Forming die for rubber tube production

Abstract

The utility model relates to the technical field of rubber tube machining, and one embodiment of the utility model provides a forming mold for rubber tube production, which comprises a machining feeding cover, a forming discharging appliance is arranged at the lower end of the machining feeding cover, an overheating forming assembly is arranged in the forming discharging appliance, and an auxiliary feeding assembly is arranged in the machining feeding cover; the overheating forming assembly comprises an overheating cover. According to the technical scheme, the problems that in a common mold forming mode in the prior art, an upper mold and a lower mold are common in structure, mold cores are arranged in an upper mold and a lower mold to construct an inner cavity of a rubber pipe, demolding of straight-pipe rubber pipes is relatively easy, and core stripping can be conducted in a drawing mode are solved; the technical problems that in the prior art, the inner core of a bent pipe, especially a rubber pipe with an irregular inner cavity, cannot be pulled out through simple linear core pulling, so that the equipment cost and the operation difficulty are increased, the rubber pipe is easily damaged in the demolding process, and the product quality is influenced are solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of hose processing technology, and more specifically, to a molding die for hose production. Background Technology

[0002] As a tubular product widely used in various fields, the manufacturing process and the performance of the molding mold play a key role in product quality and production efficiency. In many industries such as industry, automobile, and medical, rubber hoses are used to transport various fluid media, such as chemicals in industrial production, coolant and fuel in automobile engines, and medical fluids in medical equipment. Different industries have different requirements for the specifications, performance and quality of rubber hoses.

[0003] Traditional hose molding processes have many limitations. For continuous hoses, extrusion equipment is often used. However, this method is not suitable for irregularly shaped hoses, hoses with joints, or hoses with large dimensions. In these cases, injection molding or compression molding is often used. Among common mold molding methods, the upper and lower mold structure is more common. The inner cavity of the hose is constructed by setting a core in the upper and lower molds. For straight hoses, demolding is relatively easy, and the core can be removed by pulling. However, for bent hoses, especially hoses with irregular inner cavities, simple straight core pulling cannot remove the core. This not only increases equipment costs and operational difficulty, but also easily damages the hose during demolding, affecting product quality.

[0004] When dealing with hoses with significant differences in inner diameter, such as hoses used for connectors, the ends need to be formed into convex or concave shapes with different inner diameters. Traditional core injection molding methods face enormous challenges. Due to the convex and concave structural characteristics, the corresponding shaped cores will get stuck in the molding position after molding. Neither pulling nor rotating demolding methods can solve this jamming problem. This makes it difficult to directly mold these hoses with different inner diameters along the axial direction in one go, which greatly limits the diversified design and production of hose products.

[0005] In the feeding stage, existing technologies also have shortcomings. Some molding dies use fixed feeding structures, which results in insufficient pull-out force when the hose is demolded, affecting production efficiency and product quality. Some traditional hose molding dies are inconvenient to operate during mold closing and opening, leading to a reduction in molding speed and thus affecting overall production efficiency. When vulcanizing low-pressure hoses, the end face cut of the hose often needs to be punched after vulcanization, which undoubtedly increases the processing steps, making the entire processing time-consuming, labor-intensive, and inefficient.

[0006] In the temperature control and shaping stages of the hose molding process, existing technologies are not satisfactory. During the molding process, some molds cannot meet the thermoplastic molding conditions of hoses of different specifications and materials due to insufficient precision in the heating method and temperature control of the raw materials. This results in unstable hose molding quality and a high scrap rate. In terms of hose shaping, traditional molds cannot guarantee the dimensional accuracy of the inner and outer diameters and the accuracy of the shape of the hose. Especially for some application scenarios with extremely high requirements for dimensional accuracy, such as aerospace and precision instruments, the limitations of traditional molds are becoming increasingly apparent.

[0007] In summary, existing hose molding dies have many shortcomings in terms of structural design, feeding method, demolding operation, temperature control, and shaping accuracy, making it difficult to meet the growing demand for diversified and high-precision hose production. Developing a new type of hose molding die to solve the above-mentioned technical problems and improve hose production efficiency and quality has become an urgent issue for the industry. Utility Model Content

[0008] To overcome the above-mentioned defects, the embodiments of this disclosure provide a molding die for hose production, which solves the problem that in the common molding methods of the prior art, the upper and lower mold structure is more common. The inner cavity of the hose is constructed by setting a mold core in the upper and lower molds. For straight hoses, demolding is relatively easy and the core can be removed by pulling. However, for bent hoses, especially hoses with irregular inner cavities, simple straight core pulling cannot remove the inner core. This not only increases equipment costs and operation difficulty, but also easily damages the hose during demolding, affecting product quality.

[0009] According to one aspect, at least one embodiment of the present disclosure provides a molding die for hose production, comprising:

[0010] A processing feed hood, wherein a forming discharge device is provided at the lower end of the processing feed hood;

[0011] An overheated forming assembly, wherein the overheated forming assembly is disposed inside the forming discharge device;

[0012] An auxiliary feeding assembly is disposed inside the processing feed hood;

[0013] The overheated forming assembly includes an overheated shroud, which is disposed on the lower end face of the processing feed shroud. An overheated cavity is provided inside the overheated shroud, and the overheated cavity is fitted onto the forming discharge device. Circulation tubes are provided at opposite ends of the overheated shroud, and the circulation tubes are connected to the overheated cavity.

[0014] As a further technical solution, the circulatory cannula is provided with anti-stripping grooves, and the end of the circulatory cannula is provided with a thickened positioning ring.

[0015] As a further technical solution, the auxiliary feeding assembly includes a feeding hood, which is disposed on the side wall of the processing feeding hood and is connected to the processing feeding hood. A pressing cylinder is disposed at the upper end of the processing feeding hood, and a pressing plate is disposed at the output end of the pressing cylinder. The pressing plate is embedded inside the processing feeding hood.

[0016] As a further technical solution, a molding core is provided inside the processing feed hood, the upper end face of the molding core is fixedly connected to the inner top of the processing feed hood, and the lower end of the molding core is inserted into the interior of the molding discharge device.

[0017] As a further technical solution, the forming discharge device is a hollow tube, which passes through the processing feed hood and the overheating hood.

[0018] As a further technical solution, a feed flare is provided between the upper end face of the overheating shroud and the forming discharge device.

[0019] As a further technical solution, the inner bottom surface of the processing feed hood is an inverted frustum structure, and a downward pressing and fitting inclined surface is provided at the edge of the lower pressure plate, which matches the inner bottom structure of the processing feed hood.

[0020] As a further technical solution, the lower pressure plate is provided with a through hole, and the through hole is sealed and inserted into the molded inner core.

[0021] The beneficial effects of the embodiments disclosed herein are as follows:

[0022] 1. In this disclosure, the auxiliary feeding component of the mold is ingeniously designed. The feeding hood is connected to the processing feeding hood, allowing the raw material to be smoothly fed in. The setting of the pressure cylinder driving the pressure plate, utilizing the matching characteristics of the pressure-fitting inclined surface and the bottom structure inside the processing feeding hood, can efficiently compact and push the raw material. Compared with the problem of insufficient demolding force in traditional fixed structure feeding molds, this mold lays a good foundation for subsequent molding and demolding in the feeding stage, ensuring that the raw material enters the molding and discharging device evenly and stably. At the same time, in the superheated molding component, a high-temperature medium is introduced into the superheated chamber through the circulation tube, and the flow rate, temperature and circulation speed of the medium can be precisely adjusted to accurately meet the thermoplastic molding conditions of rubber hoses of different specifications and materials. This precise temperature control and stable feeding method avoids molding quality problems caused by uneven heating of raw materials and unstable feeding, effectively reduces the scrap rate, and significantly improves the molding quality and production efficiency of rubber hoses.

[0023] 2. In this disclosure, traditional molds face difficulties in demolding irregularly shaped hoses, such as bends or connecting hoses with significant differences in inner diameter, severely limiting product design and production. However, this mold, through the reasonable cooperation between the forming ejector and the forming core, allows the raw material to be shaped around the forming core within the forming ejector during the hose forming process. The forming core provides stable support, while the forming ejector constrains the external contour, making the demolding process smoother after the hose is formed. Even for hoses with complex shapes, there is no need to use complicated rotation demolding methods, reducing equipment costs and operational difficulties. At the same time, it avoids damage to the hose during demolding. This not only simplifies the demolding process but also allows hoses with different inner diameters along the axial direction and with convex or concave structures to be directly formed in one step, greatly expanding the diversified design and production range of hose products and meeting the needs of more industries for special hoses. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0025] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0026] Figure 2 This is a cross-sectional view of the processing feed hood disclosed herein;

[0027] Figure 3 This is a cross-sectional view of the superheater shield disclosed herein;

[0028] Figure 4 This is an isometric view of the circulatory cannulation procedure disclosed herein;

[0029] In the diagram: 1. Processing feed hood; 2. Molding discharge device; 3. Overheating molding assembly; 3-1. Overheating hood; 3-2. Overheating chamber; 3-3. Circulation tube; 3-4. Anti-fraying groove; 3-5. Thickened positioning ring; 4. Auxiliary feeding assembly; 4-1. Feeding hood; 4-2. Pressing cylinder; 4-3. Pressing plate; 4-4. Molding core; 5. Feed flare; 6. Through hole; 7. Pressing and bonding slope. Detailed Implementation

[0030] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0031] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0032] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0033] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0035] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] like Figures 1-4 As shown, a molding die for producing hoses according to this disclosure is illustrated, comprising:

[0037] Processing feed hood 1, with a forming discharge device 2 provided at the lower end of processing feed hood 1;

[0038] Overheat forming component 3 is disposed inside forming discharge device 2;

[0039] Auxiliary feeding component 4 is installed inside the processing feeding hood 1;

[0040] The overheating forming assembly 3 includes an overheating cover 3-1, which is located on the lower end face of the processing feed cover 1. An overheating cavity 3-2 is provided inside the overheating cover 3-1. The overheating cavity 3-2 is fitted onto the forming discharge device 2. Circulation tubes 3-3 are provided at opposite ends of the overheating cover 3-1, and the circulation tubes 3-3 are connected to the overheating cavity 3-2.

[0041] The auxiliary feeding assembly 4 includes a feeding hood 4-1, which is disposed on the side wall of the processing feeding hood 1 and is connected to the processing feeding hood 1. A pressing cylinder 4-2 is provided at the upper end of the processing feeding hood 1, and a pressing plate 4-3 is provided at the output end of the pressing cylinder 4-2. The pressing plate 4-3 is embedded inside the processing feeding hood 1.

[0042] In some examples, a feeding hood 4-1 is installed on the side wall of the processing feed hood 1 to ensure smooth communication between the feeding hood 4-1 and the processing feed hood 1, without blockages or gaps, so that the raw material can smoothly enter the processing feed hood 1. A pressing cylinder 4-2 is installed at the upper end of the processing feed hood 1, and a pressing plate 4-3 is installed at the output end of the pressing cylinder 4-2, so that the pressing plate 4-3 is embedded inside the processing feed hood 1. During installation, attention should be paid to ensuring that the pressing and fitting inclined surface 7 at the edge of the pressing plate 4-3 matches the inverted frustum-shaped inner bottom surface structure of the processing feed hood 1 to ensure the sealing and stability of the pressing process. The superheating cover 3-1 is installed on the lower end face of the processing feed hood 1, so that the superheating cavity 3-2 is fitted onto the molding discharge device 2. After the components are installed, the mold is adjusted as a whole, the pressing cylinder 4-2 is started, and the pressing plate 4-3 is checked. Check if the pressing action is smooth, the pressing position is accurate, and the fit with the inner bottom surface of the processing feed hood 1 is tight. Connect the circulation tube 3-3 to the external circulation equipment and check if the circulation system is unobstructed and if there are any leaks. Observe the circulation flow of the medium by introducing the medium into the superheated chamber 3-2 to ensure that the superheated forming component 3 can work normally. Pre-treat the raw materials required for hose production. Perform heating, stirring and other operations according to the characteristics of the raw materials to make them suitable for processing. For some raw materials that need to be melted, heat them to the appropriate melting temperature and stir them thoroughly to ensure the quality and fluidity of the raw materials. Put the pre-treated raw materials into the processing feed hood 1 through the feeding hood 4-1. Pay attention to controlling the feeding speed and amount when feeding to avoid putting too much raw material at once, which may cause blockage or affect the processing effect.

[0043] After the raw material enters the molding discharge device 2, a high-temperature medium, such as high-temperature steam or heat transfer oil, is introduced into the superheated chamber 3-2 through the circulation tube 3-3. The superheated chamber 3-2 heats the raw material in the molding discharge device 2, causing it to be molded in a high-temperature environment. The high-temperature medium circulates in the superheated chamber 3-2 and transfers heat through the superheated cover 3-1 to ensure that the raw material is heated evenly. In the molding discharge device 2, under the action of the superheated molding component 3, the raw material is gradually molded into a rubber tube around the molding core 4-4. The molding core 4-4 plays a supporting and shaping role, ensuring that the internal shape and size of the rubber tube meet the requirements. The molded rubber tube is output from the lower end of the molding discharge device 2, completing one production process. During the discharge process, a traction device can be set as needed to pull the molded rubber tube to ensure smooth discharge and maintain a certain tension to prevent the rubber tube from deforming.

[0044] like Figures 1-4 As shown in the figure, this embodiment proposes that the circulation cannula 3-3 is provided with an anti-stripping groove 3-4, and the end of the circulation cannula 3-3 is provided with a thickened positioning ring 3-5.

[0045] In some examples, circulation tubes 3-3 are installed at opposite ends of the superheated shroud 3-1 to ensure that the circulation tubes 3-3 are connected to the superheated cavity 3-2, and that the anti-stripping grooves 3-4 on the circulation tubes 3-3 and the thickened positioning rings 3-5 at the ends are installed correctly to facilitate connection with external circulation equipment and prevent them from falling off during the connection process.

[0046] For example, such as Figure 2 As shown, a forming core 4-4 is provided inside the processing feed hood 1. The upper end face of the forming core 4-4 is fixedly connected to the inner top of the processing feed hood 1, and the lower end of the forming core 4-4 is inserted into the interior of the forming discharge device 2.

[0047] In some examples, the upper end face of the molding core 4-4 is fixedly connected to the inner top of the processing feed hood 1. The molding core 4-4 serves as the inner core of the hollow tube, and its lower end is inserted into the molding discharge device 2 to ensure a firm connection and prevent loosening during production.

[0048] For example, such as Figure 2 As shown, the forming discharge device 2 is a hollow tube, which passes through the processing feed hood 1 and the superheated hood 3-1.

[0049] In some examples, the forming discharge device 2 passes through the processing feed hood 1 and the superheated hood 3-1. Since the forming discharge device 2 is a hollow tube, its position must be accurate during installation to avoid displacement that could affect the forming of the hose.

[0050] For example, such as Figure 2 As shown, a feed flare 5 is provided between the upper end face of the superheated cover 3-1 and the forming discharge device 2.

[0051] In some examples, the feed flare 5 is used to more effectively enter the interior of the forming discharge device 2 when the raw material of the hose is pressed down after entering the processing feed hood 1.

[0052] For example, such as Figure 2 As shown, the inner bottom surface of the processing feed hood 1 is an inverted frustum structure, and a pressing and fitting inclined surface 7 is provided at the edge of the lower pressure plate 4-3. The pressing and fitting inclined surface 7 matches the inner bottom structure of the processing feed hood 1.

[0053] In some examples, the lowering cylinder 4-2 is activated, and the lowering plate 4-3 moves downward under the action of the cylinder. By utilizing the cooperation between the lowering and fitting inclined surface 7 and the inner bottom surface of the processing feed hood 1, the raw material is initially compacted and pushed, so that the raw material can smoothly enter the forming and discharging device 2.

[0054] For example, such as Figure 2 As shown, a through hole 6 is provided on the lower pressure plate 4-3, and the through hole 6 is sealed and inserted into the molded inner core 4-4.

[0055] In some examples, the through hole 6 on the lower pressure plate 4-3 is sealed to the molding core 4-4 to prevent material leakage.

[0056] When in use, the molding die for hose production mainly consists of a processing feed hood 1, a molding discharge device 2, an overheating molding component 3, and an auxiliary feeding component 4 working together to realize the molding process of the hose from raw material to finished product. Its core working principle is based on three key links: mechanical pressure pushing, high temperature thermoplastic molding, and precise shaping.

[0057] The feeding hood 4-1 in the auxiliary feeding assembly 4 serves as the raw material inlet, responsible for conveying the pre-treated tubing raw material to the processing feeding hood 1. When the raw material is fed into the feeding hood 4-1, it falls naturally into the processing feeding hood 1 under gravity. At this time, the downward pressing cylinder 4-2 installed at the upper end of the processing feeding hood 1 begins to work, outputting power to push the downward pressing plate 4-3 downward. Because the edge of the downward pressing plate 4-3 is provided with a downward pressing and fitting inclined surface 7 that matches the inverted frustum-shaped inner bottom surface structure of the processing feeding hood 1, the downward pressing plate 4-3 moves downward... Pressure is applied to the raw material to initially compact it. At the same time, the movement of the lower pressure plate 4-3 also has a pushing effect. Utilizing the cooperation between the inclined surface and the bottom surface, the raw material is pushed along the inner wall of the processing feed hood 1 towards the forming discharge device 2, so that the raw material can smoothly enter the forming discharge device 2 for the next step of processing. During this process, the through hole 6 on the lower pressure plate 4-3 is sealed and inserted into the forming inner core 4-4, which not only ensures the stability of the movement of the lower pressure plate 4-3, but also prevents the raw material from leaking from the gap between the lower pressure plate 4-3 and the forming inner core 4-4, ensuring that the raw material is pushed along the predetermined path inside the processing feed hood 1.

[0058] The superheated forming assembly 3 is a key component in hose forming. Its core function is to heat the raw material using a high-temperature medium to achieve the conditions for thermoplastic forming. The superheated chamber 3-2 inside the superheated cover 3-1 is fitted onto the forming discharge device 2 and connected to an external high-temperature medium circulation system via a circulation pipe 3-3. When the raw material enters the forming discharge device 2, the high-temperature medium, such as high-temperature steam or heat transfer oil, is driven by the external equipment and flows through the circulation pipe 3-3 into the superheated chamber 3-2. The high-temperature medium circulates within the superheated chamber 3-2. Due to the excellent thermal conductivity of the superheated cover 3-1… Heat is rapidly transferred to the molding discharge device 2, which in turn heats the raw material inside the molding discharge device 2. The raw material gradually softens under high temperature and enters a thermoplastic state. By adjusting the flow rate, temperature and circulation speed of the medium in the circulating tube 3-3, the temperature and heating time in the superheated chamber 3-2 can be precisely controlled. Different specifications and materials of the rubber tube require different thermoplastic conditions. Through this precise adjustment, the raw material can be shaped according to the shape of the molding discharge device 2 and the molding core 4-4 at the appropriate temperature and time, thereby achieving the initial molding of the rubber tube.

[0059] The molding ejector 2 and the molding core 4-4 together constitute the mold cavity for hose molding, playing a shaping role. The molding ejector 2 is a hollow tube that passes through the processing feed hood 1 and the superheated hood 3-1. Its internal space and shape determine the external contour of the hose. The upper end of the molding core 4-4 is fixedly connected to the top of the processing feed hood 1, and the lower end is inserted into the molding ejector 2. Its shape and size determine the internal diameter and shape of the hose. When the raw material softens under the action of the superheated molding component 3, it fills the internal space of the molding ejector 2 around the molding core 4-4 under the pressure of the auxiliary feed component 4. As the raw material cools and solidifies, its shape gradually becomes fixed, eventually forming a hose with specific inner and outer diameter dimensions and shape. During the molding process, the molding core 4-4 provides support to prevent the hose from collapsing and ensures the accuracy of the internal shape of the hose. The molding ejector 2 constrains the external contour of the raw material to ensure the accuracy of the external dimensions of the hose. The two work together to achieve precise shaping of the hose.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A molding die for producing rubber hoses, characterized in that, include: A processing feed hood (1) is provided with a forming discharge device (2) at the lower end of the processing feed hood (1); Overheat forming assembly (3), the overheat forming assembly (3) being disposed inside the forming discharge device (2); An auxiliary feeding assembly (4) is disposed inside the processing feed hood (1); The overheated forming assembly (3) includes an overheated cover (3-1), which is disposed on the lower end face of the processing feed cover (1). An overheated cavity (3-2) is provided inside the overheated cover (3-1), which is fitted onto the forming discharge device (2). Circulation tubes (3-3) are provided at opposite ends of the overheated cover (3-1), and the circulation tubes (3-3) are connected to the overheated cavity (3-2).

2. The molding die for producing rubber hoses according to claim 1, characterized in that, The circulating cannula (3-3) is provided with anti-stripping grooves (3-4), and the end of the circulating cannula (3-3) is provided with a thickened positioning ring (3-5).

3. The molding die for producing rubber hoses according to claim 1, characterized in that, The auxiliary feeding assembly (4) includes a feeding hood (4-1), which is disposed on the side wall of the processing feeding hood (1). The feeding hood (4-1) is connected to the processing feeding hood (1). A pressing cylinder (4-2) is disposed at the upper end of the processing feeding hood (1). A pressing plate (4-3) is disposed at the output end of the pressing cylinder (4-2). The pressing plate (4-3) is embedded inside the processing feeding hood (1).

4. The molding die for producing rubber hoses according to claim 3, characterized in that, The processing feed hood (1) is provided with a molding core (4-4) inside. The upper end face of the molding core (4-4) is fixedly connected to the inner top of the processing feed hood (1), and the lower end of the molding core (4-4) is inserted into the interior of the molding discharge device (2).

5. A molding die for producing rubber hoses according to claim 1, characterized in that, The forming discharge device (2) is a hollow tube, and the forming discharge device (2) passes through the processing feed hood (1) and the superheat hood (3-1).

6. A molding die for producing rubber hoses according to claim 5, characterized in that, A feed flare (5) is provided between the upper end face of the overheat cover (3-1) and the forming discharge device (2).

7. A molding die for producing rubber hoses according to claim 3, characterized in that, The inner bottom surface of the processing feed hood (1) is an inverted frustum structure, and the edge of the lower pressure plate (4-3) is provided with a lower pressure fitting slope (7), which matches the inner bottom structure of the processing feed hood (1).

8. A molding die for producing rubber hoses according to claim 4, characterized in that, The lower pressure plate (4-3) is provided with a through hole (6), and the through hole (6) is sealed and inserted into the molded inner core (4-4).

Images