Rolling brush mold

Abstract

The invention relates to the technical field of molds, and discloses a rolling brush mold which comprises a front mold plate and a rear mold plate. A front mold core is arranged at the bottom of the front mold plate and provided with an injection molding opening. The rear mold plate is detachably connected to the front mold plate, the rear mold plate is provided with a mandrel, and the top of the rear mold plate is provided with a plurality of rear mold cores matched with the front mold cores. The multiple rear mold cores are distributed in the circumferential direction with the axis direction of the mandrel as the axial direction and movably arranged on the rear mold plate in the radial direction, so that when the front mold plate and the rear mold plate are closed, the multiple rear mold cores are closed in the radial direction to jointly define a mold cavity, and a first mold cavity communicating with a mold cavity fluid is jointly formed between every two adjacent rear mold cores; the multiple first cavities are arranged at intervals in a divergent shape along the periphery of the mold cavity. According to the rolling brush mold disclosed by the invention, the problems of strain, deformation and even breakage caused by mechanical interference between the brush teeth of the rolling brush and the mold cavity in the demolding process are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, in particular to a roller brush mold. Background Art

[0002] Molds are key tools used in the industrial field for mass production of product molding. Through processes such as injection molding, die-casting, stamping, and forging, molds use their cavities to give metals, plastics, ceramics and other raw materials specific shapes and sizes, achieving efficient and mass production of products. They are widely used in many fields such as automobiles, electronics, and consumer products.

[0003] Roller brushes with a cylindrical, diverging structure face significant demolding bottlenecks during injection molding. Traditional molds utilize a linear ejection mechanism. For roller brushes with spiral teeth or radial protrusions, mechanical interference between the teeth and the mold cavity during demolding can easily lead to damage, deformation, or even breakage of the finished product. While existing improvements, such as inclined ejector mechanisms or slider core pulling, can alleviate some of these interference issues, the complex motion trajectories increase mold manufacturing costs, and the clearances between multiple components can easily lead to flash defects. For example, the risk of melt overflow occurs when the parting surface clearance exceeds 0.03mm. Summary of the Invention

[0004] In order to solve the deficiencies of the prior art, the present invention provides a roller brush mold, which avoids the problem of the brush teeth of the roller brush being mechanically interfered with the mold cavity during the demoulding process, thereby causing strain, deformation or even breakage.

[0005] The technical effects to be achieved by the present invention are achieved through the following technical solutions: The present invention provides a roller brush mold, comprising: A front mold plate, the bottom of which is provided with a front mold core, and the front mold core is provided with an injection port; and A rear template is detachably connected to the front template, the rear template is provided with a core shaft, and a top of the rear template is provided with a plurality of rear mold cores that cooperate with the front mold cores; wherein, with the axis direction of the core shaft as the axial direction, a plurality of the rear mold cores are distributed circumferentially and are movably arranged on the rear template along the radial direction, so that when the front template and the rear template are closed, the plurality of the rear mold cores are closed together along the radial direction to form a mold cavity, a first cavity in fluid communication with the mold cavity is formed between two adjacent rear mold cores, and a plurality of the first cavities are divergently spaced along the outer circumference of the mold cavity; at least one placement cavity in fluid communication with the mold cavity is circumferentially formed on the radial inner end surface of each of the rear mold cores, an insert is arranged in the placement cavity, and a second cavity is formed between the insert and the radial side wall of the placement cavity; the core shaft is movably arranged in the mold cavity, and a guide channel is formed between the core shaft and the side wall of the mold cavity; When the front template and the rear template are opened, the plurality of rear mold cores are dispersed from each other to achieve demoulding.

[0006] In some implementations, the roller brush mold further includes an exhaust mechanism, which is connected to the radially outer end of the first cavity and / or the radially outer end of the second cavity and is used to exhaust gas during injection molding.

[0007] In this implementation, the exhaust mechanism avoids the problem of bubbles being generated when the rubber material is squeezed into the first cavity and / or the second cavity during the injection molding process, and the gas in the bubbles cannot be discharged, thereby affecting the product quality, further improving the reliability of the roller brush mold.

[0008] In some implementations, the exhaust mechanism includes a first exhaust structure and a second exhaust structure, the first exhaust structure is in gas communication with the first mold cavity, and the second exhaust structure is in gas communication with the second mold cavity.

[0009] In some implementations, the first exhaust structure includes a first exhaust groove formed between two adjacent rear mold cores and in gas communication with the first mold cavity.

[0010] In this implementation, bubbles generated after the rubber material enters the first cavity escape to the external environment through the first exhaust groove.

[0011] In some implementations, the second exhaust structure includes a plurality of second exhaust grooves and exhaust channels that are interconnected, the plurality of second exhaust grooves are axially spaced apart on the radial side of the insert, and the exhaust channels are formed between the radial side of the insert and the placement cavity.

[0012] In this implementation, bubbles generated after the rubber enters the second cavity escape to the external environment through the second exhaust groove and the exhaust channel in sequence. In addition, since multiple second exhaust grooves are axially spaced apart on the radial side of the insert, the bubble escape effect is better.

[0013] In some implementations, the radial inner end surface of the rear mold core is circumferentially provided with at least one third cavity connected to the mold cavity fluid, and the third cavity is provided with an insert, and the insert is provided with a third exhaust groove for exhausting gas during injection molding.

[0014] In some implementations, a plurality of first tooth blocks arranged and distributed along the axial direction are provided between two radial side walls of the first cavity.

[0015] In this implementation, multiple first tooth blocks divide the first cavity into multiple first molding cavities along the axial direction, and the rubber enters the multiple first molding cavities respectively, so that the injection-molded roller brush includes multiple sub-brush teeth in one of the brush teeth arranged along the axial direction, thereby improving the practicality and reliability of the roller brush product.

[0016] In some implementations, a plurality of second tooth-shaped blocks extending from the radial side surfaces of the inserts and abutting against the side walls of the placement cavity are arranged axially and distributed on the radial side surfaces of the inserts.

[0017] In some implementations, a side of the front mold core close to the rear mold core is provided with a avoidance groove along the circumference of the injection port for avoiding the core shaft, and a guide groove is provided on the inner wall of the avoidance groove, which is respectively connected to each of the rear mold cores.

[0018] In some implementations, the roller brush mold also includes a rear mold base, and the rear mold core is further provided with an inclined slider. The rear mold core is provided with a guide inclined groove, and the inclined slider is passed through the guide inclined groove. The bottom of the inclined slider is connected to the rear mold base. When the mold is opened, the rear mold base drives the inclined slider to slide in the guide inclined groove, thereby driving the multiple rear mold cores to disperse from each other.

[0019] In this implementation, when the mold is opened, the rear mold base moves in the direction away from the front mold core, that is, it moves axially. Since the inclined slider is set at an angle, when the rear mold base moves axially, the inclined slider will drive the rear mold core to move in the radial direction, thereby causing multiple rear mold cores to disperse from each other to achieve demolding.

[0020] In some implementations, the rear mold plate is provided with a radial slide rail, and the rear mold core is provided with a radial slide groove that cooperates with the radial slide rail to enable the rear mold core to slide radially.

[0021] In summary, the present invention has at least the following benefits: The roller brush mold provided by the present invention has a plurality of rear mold cores distributed along the circumferential direction with the core shaft as the axis. In the mold closing state, the plurality of rear mold cores are jointly arranged to form a mold cavity. The core shaft is arranged in the mold cavity, and a first cavity connected to the mold cavity fluid is formed between two adjacent rear mold cores. The plurality of first cavities are distributed in a divergent shape along the periphery of the mold cavity. Each rear mold core is provided with at least a placement cavity connected to the mold cavity fluid. An insert is arranged in the placement cavity, and a second cavity is formed between the insert and the radial side wall of the placement cavity. The rubber enters the mold cavity through the injection port and then enters the first cavity and the second cavity respectively through the guide channel, thereby completing the injection molding. When the film is opened, the plurality of rear mold cores are driven by the movement of the rear template to disperse from each other to achieve demolding. This avoids the problem of mechanical interference between the brush teeth of the roller brush and the mold cavity during the demolding process, which causes strain, deformation or even breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an exploded view of the roller brush mold of Example 1; Figure 2 for Figure 1 The structural diagram of the rear mold core shown; Figure 3 for Figure 2 The shown partial enlarged view of the rear mold core at point A; Figure 4 This is an exploded view of the rear mold core of Example 1; Figure 5 for Figure 4 The schematic structural diagram of the insert shown; Figure 6 This is a schematic structural diagram of the front mold core of Example 2; Figure 7 This is a schematic cross-sectional view of the roller brush mold of Example 3.

[0023] Markings in the figure: 100, front mold plate; 110, front mold core; 111, injection port; 112, avoidance groove; 113, guide groove; 200, rear mold plate; 210, mandrel; 220, rear mold core; 221, placement cavity; 222, insert; 2221, second toothed block; 223, second cavity; 224, third cavity; 225, insert; 226, oblique slider; 227, guide chute; 228, radial slide; 230, mold cavity; 231, guide channel; 240, first cavity; 241, first toothed block; 250, radial slide; 300, exhaust mechanism; 310, first exhaust structure; 311, first exhaust groove; 312, exhaust flow channel; 320, second exhaust structure; 321, second exhaust groove; 322, exhaust channel; 400, rear mold base. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0026] Example 1: Please see the attached Figure 1 ~Attached Figure 5 The roller brush mold of the present invention includes a front template 100 and a rear template 200.

[0027] Please combine Figures 1 to 3 , Figure 1 The diagram shows the structural relationship between the front template 100 and the rear template 200 in the embodiment of the present invention. Figure 2 and Figure 3 The figure illustrates the specific structure of the rear mold core 220 in an embodiment of the present invention. For ease of description, the following three directions are defined: axial, radial, and circumferential. The axial direction is parallel to the axis of the core shaft 210, i.e., the axial direction is along the axis of the core shaft 210; the radial direction is along the cross-sectional radius of the core shaft 210, and the radial direction is perpendicular to the axis; the circumferential direction is the circumferential direction of the core shaft 210, i.e., the direction around the axis of the core shaft 210, and the circumferential direction is perpendicular to the axis and the cross-sectional radius.

[0028] Specifically, a front mold core 110 is provided at the bottom of the front template 100, and the front mold core 110 is provided with an injection port 111; the rear template 200 is detachably connected to the front template 100, and the rear template 200 is provided with a core shaft 210, and the top of the rear template 200 is provided with multiple rear mold cores 220 that cooperate with the front mold core 110. Among them, with the axial direction of the core shaft 210 as the axial direction, multiple rear mold cores 220 are distributed circumferentially and are movably arranged in the radial direction on the rear template 200, so that when the front template 100 and the rear template 200 are closed, the multiple rear mold cores 220 are closed in the radial direction to form a mold cavity 230, and a first mold cavity 240 that is fluidically connected to the mold cavity 230 is formed between two adjacent rear mold cores 220. Multiple first mold cavities 240 are divergently spaced along the outer periphery of the mold cavity 230; the radial inner end face of each rear mold core 220 is circumferentially provided with at least one placement cavity 221 that is fluidically connected to the mold cavity 230, an insert 222 is arranged in the placement cavity 221, and a second mold cavity 223 is formed between the insert 222 and the radial side wall of the placement cavity 221; the core shaft 210 is movably arranged in the mold cavity 230, and a guide channel 231 is formed between the core shaft 210 and the side wall of the mold cavity 230. When the front template 100 and the rear template 200 are opened, the plurality of rear mold cores 220 are dispersed from each other to achieve demolding.

[0029] In this embodiment, a plurality of rear mold cores 220 are distributed along the circumferential direction with the core shaft 210 as the axis, and can move radially relative to the rear template 200. When the front template 100 and the rear template 200 are in the mold closing state, the plurality of rear mold cores 220 are closed in the radial direction to form a mold cavity 230. The core shaft 210 is arranged in the mold cavity 230, and a first mold cavity 240 is formed between two adjacent rear mold cores 220. The first mold cavity 240 is fluidically connected to the mold cavity 230. The plurality of first mold cavities 240 are arranged in a divergent shape along the outer periphery of the mold cavity 230. Each rear mold core 220 is provided with at least one placement cavity 221 that is fluidically connected to the mold cavity 230. An insert 222 is arranged in the placement cavity 221, and a second mold cavity 223 is formed between the insert 222 and the radial side wall of the placement cavity 221. Specifically, when the mold is closed, the front template 100 and the rear template 200 approach each other, and the front mold core 110 abuts against multiple rear mold cores 220 at the same time. The rubber enters the mold cavity 230 formed by multiple rear mold cores 220 through the injection port 111 of the front mold core 110, and then enters the first cavity 240 and the second cavity 223 respectively through the guide channel 231 formed between the core shaft 210 and the side wall of the mold cavity 230, thereby completing the injection molding, so that the roller brush that has completed the injection molding has brush teeth with divergent shapes; when the film is opened, the front template 100 and the rear template 200 move away from each other, and the front mold core 110 releases the state of abutting against the multiple rear mold cores 220. The multiple rear mold cores 220 are dispersed from each other under the drive of the movement of the rear template 200, thereby realizing demolding.

[0030] Preferably, the number of rear mold cores 220 is four, so that the angle between two adjacent first cavities 240 is less than 45°, and the radial inner end face of each rear mold core 220 is circumferentially provided with two placement cavities 221 in fluid communication with the mold cavity 230, and the angle between two adjacent second cavities 223 and the angle between the first cavity 240 and the second cavity 223 are both less than 45°, thereby facilitating demolding and avoiding the roller brush being stretched or deformed due to mechanical interference between the brush teeth of the roller brush and the mold cavity 230 during the demolding process.

[0031] It is understood that due to the divergent structure of the roller brush teeth, if the angle between two adjacent first cavities 240, the angle between two adjacent second cavities 223, or the angle between the first cavity 240 and the second cavity 223 is greater than 45°, the roller brush teeth may be easily strained or damaged during demolding, thereby affecting product quality. Furthermore, since the first cavity 240 is formed between two adjacent rear mold cores 220, a gap is created between the two rear mold cores 220 for gas flow. This prevents bubbles in the rubber material from forming and preventing gas from escaping during mold closing and injection molding.

[0032] In the above-mentioned roller brush mold, multiple rear mold cores 220 are distributed in the circumferential direction with the core shaft 210 as the axis. In the mold closing state, multiple rear mold cores 220 are jointly arranged to form a mold cavity 230. The core shaft 210 is arranged in the mold cavity 230, and a first mold cavity 240 connected to the fluid of the mold cavity 230 is jointly formed between two adjacent rear mold cores 220. Multiple first mold cavities 240 are distributed in a divergent manner along the outer periphery of the mold cavity 230. Each rear mold core 220 is provided with at least a placement cavity 221 connected to the fluid of the mold cavity 230. An insert 222 is arranged in the placement cavity 221, and a second mold cavity 223 is formed between the insert 222 and the radial side wall of the placement cavity 221. The rubber material enters the mold cavity 230 through the injection port 111 and then flows through the guide channel 231 into the first and second mold cavities 240 and 223, respectively, completing the injection molding process. During the film opening process, the multiple rear mold cores 220 are driven by the movement of the rear mold plate 200 to disperse from each other, thus achieving demolding. This prevents the brush teeth of the roller brush from mechanically interfering with the mold cavity 230 during the demolding process, which could cause damage, deformation, or even breakage.

[0033] In some preferred embodiments, see Figure 3 , Figure 3 The diagram illustrates the structural relationship between the exhaust mechanism 300 and the first and second cavities 240 and 223, respectively, in an embodiment of the present invention. Specifically, in some preferred embodiments, the roller brush mold further includes an exhaust mechanism 300 connected to and in communication with the radially outer end of the first cavity 240 and / or the radially outer end of the second cavity 223, for exhausting gas during injection molding. This avoids the problem of bubbles generated when the rubber material is squeezed into the first cavity 240 and / or the second cavity 223 during the injection molding process, preventing the gas in the bubbles from being exhausted and thus affecting product quality, thereby further improving the reliability of the roller brush mold.

[0034] In some preferred embodiments, the exhaust mechanism 300 includes a first exhaust structure 310 and a second exhaust structure 320. The first exhaust structure 310 is in gaseous communication with the first mold cavity 240, and the second exhaust structure 320 is in gaseous communication with the second mold cavity 223. Bubbles generated by the rubber material in the first mold cavity 240 escape to the external environment through the first exhaust structure 310, while bubbles generated by the rubber material in the second mold cavity 223 escape to the external environment through the second exhaust structure 320. This improves the exhaust efficiency of the gas in the first mold cavity 240 and the second mold cavity 223, thereby ensuring product quality.

[0035] In some preferred embodiments, see Figure 4 , Figure 4The diagram illustrates the structural relationship between the first vent groove 311 and the first mold cavity 240 in an embodiment of the present invention. Specifically, the first vent structure 310 includes a first vent groove 311 formed between two adjacent rear mold cores 220 and in gaseous communication with the first mold cavity 240. Bubbles generated after the rubber enters the first mold cavity 240 escape to the external environment through the first vent groove 311. Specifically, there are multiple first vent grooves 311, each of which is axially spaced apart on the radial side of the rear mold core 220 to provide a more effective venting effect.

[0036] Furthermore, an exhaust channel 312 is provided on the radial side surface of the rear mold core 220 , and bubbles escape to the external environment through the first exhaust groove 311 and the exhaust channel 312 in sequence.

[0037] In some preferred embodiments, please combine Figure 4 and Figure 5 , Figure 4 and Figure 5 The diagram illustrates the structural relationship between the second exhaust groove 321, exhaust channel 322, and placement cavity 221 in an embodiment of the present invention. Specifically, the second exhaust structure 320 includes a plurality of second exhaust grooves 321 and exhaust channels 322 that are interconnected. The plurality of second exhaust grooves 321 are axially spaced apart on the radial side of the insert 222, and the exhaust channel 322 is formed between the radial side of the insert 222 and the placement cavity 221. Bubbles generated after the rubber enters the second mold cavity 223 escape to the external environment through the second exhaust grooves 321 and exhaust channels 322 in sequence. Furthermore, because the plurality of second exhaust grooves 321 are axially spaced apart on the radial side of the insert 222, the bubble escape effect is improved.

[0038] In some more preferred embodiments, see Figure 4 , Figure 4 The diagram illustrates the structural relationship between the rear mold core 220 and the third mold cavity 224 in an embodiment of the present invention. Specifically, the radially inner end surface of the rear mold core 220 is circumferentially defined with at least one third mold cavity 224 in fluidic communication with the mold cavity 230. An insert 225 is disposed within the third mold cavity 224, which is provided with a third vent groove for venting gas during injection molding. After the rubber enters the mold cavity 230, it flows through the guide channel 231 into the first mold cavity 240, the second mold cavity 223, and the third mold cavity 224, respectively. Bubbles generated by the rubber entering the third mold cavity 224 escape to the external environment through the third vent grooves, thereby ensuring product quality. Preferably, there are multiple third vent grooves, each of which is axially spaced apart on the radial side of the insert 225.

[0039] Example 2: The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the roller brush mold of the present invention. Figure 4 ~Attached Figure 6 .

[0040] Among them, see Figure 4 , Figure 4 The diagram illustrates the structural relationship between the first cavity 240 and the first toothed block 241 in the embodiment of the present invention. Specifically, a plurality of first toothed blocks 241 arranged and distributed along the axial direction are provided between the two radial side walls of the first cavity 240.

[0041] In this embodiment, a plurality of first tooth blocks 241 divide the first cavity 240 into a plurality of first molding cavities along the axial direction, and the rubber enters the plurality of first molding cavities respectively, so that the injection-molded roller brush includes a plurality of sub-brush teeth in one of the brush teeth arranged along the axial direction, thereby improving the practicality and reliability of the roller brush product.

[0042] Furthermore, among the multiple first exhaust grooves 311 spaced apart along the axial direction on the radial side surface of the rear mold core 220 , each first molding cavity corresponds to at least one first exhaust groove 311 , thereby making exhaust more reliable.

[0043] In some preferred embodiments, see Figure 5 , Figure 5 The diagram illustrates the structural relationship between the insert 222 and the second toothed block 2221 in an embodiment of the present invention. Specifically, multiple second toothed blocks 2221 extend from the radial side surfaces of the multiple inserts 222, abutting the sidewalls of the placement cavity 221. The multiple second toothed blocks 2221 are axially arranged and distributed along the radial side surfaces of the insert 222. The multiple second toothed blocks 2221 are axially distributed and abut the radial sidewalls of the placement cavity 221, thereby axially dividing the second mold cavity 223 into multiple second molding cavities. The rubber material enters each of the multiple second molding cavities, resulting in an injection-molded roller brush having multiple sub-brush teeth within one axially arranged tooth.

[0044] Furthermore, among the plurality of second exhaust grooves 321 spaced apart along the axial direction on the radial side surface of the insert 222 , each second molding cavity corresponds to at least one second exhaust groove 321 , thereby making exhaust more reliable.

[0045] In some preferred embodiments, a plurality of third tooth-shaped blocks are disposed axially between the two radial sidewalls of the third cavity 224. The plurality of third tooth-shaped blocks axially divide the third cavity 224 into a plurality of third molding cavities. The rubber material enters each of the plurality of third molding cavities, thereby enabling the injection-molded roller brush to have a plurality of sub-brush teeth within one axially disposed tooth.

[0046] In some more preferred embodiments, see Figure 6 , Figure 6 The diagram illustrates the structural relationship between the avoidance groove 112 and the guide groove 113 in an embodiment of the present invention. Specifically, a avoidance groove 112 for avoiding the core shaft 210 is provided along the circumference of the injection port 111 on one side of the front mold core 110 close to the rear mold core 220, and a guide groove 113 is provided on the inner wall of the avoidance groove 112, which is connected to each rear mold core 220 respectively. When the mold is closed, the top of the core shaft 210 abuts against the avoidance groove 112, and the rubber enters the guide channel 231 formed between the side wall of the mold cavity 230 and the core shaft 210 respectively through the guide groove 113, and then enters the first cavity 240, the second cavity 223 and the third cavity 224 of the multiple rear mold cores 220 respectively through the guide channel 231. Preferably, when the number of the rear mold cores 220 is four, the number of the guide grooves 113 is set to four and is set in a one-to-one correspondence with the four rear mold cores 220.

[0047] Example 3: The difference between this embodiment and embodiment 2 is that this embodiment further optimizes the structure of the roller brush mold of the present invention. Figure 7 .

[0048] Among them, the roller brush mold also includes a rear mold base 400, and an inclined slider 226 is provided on the rear mold core 220. The rear mold core 220 is provided with a guide inclined groove 227. The inclined slider 226 is passed through the guide inclined groove 227, and the bottom of the inclined slider 226 is connected to the rear mold base 400. When the mold is opened, the rear mold base 400 drives the inclined slider 226 to slide in the guide inclined groove 227, thereby driving multiple rear mold cores 220 to disperse from each other.

[0049] In this embodiment, when the mold is opened, the rear mold base 400 moves in the direction away from the front mold core 110, that is, moves in the axial direction. Since the inclined slider 226 is set at an angle, when the rear mold base 400 moves in the axial direction, the inclined slider 226 will drive the rear mold core 220 to move in the radial direction, thereby causing the multiple rear mold cores 220 to disperse from each other to achieve demolding.

[0050] In some preferred embodiments, the rear mold plate 200 is provided with radial slide rails 250, and the rear mold core 220 is provided with radial slide grooves 228 that cooperate with the radial slide rails 250 to enable radial sliding of the rear mold core 220. When the mold is opened and / or closed, the radial slide grooves 228 slide along the radial slide rails 250, thereby ensuring stability when the multiple rear mold cores 220 are dispersed and / or closed, thereby making the overall structure more reliable.

[0051] In the roller brush mold of the present invention, multiple rear mold cores 220 are distributed in the circumferential direction with the core shaft 210 as the axis. In the mold closing state, the multiple rear mold cores 220 are jointly arranged to form a mold cavity 230. The core shaft 210 is arranged in the mold cavity 230, and a first mold cavity 240 connected to the fluid of the mold cavity 230 is jointly formed between two adjacent rear mold cores 220. The multiple first mold cavities 240 are distributed in a divergent manner along the outer periphery of the mold cavity 230. Each rear mold core 220 is provided with at least a placement cavity 221 connected to the fluid of the mold cavity 230. An insert 222 is arranged in the placement cavity 221, and a second mold cavity 223 is formed between the insert 222 and the radial side wall of the placement cavity 221. The rubber material enters the mold cavity 230 through the injection port 111 and then flows through the guide channel 231 into the first and second mold cavities 240 and 223, respectively, completing the injection molding process. During the film opening process, the multiple rear mold cores 220 are driven by the movement of the rear mold plate 200 to disperse from each other, thus achieving demolding. This prevents the brush teeth of the roller brush from mechanically interfering with the mold cavity 230 during the demolding process, which could cause damage, deformation, or even breakage.

[0052] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0053] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0054] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0055] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] Although the present invention has been described with reference to the above specific embodiments, it will be apparent to those skilled in the art that many substitutions, modifications, and variations can be made based on the above. Therefore, all such substitutions, modifications, and variations are intended to be encompassed within the spirit and scope of the appended claims.

Claims

1. A roller brush mold, characterized in that: include: A front mold plate (100) is provided with a front mold core (110) at the bottom, and the front mold core (110) is provided with an injection port (111); and A rear template (200) is detachably connected to the front template (100), the rear template (200) is provided with a core shaft (210), and a top of the rear template (200) is provided with a plurality of rear mold cores (220) that cooperate with the front mold cores (110); Wherein, with the axis direction of the core shaft (210) as the axial direction, a plurality of the rear mold cores (220) are distributed circumferentially and are movably arranged on the rear template (200) along the radial direction, so that when the front template (100) and the rear template (200) are closed, the plurality of the rear mold cores (220) are closed together along the radial direction to form a mold cavity (230), and a first mold cavity (240) is formed between two adjacent rear mold cores (220) and is fluidically connected to the mold cavity (230). The plurality of the first mold cavities (240) are arranged along the mold cavity (230). 0) The outer periphery is arranged in a divergent shape at intervals; the radial inner end surface of each rear mold core (220) is circumferentially provided with at least one placement cavity (221) in fluid communication with the mold cavity (230), an insert (222) is provided in the placement cavity (221), and a second cavity (223) is formed between the insert (222) and the radial side wall of the placement cavity (221); the core shaft (210) is movably arranged in the mold cavity (230), and a guide channel (231) is formed between the core shaft (210) and the side wall of the mold cavity (230); When the front template (100) and the rear template (200) are opened, the plurality of rear mold cores (220) are dispersed from each other to achieve demoulding.

2. The roller brush mold according to claim 1, characterized in that: It also includes an exhaust mechanism (300), which is connected to the radial outer end of the first cavity (240) and / or the radial outer end of the second cavity (223) and is used to exhaust gas during injection molding.

3. The roller brush mold according to claim 2, characterized in that: The exhaust mechanism (300) comprises a first exhaust structure (310) and a second exhaust structure (320), wherein the first exhaust structure (310) is in gas communication with the first cavity (240), and the second exhaust structure (320) is in gas communication with the second cavity (223).

4. The roller brush mold according to claim 3, characterized in that: The first exhaust structure (310) comprises a first exhaust groove (311) formed between two adjacent rear mold cores (220) and in gas communication with the first mold cavity (240).

5. The roller brush mold according to claim 3, characterized in that: The second exhaust structure (320) comprises a plurality of second exhaust grooves (321) and an exhaust channel (322) that are interconnected. The plurality of second exhaust grooves (321) are arranged at intervals along the axial direction on the radial side of the insert (222). The exhaust channel (322) is formed between the radial side of the insert (222) and the placement cavity (221).

6. The roller brush mold according to claim 1, characterized in that: The radial inner end surface of the rear mold core (220) is also provided with at least one third cavity (224) in circumferential direction and in fluid communication with the mold cavity (230). An insert (225) is provided in the third cavity (224), and the insert (225) is provided with a third exhaust groove for exhausting gas during injection molding.

7. The roller brush mold according to claim 4, characterized in that: A plurality of first tooth-shaped blocks (241) arranged and distributed along the axial direction are provided between the two radial side walls of the first cavity (240).

8. The roller brush mold according to claim 7, characterized in that: A plurality of second toothed blocks (2221) extending from the radial side surfaces of the plurality of inserts (222) and abutting against the side walls of the placement cavity (221) are arranged axially and distributed on the radial side surfaces of the inserts (222).

9. The roller brush mold according to claim 1, characterized in that: A side of the front mold core (110) close to the rear mold core (220) is provided with a avoidance groove (112) along the circumference of the injection port (111) for avoiding the core shaft (210), and a guide groove (113) is provided on the inner wall of the avoidance groove (112) and is connected to each rear mold core (220).

10. The roller brush mold according to claim 1, characterized in that: The invention also includes a rear mold base (400), an inclined slider (226) is provided on the rear mold core (220), and a guide inclined groove (227) is provided on the rear mold core (220). The inclined slider (226) is passed through the guide inclined groove (227), and the bottom of the inclined slider (226) is connected to the rear mold base (400). When the mold is opened, the rear mold base (400) drives the inclined slider (226) to slide in the guide inclined groove (227), thereby driving the plurality of rear mold cores (220) to disperse from each other.

11. The roller brush mold according to claim 10, characterized in that: The rear mold plate (200) is provided with a radial slide rail (250), and the rear mold core (220) is provided with a radial slide groove (228) that cooperates with the radial slide rail (250) to enable the rear mold core (220) to slide radially.

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