion processing in the cooling channel 131. Under the negative pressure of the second vacuum chamber 151, the mixture of air and cooling water between the second vacuum chamber 151 of the cooling mold core 13 and the outer wall of the heat shrinkable tube is extracted, thereby realizing the cooling operation of the expanded heat shrinkable tube to ensure the shaping of the heat shrinkable tube after expansion processing.

[0095] In this embodiment, the cooling sleeve 14 is connected to the external cooling water pipeline through a connector, and cooling water is introduced. The cooling water enters the cooling channel 131 of the cooling mold core 13 along the radial through hole 132 set on the side wall of the cooling mold core 13. While cooling and shaping the heat shrink tube, it also acts as a lubricant to reduce the friction resistance between the heat shrink tube and the inner wall of the cooling mold core 13.

[0096] Optionally, the cooling channel 131 is provided to extend along the axial direction of the cooling core 13 .

[0097] In one embodiment, if Figure 1 、 Figure 2 、 Figure 9 and Figure 11 As shown, multiple air extraction holes 116 are spaced apart along the extension direction of the expansion cavity 111. It is understood that this arrangement ensures that the multiple air extraction holes 116 are arranged corresponding to the first vacuum jacket 12, so that the multiple air extraction holes 116 communicate with the first vacuum cavity 121 and the expansion cavity 111, thereby enabling the heat shrink tubing in the expansion cavity 111 to be uniformly expanded along its circumference.

[0098] In one embodiment, if Figure 1 As shown, the first air extraction ports 122 include a plurality of ports 122 that are spaced apart along the circumference of the first vacuum jacket 12. It is understood that this arrangement ensures that the negative pressure in the first vacuum chamber 121 surrounding the expansion chamber 111 is balanced, thereby ensuring uniform expansion of the heat shrink tube along the circumference.

[0099] In one embodiment, if Figure 1 As shown, multiple through holes 132 are arranged at intervals along the extension direction of the cooling channel 131. It can be understood that this arrangement ensures that the multiple through holes 132 are respectively arranged corresponding to the cooling jacket 14 and the second vacuum jacket 15, so that the multiple through holes 132 respectively connect the cooling cavity 141 and the cooling channel 131, and connect the second vacuum cavity 151 and the cooling channel 131.

[0100] In one embodiment, if Figure 1 As shown, the second air extraction ports 152 include a plurality of ports 152 that are spaced apart along the circumference of the second vacuum jacket 15. As can be appreciated, this arrangement ensures a balanced negative pressure within the second vacuum chamber 151 surrounding the cooling channel 131, thereby ensuring uniform cooling and shaping of the heat shrink tubing along the circumference.

[0101] like Figure 1 As shown, the first vacuum jacket 12, the cooling jacket 14, and the second vacuum jacket 15 are coaxially arranged. It can be understood that by arranging the first vacuum jacket 12, the cooling jacket 14, and the second vacuum jacket 15 coaxially, the connection between the first vacuum jacket 12, the cooling jacket 14, and the second vacuum jacket 15 and the expansion mold core 11 and the cooling mold core 13 is ensured.

[0102] In this embodiment, the cooling jacket 14 is provided with a connecting portion at one end adjacent to the first vacuum jacket 12, the first vacuum jacket 12 is sleeved on the connecting portion, and the connecting portion is sealedly connected to the outer wall of the cooling mold core 13. It can be understood that by providing the connecting portion on the cooling jacket 14, the first vacuum jacket 12 is sleeved on the connecting portion, which can improve the sealing performance between the first vacuum jacket 12 and the cooling jacket 14, and at the same time, the cooling jacket 14 can be sealedly connected to the outer wall of the cooling mold core 13 through the connecting portion, that is, the cooling mold core 13 passes through the connecting portion and is connected to the expansion mold core 11, and separates the first vacuum chamber 121 and the cooling chamber 141, avoiding interference between the first vacuum chamber 121 and the cooling chamber 141. Optionally, the first vacuum jacket 12 is a cylindrical structure with openings at both ends, and the cooling jacket 14 is a cylindrical structure with openings at both ends.

[0103] like Figure 1 As shown, the cooling sleeve 14 is provided with a connecting groove and a through hole provided on the bottom wall of the connecting groove at one end away from the first vacuum sleeve 12. The cooling mold core 13 is passed through the through hole and is sealed with the hole wall of the through hole. The second vacuum sleeve 15 is provided with a convex portion, which is accommodated in the connecting groove and is sealed with the side wall of the connecting groove.

[0104] It is understood that by providing a connecting groove on the cooling jacket 14 and a protrusion on the second vacuum jacket 15, the protrusion is accommodated in the connecting groove and sealed with the side wall of the connecting groove, thereby improving the sealing performance between the second vacuum jacket 15 and the cooling jacket 14; at the same time, the cooling mold core 13 is inserted into the through hole and sealed with the hole wall of the through hole to separate the second vacuum chamber 151 and the cooling chamber 141, thereby preventing interference between the second vacuum chamber 151 and the cooling chamber 141. Optionally, the second vacuum jacket 15 is a cylindrical structure with two ends open.

[0105] The expansion mold 100 proposed by the present invention is provided with an adjustment structure 2 at the inlet 114 of the expansion core 11 of the mold body 1, so that the pressure stabilizing die nozzle 211 of the adjustment structure 2 is provided at the inlet 114, and is provided with a first passage 2111 communicating with the expansion cavity 111, and an air leakage channel 112 is provided in the expansion core 11, and a first air permeable channel 2112 is provided on the pressure stabilizing die nozzle 211 corresponding to the air leakage channel 112, by providing the air leakage nozzle 212 and at the air leakage nozzle A second passage 2121 and a second air passage 2122 are provided on 212 corresponding to the first passage 2111 and the first air passage 2112, so that the adjusting cap 22 is movably sleeved on the pressure-stabilizing die nozzle 211 and covers the second air passage 2122 of the air leakage nozzle 212, and an inlet 221 is provided on the adjusting cap 22 corresponding to the second passage 2121, so that the heat shrink tube enters the first passage 2111 and the expansion cavity 111 through the inlet 221 and the second passage 2121.

[0106] As can be understood, by adjusting the movement of the adjusting cap 22 relative to the pressure-stabilizing die nozzle 211, the gap 222 formed between the adjusting cap 22 and the air leakage nozzle 212, which connects the second air permeable channel 2122 and the inlet 221, is adjusted, thereby adjusting the amount of air leakage into the second air permeable channel 2122 through the inlet 221 and the gap 222. This, in turn, controls the amount of air leakage into the first air permeable channel 2112 and the air leakage channel 112, thereby adjusting the thickness of the annular air film formed on the inner walls of the first passage 2111 and the expansion chamber 111, thereby preventing the heat shrink tubing from adhering to the inner walls of the first passage 2111 and the expansion chamber 111. Furthermore, the annular air film formed on the inner walls of the first passage 2111 and the expansion chamber 111 significantly reduces the dynamic frictional resistance between the heat shrink tubing and the inner walls of the first passage 2111 and the expansion chamber 111, thereby preventing stretching.

[0107] In this embodiment, by rotating the adjusting cap 22, a gap 222 is formed between the inner end surface of the adjusting cap 22 and the inlet end surface of the leakage nozzle 212. The size of the gap 222, and thus the amount of leakage, can be adjusted by adjusting the screwing depth of the adjusting cap 22. It is understood that the multiple air extraction holes 116 on the expansion core 11 are staggered with the multiple air leakage channels 112, so that gas is introduced into the expansion cavity 111 through the multiple air leakage channels 112 and the multiple second connecting grooves 113 to form an annular air film on the inner wall of the expansion cavity 111. The multiple air extraction holes 116 are used to expand the heat shrink tubing in the expansion cavity 111, thereby avoiding mutual interference and further ensuring the stability of heat shrink tubing production and the quality of the finished product.

[0108] The present invention also provides a processing device comprising a device body and an expansion mold 100, which is disposed within the device body. The specific structure of the expansion mold 100 is similar to that of the aforementioned embodiments. Since the present processing device utilizes all the technical solutions of all the aforementioned embodiments, it possesses at least all the beneficial effects of the technical solutions of the aforementioned embodiments, and therefore will not be further detailed here.

[0109] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An expansion die, characterized in that: The expansion mold comprises: A mold body, wherein the mold body is provided with an expansion cavity and an air leakage channel and an inlet communicating with the expansion cavity; and An adjusting structure, wherein the adjusting structure comprises a die nozzle assembly and an adjusting cap provided at the inlet, the die nozzle assembly being provided with a passage communicating with the inlet and a vent passage communicating with the air leakage passage, the vent passage being communicated with the passage, the adjusting cap being movably sleeved on an end of the die nozzle assembly away from the inlet to seal or open the vent passage, the adjusting cap being provided with an inlet corresponding to the passage; the die nozzle assembly comprising a pressure-stabilizing die nozzle and an air leakage nozzle, the pressure-stabilizing die nozzle being provided at the inlet, the pressure-stabilizing die nozzle being provided with a first passage communicating with the inlet and a first vent passage communicating with the air leakage passage channel, the first air permeable channel is connected to the first passage, the air leakage nozzle is provided at the end of the pressure-stabilizing die nozzle away from the inlet, the air leakage nozzle is provided with a second passage connected to the first passage and a second air permeable channel connected to the first air permeable channel, and the second air permeable channel is spaced apart from the second passage; the first passage and the second passage cooperate to form the passage, and the first air permeable channel and the second air permeable channel cooperate to form the air permeable channel; the adjusting cap is movably connected to the air leakage nozzle and / or the pressure-stabilizing die nozzle, and the pressure-stabilizing die nozzle is a cylindrical structure with openings at both ends; The adjusting cap is movable relative to the die nozzle assembly so that a gap is formed between the adjusting cap and the die nozzle assembly to communicate with the inlet and the air permeable channel.

2. The expansion die according to claim 1, wherein: The pressure stabilizing die nozzle is provided with a mounting groove at one end away from the inlet, the outer wall of the mounting groove is provided with an external thread, the first passage and the first air vent pass through the bottom wall of the mounting groove, and the air leakage nozzle is provided in the mounting groove; The adjusting cap is provided with an internal thread, and the adjusting cap is screwed to the pressure stabilizing die nozzle through the cooperation of the internal thread and the external thread; Wherein, the adjusting cap rotates relative to the pressure stabilizing die nozzle to adjust the size of the gap.

3. The expansion die according to claim 1, wherein: The pressure stabilizing die nozzle is provided with a plurality of the first air permeable channels, the plurality of the first air permeable channels are arranged at intervals and surround the first passage, and each of the first air permeable channels is connected to the first passage through a first connecting groove; The air leakage nozzle is provided with a plurality of second air permeable channels, the plurality of second air permeable channels are arranged at intervals and surround the second passage, and each second air permeable channel corresponds to and is connected to a first air permeable channel; The mold body is provided with a plurality of the air leakage channels, which are arranged around the expansion cavity. Each of the air leakage channels is connected to the expansion cavity through a second connecting groove, and each of the air leakage channels corresponds to and is connected to one of the first air permeable channels.

4. The expansion die according to claim 3, wherein: The second passage, the first passage and the expansion cavity are coaxially arranged; And / or, the second air permeable channel, the first air permeable channel and the air leakage channel are coaxially arranged; And / or, the air leakage channel is arranged in parallel with the expansion cavity, the first air permeable channel is arranged in parallel with the first passage, and the second air permeable channel is arranged in parallel with the second passage; And / or, the first passage is arranged to extend along the axial direction of the pressure stabilizing die nozzle, and the second passage is arranged to extend along the axial direction of the air leakage nozzle; And / or, the first communicating groove is a through-hole structure or a through-groove structure; And / or, the second communicating groove is a through hole structure or a through groove structure.

5. The expansion die according to any one of claims 1 to 4, characterized in that The mold body comprises: an expansion mold core, wherein the expansion mold core is provided with the expansion cavity, the air leakage channel, the inlet and the outlet, the inlet and the outlet are connected to the expansion cavity and are located at both ends of the expansion cavity, the expansion mold core is further provided with a plurality of air extraction holes connected to the expansion cavity, and the plurality of air extraction holes are staggered with the air leakage channel; and The first vacuum sleeve is arranged on the outer wall of the expansion mold core and is enclosed with the expansion mold core to form a first vacuum cavity. The first vacuum cavity is connected to the expansion cavity through multiple exhaust holes. The first vacuum sleeve is provided with a first exhaust port connected to the first vacuum cavity.

6. The expansion die according to claim 5, wherein: A limiting groove is provided at one end of the expansion mold core adjacent to the inlet, the expansion cavity and the air leakage channel are arranged through the bottom wall of the limiting groove, and the end of the mold nozzle assembly away from the adjustment cap is arranged in the limiting groove.

7. The expansion die according to claim 5, wherein: The mold body also includes: A cooling mold core is provided at the outlet, and the cooling mold core is provided with a cooling channel connected to the outlet and a plurality of through holes connected to the cooling channel; a cooling jacket, the cooling jacket being sleeved on the outer wall of the cooling mold core and connected to the first vacuum jacket, the cooling jacket and the cooling mold core enclosing a cooling cavity communicating with the through hole, the cooling jacket being provided with a water inlet communicating with the cooling cavity; and The second vacuum sleeve is arranged on the outer wall of the cooling mold core and is connected to the end of the cooling sleeve away from the first vacuum sleeve. The second vacuum sleeve and the cooling mold core enclose a second vacuum cavity connected to the through hole. The second vacuum sleeve is provided with a second vacuum port connected to the second vacuum cavity.

8. The expansion die according to claim 7, wherein: The expansion cavity is extended along the axial direction of the expansion mold core; And / or, the plurality of air extraction holes are arranged at intervals along the extension direction of the expansion cavity; And / or, the first air extraction port includes a plurality of ports, and the plurality of first air extraction ports are arranged at intervals along the circumference of the first vacuum jacket; And / or, the cooling channel is arranged to extend along the axial direction of the cooling mold core; And / or, the plurality of through holes are arranged at intervals along the extension direction of the cooling channel; And / or, the second air extraction port includes a plurality of ports, and the plurality of second air extraction ports are arranged at intervals along the circumference of the second vacuum jacket.

9. A processing equipment, characterized in that, The device comprises an apparatus body and an expansion mold according to any one of claims 1 to 8, wherein the expansion mold is provided on the apparatus body.

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