Glue injection molding process for hose shoulder and hose

Abstract

The hose shoulder glue injection molding process comprises the following steps that a hose body is placed in a mold, the end of the hose body extends into a cavity, the mold is provided with glue injection channels and at least two glue inlet runners, the glue inlet runners correspond to the glue injection channels and are evenly distributed around the glue injection channels at intervals, and the glue injection channels are communicated with the cavity; one end of each glue inlet runner is communicated with the glue injection channel, the other end of each glue inlet runner is communicated with the position, corresponding to the inner wall of the discharging port of the material nozzle, of the cavity, glue injection is conducted on the mold through an injection molding machine, and glue is distributed to the multiple glue inlet runners through the glue injection channel and input into the cavity; demolding after cooling and shaping, so that the redundant rubber material on the obtained shoulder injection hose semi-finished product is the water gap excess material connected to the inner wall of the discharge hole; and the semi-finished shoulder injection hose is placed in a stamping device, a connecting structure between the inner wall of the discharging opening and the water gap excess material is cut off in a stamping mode, and a finished shoulder injection hose is obtained. The process method is beneficial to reducing the possibility of generating powder chippings and reducing the flash quantity at the edge of the discharge port.

Description

Technical Field

[0001] The invention relates to the technical field of packaging containers, in particular to a glue injection molding process for a hose shoulder and a hose. Background Art

[0002] The shoulder structure of the existing packaging hose is made by hot runner injection molding. During production, the through tube body is fed into the mold. The mold is provided with a cavity in the shape of the shoulder structure at the end of the tube body. The injection molding machine injects glue into the cavity, and after cooling and shaping, the mold is removed to obtain the following Figure 1 The shoulder-injected hose semi-finished product shown in the figure is then removed from the excess injection molding material on the shoulder structure of the shoulder-injected hose semi-finished product to obtain the final shoulder-injected hose product. In the existing shoulder-injected process design, the injection port is usually set at the center axis of the hose. The mold cavity usually reserves a layer of gap structure on the upper side of the shoulder corresponding to the nozzle position to connect the injection channel with the cavity. On the obtained shoulder-injected hose semi-finished product, Figure 1 As shown, the rubber material at the gap structure will cause a thin-walled injection molding residue 30 to form on the upper side of the nozzle 21 of the shoulder 20. The injection molding residue 30 completely blocks the discharge port of the nozzle 21. When removing the residue, the existing process is to drill through the injection molding residue 30 to remove the obstruction of the discharge port of the nozzle 21 by the injection molding residue 30. However, such a method of removing the residue is prone to generate powder debris during the drilling process. The powder debris is easy to adhere to the inner wall of the tube body 10, affecting the subsequent material filling. Moreover, since the injection molding residue 30 is thin-walled, it is easy to generate more burrs at the edge of the discharge port of the nozzle 21 during drilling, resulting in an increase in batch volume, affecting the appearance quality of the product, requiring additional deburring and polishing steps, affecting processing efficiency and production costs. Summary of the Invention

[0003] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, the present invention proposes a process for injection molding of hose shoulders. By improving the location and shape of excess rubber on the semi-finished shoulder-injected hose and using a stamping method to separate excess nozzle material from the inner wall of the discharge port, the process reduces the likelihood of powder debris and minimizes the amount of flaking at the edge of the discharge port, thereby ensuring the quality of the finished shoulder-injected hose.

[0004] The present invention also provides a hose manufactured by adopting the above-mentioned hose shoulder injection molding process.

[0005] The injection molding process for the hose shoulder according to the first embodiment of the present invention comprises the following steps:

[0006] Injection molding, providing a tube body and a mold, placing the tube body in the mold so that the end of the tube body extends into the mold cavity, the mold is provided with a glue injection channel and a glue feed runner, the axis of the glue injection channel is collinear with the axis of the tube body in the mold, at least two glue feed runners are provided corresponding to each glue injection channel, and multiple glue feed runners are evenly spaced and arranged around the corresponding glue injection channels, one end of the glue feed runner is connected to the glue injection channel, and the other end of the glue feed runner is connected to the position of the inner wall of the discharge port of the corresponding nozzle of the mold cavity, and the mold is injected with glue by an injection molding machine, so that the glue is injected through the glue injection channel and diverted to the multiple glue feed runners, and then input into the mold cavity by the glue feed runner;

[0007] Cooling and demoulding: cooling the rubber material in the cavity, and then demoulding to obtain a shoulder-injected hose semi-finished product, wherein the end of the tube body is formed with an integrated shoulder, the shoulder has a nozzle and a discharge port is formed at the nozzle, and the inner wall of the discharge port is connected to the nozzle residue formed by the cooling of the rubber material in the injection channel and the glue feed flow channel;

[0008] The excess material is removed, and the semi-finished shoulder-injected hose is placed in a stamping device. The connecting structure between the inner wall of the discharge port and the nozzle excess material is stamped and cut off along the axial direction of the tube body by stamping, so that the nozzle excess material is separated from the inner wall of the discharge port to obtain the finished shoulder-injected hose.

[0009] The glue injection molding process for the hose shoulder according to the embodiment of the present invention has at least the following beneficial effects: when performing the glue injection molding step, the glue is injected through the glue injection channel and diverted to multiple glue feed channels, and then input into the mold cavity by the glue feed channels. The connecting position between the glue feed channels and the mold cavity is arranged at the inner wall of the discharge port of the corresponding nozzle, thereby making the excess glue on the semi-finished shoulder-injected hose obtained by cooling and demolding the nozzle residue connected to the inner wall of the discharge port, thereby improving the formation position and shape of the excess glue on the semi-finished shoulder-injected hose; when performing the residue removal step, the connecting structure between the inner wall of the discharge port and the nozzle residue is punched and cut off by punching, so that the nozzle residue is separated from the inner wall of the discharge port to obtain the finished shoulder-injected hose, which is beneficial to reduce the possibility of generating powder debris and reduce the amount of batch front at the edge of the discharge port, thereby ensuring the product quality of the finished shoulder-injected hose.

[0010] According to some embodiments of the present invention, two glue feed channels are provided corresponding to each glue injection channel, and the two glue feed channels are connected to the corresponding glue injection channels to form an inverted "Y"-shaped channel structure.

[0011] According to some embodiments of the present invention, a glue inlet is provided between the glue feed channel and the mold cavity and is connected through the glue inlet. The diameter of the glue inlet is a preset value A, and the value range of the preset value A is: 0.3mm≤A≤0.5mm.

[0012] According to some embodiments of the present invention, in the injection molding step, the injection stroke of the mold is controlled in sections, which are the first injection stroke, the second injection stroke and the third injection stroke, respectively. In the first injection stroke, the injection pressure adopted by the injection molding machine is a preset value F1, and the injection speed is a preset value S1. In the second injection stroke, the injection pressure adopted by the injection molding machine is a preset value F2, and the injection speed is a preset value S2. In the third injection stroke, the injection pressure adopted by the injection molding machine is a preset value F3, and the injection speed is a preset value S3, wherein: F1≤F3≤F2, S1≤S3≤S2.

[0013] According to some embodiments of the present invention, the value range of the preset value F1 is: 20MPa≤F1≤40MPa; the value range of the preset value F2 is: 110MPa≤F2≤130MPa; the value range of the preset value F3 is: 50MPa≤F3≤70MPa; the value range of the preset value S1 is: 25mm / s≤S1≤35mm / s; the value range of the preset value S2 is: 75mm / s≤S2≤85mm / s; the value range of the preset value S3 is: 55mm / s≤S3≤65mm / s.

[0014] According to some embodiments of the present invention, after the mold cavity is filled with the glue, a preset injection pressure F5 is used to maintain the glue in the mold cavity. The preset value F5 has a value range of 90 MPa≤F5≤110 MPa.

[0015] According to some embodiments of the present invention, in the cooling and demolding step, cooling is performed by delivering coolant into the mold, wherein the delivery pressure of the coolant is a preset value F4, the temperature of the coolant is a preset value T, the value range of the preset value F4 is: 0.3MPa≤F4≤0.5MPa, and the value range of the preset value T is: 15℃≤T≤18℃.

[0016] According to some embodiments of the present invention, in the excess material removing step, the stamping direction adopted is parallel to the axis of the tube body and is from the inner side of the tube body to the outer side of the discharge port.

[0017] According to some embodiments of the present invention, when the connection structure between the inner wall of the discharge port and the residual material at the nozzle is punched and cut off, a suction device is provided to perform suction on the discharge port.

[0018] The hose according to the embodiment of the second aspect of the present invention is manufactured by the injection molding process of the hose shoulder according to the embodiment of the first aspect of the present invention.

[0019] The hose described in the embodiment of the present invention has at least the following beneficial effects: by adopting the above-mentioned injection molding process for the hose shoulder, it is helpful to reduce the possibility of generating powder debris when removing excess rubber at the nozzle and reduce the amount of batch front at the edge of the discharge port, thereby ensuring the product quality of the hose.

[0020] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0022] Figure 1 This is a schematic structural diagram of a semi-finished shoulder-injected hose in the background technology of the present invention;

[0023] Figure 2 This is a schematic structural diagram of a semi-finished shoulder-injected hose in an embodiment of the present invention;

[0024] Figure 3 Schematic diagram of a partial cross-sectional structure of a mold during the injection molding step in an embodiment of the present invention.

[0025] Reference numerals:

[0026] Tube body 10, shoulder 20, nozzle 21, discharge port 22, injection molding residue 30, nozzle residue 40;

[0027] Mold 100 , cavity 101 , glue injection channel 102 , glue feed channel 103 , glue inlet 104 . DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that if orientation descriptions are involved, the orientations or positional relationships indicated, such as up, down, front, back, left, and right, are based on the orientations or positional relationships shown in the accompanying drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, if the words such as several, greater than, less than, exceed, above, below, within, etc. appear, among which, several means one or more, and more means more than two, greater than, less than, exceed, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself.

[0031] If the first and second are described, they are only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Reference Figure 2 and Figure 3 , a glue injection molding process for a hose shoulder, comprising the following steps:

[0034] Injection molding, a tube body 10 and a mold 100 are provided, the tube body 10 is placed in the mold 100, the end of the tube body 10 extends into the cavity 101 of the mold 100, the mold 100 is provided with a glue injection channel 102 and a glue feed flow channel 103, the axis of the glue injection channel 102 is collinear with the axis of the tube body 10 in the mold 100, at least two glue feed flow channels 103 are provided corresponding to each glue injection channel 102, and multiple glue feed flow channels 103 are evenly spaced and arranged around the corresponding glue injection channels 102, one end of the glue feed flow channel 103 is connected to the glue injection channel 102, and the other end of the glue feed flow channel 103 is connected to the position of the inner wall of the discharge port 22 of the nozzle 21 corresponding to the cavity 101, and the mold 100 is injected with glue by an injection molding machine, so that the glue is injected through the glue injection channel 102 and diverted to the multiple glue feed flow channels 103, and is input into the cavity 101 by the glue feed flow channels 103;

[0035] Cooling and demoulding: cooling the rubber material in the cavity 101, and then demoulding to obtain a shoulder-injected hose semi-finished product, wherein the end of the tube body 10 is formed with an integrated shoulder 20, the shoulder 20 has a nozzle 21 and a discharge port 22 formed at the nozzle 21, and the inner wall of the discharge port 22 is connected to the nozzle residue 40 formed by the cooling of the rubber material in the injection channel 102 and the glue feed channel 103;

[0036] The excess material is removed, and the semi-finished shoulder-injected hose is placed in a stamping device. The connecting structure between the inner wall of the discharge port 22 and the nozzle excess material 40 is stamped and cut off along the axial direction of the tube body 10 by stamping, so that the nozzle excess material 40 is separated from the inner wall of the discharge port 22 to obtain the finished shoulder-injected hose.

[0037] It is understandable that if Figure 3 As shown, during the injection molding step, the glue is injected through the injection channel 102 and divided into multiple glue feed channels 103, and then input into the mold cavity 101 through the glue feed channel 103. The communication position between the glue feed channel 103 and the mold cavity 101 is set at the inner wall of the discharge port 22 of the corresponding nozzle 21, referring to Figure 2 , thereby making the excess rubber on the semi-finished injection-shoulder hose obtained by cooling and demoulding the nozzle excess material 40 connected to the inner wall of the discharge port 22, improving the formation position and shape of the excess rubber on the semi-finished injection-shoulder hose, compared with Figure 1 The existing semi-finished shoulder-injected hose shown in the figure is Figure 2 On the improved shoulder-injected hose semi-finished product shown, the nozzle residue 40 only partially blocks the discharge port 22, and the nozzle residue 40 and the discharge port 22 are point-connected, and the connection structure is relatively weak. Therefore, when performing the residue removal step, the connection structure between the inner wall of the discharge port 22 and the nozzle residue 40 can be punched and cut off by punching, so that the nozzle residue 40 is separated from the inner wall of the discharge port 22 to obtain the shoulder-injected hose finished product. Compared with the existing drilling method to remove the residue, the nozzle residue 40 is cut off by punching, which is beneficial to reduce the possibility of generating powder debris when removing excess rubber at the nozzle 21, avoid affecting the subsequent material filling, and reduce the amount of batch edge at the discharge port 22. Even if burrs are generated during punching and cutting, the burrs are only on the inner wall of the discharge port 22 and will not affect the subsequent film packaging of the discharge port 22, thereby ensuring the product quality of the shoulder-injected hose finished product.

[0038] In actual application, the specific number and distribution of the glue inlet flow channels 103 and the specific structure of the cavity 101 can be set accordingly according to actual use needs.

[0039] In some embodiments, two glue feed channels 103 are provided for each glue injection channel 102 , and the two glue feed channels 103 are connected to the corresponding glue injection channels 102 to form an inverted “Y”-shaped channel structure.

[0040] It is understandable that if Figure 2 and Figure 3As shown, the two glue feed channels 103 are symmetrically arranged relative to the glue injection channel 102 and are both connected to the corresponding glue injection channel 102 to form an inverted "Y"-shaped channel structure. The lower end of the glue feed channel 103 is connected to the position of the inner wall of the discharge port 22 of the nozzle 21 corresponding to the mold cavity 101. Its structure is simple, which is conducive to the uniform diversion of the glue in the glue injection channel 102 to the two glue feed channels 103, which is conducive to the uniform injection of the glue into the mold cavity 101. It can also reduce the number of connection points between the inner wall of the discharge port 22 and the nozzle residue 40 in the obtained shoulder-injected hose semi-finished product, which is conducive to stamping and cutting the connection structure between the inner wall of the discharge port 22 and the nozzle residue 40 for ease of use. In actual application, the number of glue feed channels 103 corresponding to each glue injection channel 102 can also be three or four, which can be set accordingly according to actual use needs.

[0041] In some embodiments, a glue inlet 104 is provided between the glue inlet channel 103 and the mold cavity 101 and is connected through the glue inlet 104. The diameter of the glue inlet 104 is a preset value A, and the preset value A has a value range of: 0.3mm≤A≤0.5mm.

[0042] It is understandable that if Figure 3 As shown, the glue inlet channel 103 is connected to the mold cavity 101 through the glue inlet 104. By setting the diameter of the glue inlet 104 within the range of 0.3mm to 0.5mm (inclusive), the opening size of the glue inlet 104 is relatively appropriate, which can not only achieve a good glue injection effect, but also make it easier to punch and cut the connection structure between the inner wall of the discharge port 22 and the nozzle residual material 40, facilitating the punching and removal of the nozzle residual material 40. In actual application, the preset value A can be 0.3mm, 0.4mm, or 0.5mm, and can be set accordingly according to actual needs.

[0043] In some embodiments, in the injection molding step, the injection stroke of the mold 100 is controlled in sections, which are the first injection stroke, the second injection stroke and the third injection stroke respectively. In the first injection stroke, the injection pressure adopted by the injection molding machine is the preset value F1, and the injection speed is the preset value S1. In the second injection stroke, the injection pressure adopted by the injection molding machine is the preset value F2, and the injection speed is the preset value S2. In the third injection stroke, the injection pressure adopted by the injection molding machine is the preset value F3, and the injection speed is the preset value S3, wherein: F1≤F3≤F2, S1≤S3≤S2.

[0044] It is understandable that by implementing segmented control over the injection stroke of the mold 100, in the first injection stroke, the injection molding machine uses a relatively low injection pressure and injection speed, which can achieve a slow start and a stable and noise-reducing effect. In the second injection stroke, the injection molding machine uses a relatively high injection pressure and injection speed, which is conducive to quickly filling the mold cavity 101 with the glue and reducing the production cycle time. Finally, in the second injection stroke, the injection molding machine further reduces the injection pressure and injection speed, achieving a slightly slow injection effect, which is conducive to avoiding the impact on product quality caused by excessive injection pressure and excessive speed. In actual application, the specific stroke value of each injection stroke can be set accordingly according to actual use needs.

[0045] Specifically, the value range of the preset value F1 is: 20MPa≤F1≤40MPa; the value range of the preset value F2 is: 110MPa≤F2≤130MPa; the value range of the preset value F3 is: 50MPa≤F3≤70MPa; the value range of the preset value S1 is: 25mm / s≤S1≤35mm / s; the value range of the preset value S2 is: 75mm / s≤S2≤85mm / s; the value range of the preset value S3 is: 55mm / s≤S3≤65mm / s.

[0046] It is understood that the above ranges of values ​​for injection pressure and speed in each injection stroke are relatively suitable, which are conducive to achieving a good injection effect and ensuring the product quality of the shoulder-injected hose semi-finished product. In actual application, the preset value F1 can be 20MPa, 30MPa, or 40MPa, the preset value F2 can be 110MPa, 120MPa, or 130MPa, the preset value F3 can be 50MPa, 60MPa, or 70MPa, the preset value S1 can be 25mm / s, 30mm / s, or 35mm / s, the preset value S2 can be 75mm / s, 80mm / s, or 85mm / s, and the preset value S3 can be 55mm / s, 60mm / s, or 65mm / s. The specific settings can be made accordingly according to actual use needs.

[0047] In some embodiments, after the mold cavity 101 is filled with the glue, a preset injection pressure F5 is used to maintain the pressure of the glue in the mold cavity 101 . The preset value F5 has a value range of 90 MPa≤F5≤110 MPa.

[0048] It is understood that by maintaining the pressure of the rubber in cavity 101 after filling cavity 101 with the rubber, and using a larger pressure to compensate for the shrinkage of the rubber, it is beneficial to reduce defects and improve density, thereby ensuring the product quality of the semi-finished shoulder-injected hose. By setting the pressure range during the pressure maintenance period to 90MPa to 110MPa (including the endpoint values), the pressure during the pressure maintenance period is relatively appropriate, which can not only achieve a good pressure maintenance effect, but also reduce the possibility of flash, making it easier to use. In actual application, the pressure maintenance can be performed at the end of the third injection stroke, the pressure maintenance time can be 2 seconds, and the preset value F5 can be 90MPa, 100MPa, or 110MPa, which can be set accordingly according to actual use needs.

[0049] In some embodiments, in the cooling and demolding step, cooling is performed by delivering coolant into the mold 100, wherein the delivery pressure of the coolant is a preset value F4, the temperature of the coolant is a preset value T, the value range of the preset value F4 is: 0.3MPa≤F4≤0.5MPa, and the value range of the preset value T is: 15℃≤T≤18℃.

[0050] It is understood that by delivering coolant into mold 100, the rubber material in cavity 101 is cooled using the principle of heat exchange. The coolant delivery pressure is set within a range of 0.3 MPa to 0.5 MPa (inclusive), and the coolant temperature is set within a range of 15°C to 18°C ​​(inclusive). These delivery pressures and temperatures are both suitable, achieving a good cooling effect while reducing the likelihood of condensation on the surface of mold 100, thus facilitating ease of use. In actual use, the preset value F4 can be 0.3 MPa, 0.4 MPa, or 0.5 MPa, and the preset value T can be 15°C, 16°C, or 18°C, and can be set accordingly based on actual needs.

[0051] In some embodiments, in the excess material removal step, the stamping direction used is parallel to the axis of the tube body 10 and is from the inside of the tube body 10 to the outside of the discharge port 22 .

[0052] It can be understood that in the residual material removal step, the stamping direction is from the inside of the tube body 10 to the outside of the discharge port 22, thereby causing the separated sprue residual material 40 to be discharged to the outside of the nozzle 21. Even if powder debris is generated, it will be discharged outward under the influence of the stamping direction, which is beneficial to reduce the possibility of powder debris adhering to the inner wall of the tube body 10 and avoid affecting the subsequent material loading.

[0053] Furthermore, when the connection structure between the inner wall of the discharge port 22 and the nozzle residual material 40 is punched and cut off, a suction device is provided to perform suction on the discharge port 22 .

[0054] It is understood that by providing a suction device to suction the discharge port 22, on the one hand, it is possible to conveniently collect the separated nozzle residue 40. On the other hand, under the suction effect, even if powder debris is generated during the punching and cutting, it will be sucked outward, further reducing the possibility of powder debris adhering to the inner wall of the tube body 10 and avoiding affecting subsequent material loading. In actual application, the suction device can be an industrial vacuum cleaner, a negative pressure fan, etc., and the specific setting can be corresponding to actual use needs.

[0055] The hose according to the second embodiment of the present invention is manufactured by the injection molding process of the hose shoulder according to the first embodiment of the present invention.

[0056] The hose according to the embodiment of the present invention adopts the above-mentioned injection molding process for the hose shoulder, which is beneficial to reducing the possibility of generating powder debris when removing excess rubber at the nozzle 21 and reducing the amount of batch front at the edge of the discharge port 22, thereby ensuring the product quality of the hose.

[0057] Since other components of the hose and the processing methods of other parts of the embodiment of the present invention are well known to those skilled in the art, they will not be described in detail here.

[0058] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. A glue injection molding process for a hose shoulder, characterized in that: The following steps are involved: Injection molding, providing a tube body and a mold, placing the tube body in the mold so that the end of the tube body extends into the mold cavity, the mold is provided with a glue injection channel and a glue feed runner, the axis of the glue injection channel is collinear with the axis of the tube body in the mold, at least two glue feed runners are provided corresponding to each glue injection channel, and multiple glue feed runners are evenly spaced and arranged around the corresponding glue injection channels, one end of the glue feed runner is connected to the glue injection channel, and the other end of the glue feed runner is connected to the position of the inner wall of the discharge port of the corresponding nozzle of the mold cavity, and the mold is injected with glue by an injection molding machine, so that the glue is injected through the glue injection channel and diverted to the multiple glue feed runners, and then input into the mold cavity by the glue feed runner; Cooling and demoulding: cooling the rubber material in the cavity, and then demoulding to obtain a shoulder-injected hose semi-finished product, wherein the end of the tube body is formed with an integrated shoulder, the shoulder has a nozzle and a discharge port is formed at the nozzle, and the inner wall of the discharge port is connected to the nozzle residue formed by the cooling of the rubber material in the injection channel and the glue feed flow channel; The excess material is removed, and the semi-finished shoulder-injected hose is placed in a stamping device. The connecting structure between the inner wall of the discharge port and the nozzle excess material is stamped and cut off along the axial direction of the tube body by stamping, so that the nozzle excess material is separated from the inner wall of the discharge port to obtain the finished shoulder-injected hose.

2. The injection molding process for the hose shoulder according to claim 1, characterized in that: Two glue feed channels are provided corresponding to each glue injection channel, and the two glue feed channels are connected to the corresponding glue injection channels to form an inverted "Y"-shaped channel structure.

3. The injection molding process for the hose shoulder according to claim 1, characterized in that: A glue inlet is provided between the glue inlet flow channel and the mold cavity and is communicated through the glue inlet. The diameter of the glue inlet is a preset value A, and the value range of the preset value A is: 0.3mm≤A≤0.5mm.

4. The injection molding process for the hose shoulder according to claim 1, characterized in that: In the injection molding step, the injection stroke of the mold is controlled in sections, which are the first injection stroke, the second injection stroke and the third injection stroke respectively. In the first injection stroke, the injection pressure adopted by the injection molding machine is a preset value F1, and the injection speed is a preset value S1. In the second injection stroke, the injection pressure adopted by the injection molding machine is a preset value F2, and the injection speed is a preset value S2. In the third injection stroke, the injection pressure adopted by the injection molding machine is a preset value F3, and the injection speed is a preset value S3, wherein: F1≤F3≤F2, S1≤S3≤S2.

5. The injection molding process for the hose shoulder according to claim 4, characterized in that: The value range of the preset value F1 is: 20MPa≤F1≤40MPa; the value range of the preset value F2 is: 110MPa≤F2≤130MPa; the value range of the preset value F3 is: 50MPa≤F3≤70MPa; the value range of the preset value S1 is: 25mm / s≤S1≤35mm / s; the value range of the preset value S2 is: 75mm / s≤S2≤85mm / s; the value range of the preset value S3 is: 55mm / s≤S3≤65mm / s.

6. The injection molding process for the hose shoulder according to claim 1, characterized in that: After the mold cavity is filled with the rubber material, the rubber material in the mold cavity is maintained at a pressure of the preset value F5. The range of the preset value F5 is: 90MPa≤F5≤110MPa.

7. The injection molding process for the hose shoulder according to claim 1, characterized in that: In the cooling and demolding step, cooling is performed by delivering coolant into the mold, wherein the delivery pressure of the coolant is a preset value F4, the temperature of the coolant is a preset value T, the value range of the preset value F4 is: 0.3MPa≤F4≤0.5MPa, and the value range of the preset value T is: 15℃≤T≤18℃.

8. The injection molding process for the hose shoulder according to claim 1, characterized in that: In the excess material removal step, the stamping direction adopted is parallel to the axis of the tube body and from the inner side of the tube body to the outer side of the discharge port.

9. The injection molding process for the hose shoulder according to claim 8, characterized in that: When the connection structure between the inner wall of the discharge port and the residual material at the nozzle is punched and cut off, a suction device is provided to suck the discharge port.

10. A hose, characterized in that: The hose shoulder is manufactured by the injection molding process according to any one of claims 1 to 9.

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