Detection mechanism for injection molding glue barrel

By designing an integrated detection mechanism, including airtight detection, tightening and cooling components, the problem of cooling and airtight detection of injection molded rubber drums is solved in steps, and operation simplification and detection efficiency are improved.

CN222481760UActive Publication Date: 2025-02-14DONG GUAN SHI MING FENG IND LTD CO
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Patent Information

Application Number
CN202421118775.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-21
Publication Date
2025-02-14
Estimated Expiration
2034-05-21

AI Technical Summary

Technical Problem

In the prior art, injection molded plastic barrels require step-by-step cooling and airtightness detection, resulting in complex operation and requiring two operators, which are inefficient.

Method used

Design an integrated detection mechanism, including airtightness detection components, tightening components and cooling components. By fixing the glue barrel with the tightening components, the cooling components quickly cool down and detect them through the airtightness detection components. An integrated design Reduced steps.

Benefits of technology

The cooling of the rubber barrel and the integration of the airtightness detection process are realized, the operation process is simplified, the detection efficiency is improved, and the demand for manual operation is reduced.

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Patent Text Reader

Abstract

The utility model relates to a detection mechanism for injection molding of a glue barrel, the detection mechanism comprises a rack, and an air tightness detection assembly, an abutting assembly and a cooling assembly which are sequentially arranged on the rack, the rack is used for placing the glue barrel, the air tightness detection assembly is used for carrying out air tightness detection on the glue barrel, and the abutting assembly is used for abutting against the glue barrel; the abutting assembly is used for abutting against the glue barrel placed on the rack, the cooling assembly is used for cooling the glue barrel, and the glue barrel detection device has the effect of improving the detection efficiency of the glue barrel.
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Description

Technical Field

[0001] The present application relates to the field of rubber barrel production, and in particular to a detection mechanism for injection molding rubber barrels. Background Art

[0002] Plastic barrels are light and easy to carry, corrosion-resistant, durable, low-cost and highly plastic. They are suitable for various occasions, such as household storage, industrial raw material storage, agricultural use, chemical transportation, etc., and can meet different needs through different designs and material selections. They are a multifunctional container.

[0003] Because the temperature of the plastic barrel after injection molding by the injection molding machine is still relatively high, the plastic barrel needs to be cooled down after injection molding. At the same time, due to the deviation in the fit between the male and female molds of the injection mold and other components, there may be air holes in the plastic barrel after injection molding. Therefore, after the temperature of the plastic barrel is cooled down, the plastic barrel needs to be tested for air tightness.

[0004] In actual application, the operator must first cool down the glue barrel, and then use an airtightness detection device to test the glue barrel for airtightness, so that the glue barrel meets the design requirements; the cooling process and the airtightness detection process are carried out step by step, which requires two operators to perform step-by-step operations at the same time. The process is complicated and there is room for improvement. Utility Model Content

[0005] In order to improve the detection efficiency of the glue barrel, the present application provides a detection mechanism for the injection molding glue barrel.

[0006] The present application provides a detection mechanism for injection molding plastic barrels using the following technical solutions:

[0007] A detection mechanism for injection molding glue barrels, comprising a frame and an air tightness detection component, a tightening component and a cooling component sequentially arranged on the frame, the frame is used to place the glue barrel, the air tightness detection component is used to perform air tightness detection on the glue barrel, the tightening component is used to tighten the glue barrel placed on the frame, and the cooling component is used to cool the glue barrel.

[0008] By adopting the above technical scheme, the glue barrel placed on the rack is pressed against by the pressing component to reduce the position deviation of the glue barrel when placed on the rack. At the same time, the glue barrel is cooled by the cooling component to quickly reduce its temperature. The sealing performance of the glue barrel is tested by the air-tightness detection component to facilitate the removal of unqualified glue barrels. The cooling process of the glue barrel and the air-tightness detection process are integrated in the same detection device without the need to be performed step by step, which plays a positive guiding role in improving the detection efficiency of the glue barrel.

[0009] Preferably, the air tightness detection component includes an air pressure detection sensor and a sealing piece, the sealing piece is arranged on the frame, the sealing piece is used to seal the barrel opening of the rubber barrel, the sealing piece is externally connected to a detection device, the air pressure detection sensor is arranged on the sealing piece, when the sealing piece seals the barrel opening of the rubber barrel, the air pressure detection sensor is in the rubber barrel, and the air pressure detection sensor is electrically connected to the detection device.

[0010] By adopting the above technical scheme, the mouth of the rubber barrel is sealed by the sealing member, which is conducive to reducing the amount of gas leaking along the through hole of the rubber barrel when the detection device is performing airtightness detection on the rubber barrel, and plays a positive guiding role in improving the accuracy of the rubber barrel sealing detection result. At the same time, the air pressure in the rubber barrel is detected in real time by the air pressure detection sensor, which is conducive to reducing the probability of deformation or bursting of the rubber barrel due to excessive air pressure of the gas filled in the rubber barrel. In addition, the air pressure detection sensor can monitor the change of air pressure in the rubber barrel. When the instantaneous air pressure change in the rubber barrel is large, it indicates that the rubber barrel may have air holes or cracks, which is conducive to further improving the airtightness detection result of the rubber barrel.

[0011] Preferably, an annular groove is provided on the surface where the sealing member abuts against the mouth of the rubber barrel, and the contour of the annular groove is adapted to the contour of the mouth of the rubber barrel. When the rubber barrel is placed on the frame, the mouth of the rubber barrel is located in the annular groove.

[0012] By adopting the above technical solution, the position of the rubber barrel when placed on the frame is limited by the annular groove. At the same time, the gap between the sealing member and the barrel mouth of the rubber barrel is filled by the annular groove, which is helpful to reduce the amount of gas leakage along the barrel mouth.

[0013] Preferably, a sealing member is provided in the annular groove, and the sealing member is configured as a silicone sealing member.

[0014] By adopting the above technical solution, the silicone material has the characteristics of being soft and easy to deform. When the rubber barrel is placed on the frame and the mouth of the rubber barrel is located in the annular groove, the mouth of the rubber barrel abuts against the seal, and the seal further fills the gap between the mouth of the rubber barrel and the annular groove, thereby further reducing the amount of gas leakage and playing a positive guiding role in improving the detection results.

[0015] Preferably, the clamping assembly includes a driving member and a clamping plate, the clamping plate is slidably arranged on the frame along the vertical direction, the driving member is arranged on the frame, the clamping plate is connected to the driving member, the driving member is used to drive the clamping plate to press against / or away from the bottom of the rubber barrel, and the driving member is electrically connected to the detection device.

[0016] By adopting the above technical solution, when the rubber barrel is placed on the rack, the detection device can issue a control instruction to control the driving part to drive the clamping plate close to the bottom of the rubber barrel. When the rubber barrel needs to be taken out along the rack, the controller controls the driving part to drive the clamping plate away from the bottom of the rubber barrel, and there is no need to manually complete the clamping operation of the rubber barrel, which is highly practical.

[0017] Preferably, a positioning assembly is provided on the frame, and the positioning assembly includes a plurality of positioning rods, and the plurality of positioning rods are arranged in a triangular array on the frame, and the plurality of positioning rods are arranged on the frame along a vertical direction. When the rubber barrel is placed on the frame, the plurality of positioning rods abut against the side wall of the rubber barrel.

[0018] By adopting the above technical solution, the positioning of the rubber barrel is achieved by means of a plurality of positioning rods. At the same time, a certain support effect is provided to the rubber barrel by means of a plurality of positioning rods, which is beneficial to reduce the probability of deformation of the rubber barrel due to excessive gas filling into the rubber barrel while the side wall of the rubber barrel is in an unsupported state.

[0019] Preferably, a waist-shaped groove is provided on the positioning rod, and the waist-shaped groove is used to adjust the distance between the positioning rod and the glue barrel.

[0020] By adopting the above technical solution, the distance between the positioning rod and the glue barrel can be adjusted through the waist-shaped groove to meet the positioning requirements of glue barrels of different sizes, which is highly practical.

[0021] Preferably, sliding members are arranged in a rectangular array on the lower surface of the frame.

[0022] By adopting the above technical solution, the rack can be slid to any location through the sliding member, which has high flexibility.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The cooling process of the rubber barrel and the air tightness detection process are integrated on the same detection device, without the need to be carried out step by step, which plays a positive guiding role in improving the detection efficiency of the rubber barrel;

[0025] 2. The air pressure in the plastic barrel is detected in real time through the air pressure detection sensor, which is helpful to reduce the probability of deformation or explosion of the plastic barrel due to excessive air pressure in the plastic barrel;

[0026] 3. The seal is used to further fill the gap between the mouth of the rubber barrel and the annular groove, further reducing the amount of gas leakage, which plays a positive guiding role in improving the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is a schematic diagram of the overall structure of a detection mechanism for an injection molding rubber barrel according to an embodiment of the present application.

[0028] Figure 2 yes Figure 1 A schematic structural diagram from another perspective of a detection mechanism for an injection molding rubber barrel.

[0029] Figure 3 yes Figure 1 An enlarged schematic diagram of part A of a detection mechanism for an injection molding plastic barrel.

[0030] Figure 4 It is a structural schematic diagram of a tightening part in a detection mechanism for an injection molding rubber barrel of the present application.

[0031] Figure 5 This is a system principle block diagram of a pressure detection sensor, a detection device and a driving cylinder in a detection mechanism for an injection molding rubber barrel in the present application.

[0032] Explanation of the accompanying drawings: 1. Frame; 2. Air tightness detection assembly; 21. Air pressure detection sensor; 22. Sealing piece; 221. Plug-in portion; 222. Tightening portion; 3. Tightening assembly; 31. Driving member; 311. Driving cylinder; 32. Tightening disk; 4. Cooling assembly; 41. First cooling fan; 42. Second cooling fan; 5. Annular groove; 6. Sealing piece; 7. Positioning assembly; 71. Positioning rod; 8. Waist-shaped groove; 9. Sliding piece; 91. Self-locking universal wheel; 10. Guide rod; 11. Support plate. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 This application is described in further detail.

[0034] The present application embodiment discloses a detection mechanism for injection molding plastic barrels. Figure 1-Figure 3 A detection mechanism for an injection molding rubber barrel includes a frame 1 and an airtightness detection component 2, a tightening component 3 and a cooling component 4 which are sequentially arranged on the frame 1. The frame 1 is used to place the rubber barrel, the airtightness detection component 2 is used to perform airtightness detection on the rubber barrel, the tightening component 3 is used to tighten the rubber barrel placed on the frame 1, and the cooling component 4 is used to cool the rubber barrel.

[0035] The implementation principle of the detection mechanism for injection molding rubber barrels in the embodiment of the present application is as follows: the rubber barrel placed on the frame 1 is pressed against by the pressing component 3 to reduce the position deviation of the rubber barrel when placed on the frame 1; at the same time, the rubber barrel is cooled by the cooling component 4 to quickly reduce its temperature; the sealing performance of the rubber barrel is detected by the air-tightness detection component 2 to facilitate the removal of unqualified rubber barrels; the cooling process of the rubber barrel and the air-tightness detection process are integrated in the same detection device without the need to be performed step by step, which plays a positive guiding role in improving the detection efficiency of the rubber barrel.

[0036] Reference Figure 3 The air tightness detection component 2 includes an air pressure detection sensor 21 and a sealing member 22. The sealing member 22 is arranged on the frame 1. The sealing member 22 is used to seal the barrel mouth of the rubber barrel. The sealing member 22 is externally connected to a detection device. The air pressure detection sensor 21 is arranged on the sealing member 22. When the sealing member 22 seals the barrel mouth of the rubber barrel, the air pressure detection sensor 21 is in the rubber barrel, and the air pressure detection sensor 21 is electrically connected to the detection device.

[0037] Specifically, refer to Figure 4 The outer contour of the sealing member 22 is set to be cylindrical, and the cross-sectional shape is set to be T-shaped, forming a plug-in portion 221 and a tightening portion 222. The diameter of the plug-in portion 221 is smaller than the diameter of the tightening portion 222. At the same time, in this embodiment, the plug-in portion 221 and the tightening portion 222 are integrally formed by machine tool processing of aluminum material, and are fixed to the frame 1 by bolts, so as to facilitate the replacement of plugging members 22 of different sizes to meet the sealing requirements of the mouths of rubber barrels of different calibers, so as to improve the stability of the plugging member 22 and reduce the risk of breakage at the connection between the plug-in portion 221 and the tightening portion 222.

[0038] At the same time, the diameter of the plug-in portion 221 is transitionally matched with the diameter of the barrel mouth of the plastic barrel, so that the plastic barrel can be smoothly taken out or inserted along the plug-in portion 221. When the plastic barrel is inserted into the plug-in portion 221 along the barrel mouth, the barrel mouth end face of the plastic barrel abuts against the abutting portion 222.

[0039] Correspondingly, the air pressure detection sensor 21 is installed on the end face of the plug-in portion 221. The air pressure detection sensor 21 described here is a conventional air pressure detection component, which is used to detect the change in air pressure. It is an existing component, and its specific composition and working principle will not be described in detail here.

[0040] In addition, refer to Figure 5 The detection device includes a controller, a booster, an inflation pipeline and a human-computer interaction interface. The controller controls the booster to fill the inflation pipeline with air. In this embodiment, the inflation pipeline runs through the plug-in portion 221 and the tightening portion 222. When the plug-in portion 221 is plugged into the mouth of the rubber barrel, the air outlet of the inflation pipeline is located in the rubber barrel, thereby achieving the purpose of pressurization. Its specific composition and working principle are not described in detail here.

[0041] Therefore, by sealing the mouth of the rubber barrel through the sealing member 22, it is beneficial to reduce the amount of gas leaking along the through hole of the rubber barrel when the detection device performs airtightness detection on the rubber barrel, which plays a positive guiding role in improving the accuracy of the rubber barrel sealing detection result. At the same time, the air pressure in the rubber barrel is detected in real time by the air pressure detection sensor 21, which is beneficial to reduce the probability of deformation or bursting of the rubber barrel due to excessive air pressure of the gas filled in the rubber barrel. In addition, the air pressure detection sensor 21 can monitor the change of air pressure in the rubber barrel. When the instantaneous air pressure change in the rubber barrel is large, it indicates that the rubber barrel may have air holes or cracks, which is beneficial to further improve the airtightness detection result of the rubber barrel.

[0042] Continue to refer to Figure 4 An annular groove 5 is provided on the surface where the sealing member 22 abuts against the barrel mouth of the rubber barrel. The contour of the annular groove 5 matches the contour of the barrel mouth of the rubber barrel. When the rubber barrel is placed on the frame 1, the barrel mouth of the rubber barrel is located in the annular groove 5.

[0043] Specifically, the annular groove 5 is formed by the upper surface of the abutting portion 222 being depressed in the thickness direction. At this time, the difference between the inner diameter and the outer diameter of the annular groove 5 is greater than the thickness of the mouth of the rubber barrel, so that the mouth of the rubber barrel can be smoothly taken out or placed along the annular groove 5.

[0044] Thus, the position of the rubber barrel when placed on the frame 1 is limited by the annular groove 5. At the same time, the annular groove 5 fills the gap between the sealing member 22 and the barrel opening of the rubber barrel, which is beneficial to reduce the amount of gas leakage along the barrel opening.

[0045] Correspondingly, a sealing member 6 is arranged in the annular groove 5 . The sealing member 6 is arranged as a silicone sealing member. The outer contour of the sealing member 6 is arranged in a circular ring shape, and the shape of the sealing member 6 is adapted to the contour of the annular groove 5 .

[0046] Therefore, the silicone material is soft and easy to deform. When the rubber barrel is placed on the frame 1 and the mouth of the rubber barrel is located in the annular groove 5, the mouth of the rubber barrel abuts against the seal 6, and the seal 6 further fills the gap between the mouth of the rubber barrel and the annular groove 5, further reducing the amount of gas leakage, which plays a positive guiding role in improving the detection results.

[0047] Reference Figure 1 or Figure 2 The clamping assembly 3 includes a driving member 31 and a clamping plate 32. The clamping plate 32 is slidably arranged on the frame 1 along the vertical direction. The driving member 31 is arranged on the frame 1. The clamping plate 32 is connected to the driving member 31. The driving member 31 is used to drive the clamping plate 32 to clamp against / or away from the bottom of the rubber barrel. The driving member 31 is electrically connected to the detection device.

[0048] Specifically, the driving member 31 can be a motor screw structure to drive the clamping plate 32 to press against / or move away from the bottom of the rubber barrel. In this embodiment, the driving member 31 adopts a driving cylinder 311. The piston rod of the driving cylinder 311 moves in the vertical direction through the frame 1 and is connected to the clamping plate 32. The working state of the driving cylinder 311 is controlled by the detection device, so that the driving cylinder 311 drives the clamping plate 32 to move in the vertical direction.

[0049] At the same time, the piston rod of the driving cylinder 311 is fixedly connected to the clamping plate 32 along the geometric center of the clamping plate 32. The external contour of the clamping plate 32 is set in a rectangular shape, and guide rods 10 are set at the edges of both sides of the clamping plate 32 with respect to the geometric center of the piston rod of the driving cylinder 311. The guide rods 10 are movable in the vertical direction and penetrate the frame 1. The guide rods 10 limit the orientation of the clamping plate 32 when it moves in the vertical direction, thereby reducing the deflection of the clamping plate 32 when it moves in the vertical direction.

[0050] Therefore, when the rubber barrel is placed on the frame 1, the detection device can issue a control instruction to control the driving member 31 to drive the tightening plate 32 to approach the bottom of the rubber barrel, so that the barrel mouth of the rubber barrel and the sealing member 6 fit more closely, and further fill the gap between the barrel mouth of the rubber barrel and the sealing member 6. When the rubber barrel needs to be taken out along the frame 1, the controller controls the driving member 31 to drive the tightening plate 32 away from the bottom of the rubber barrel, and there is no need to manually complete the tightening operation of the rubber barrel. At the same time, when the tightening plate 32 is in contact with the rubber barrel, the tightening plate 32 has a shaping effect on the rubber barrel, so that the rubber barrel maintains a good appearance and is highly practical.

[0051] Reference Figure 2 and Figure 3 A positioning assembly 7 is provided on the frame 1, and the positioning assembly 7 includes a plurality of positioning rods 71, which are arranged in a triangular array on the frame 1, and the plurality of positioning rods 71 ​​are provided on the frame 1 along a vertical direction. When the glue barrel is placed on the frame 1, the plurality of positioning rods 71 ​​abut against the side wall of the glue barrel.

[0052] Specifically, the number of positioning rods 71 ​​can be four, six, eight, etc., and the specific number can be increased or reduced according to actual needs, so as to support any three side walls of the glue barrel placed on the frame 1. In the present embodiment, three positioning rods 71 ​​are provided, and the three positioning rods 71 ​​respectively support three of the side walls of the glue barrel, so that the fourth side wall of the glue barrel is in an unblocked state, so as to facilitate the removal or placement of the glue barrel along the frame 1 along the side where the positioning rods 71 ​​are not provided.

[0053] Therefore, the positioning of the rubber barrel is achieved by the three positioning rods 71. At the same time, the three positioning rods 71 ​​provide a certain support for the rubber barrel, which is beneficial to reduce the probability of deformation of the rubber barrel due to excessive gas filling into the rubber barrel and the side wall of the rubber barrel being in an unsupported state.

[0054] Correspondingly, a waist-shaped groove 8 is provided on the positioning rod 71, and the waist-shaped groove 8 is used to adjust the distance between the positioning rod 71 and the rubber bucket. Since the matching relationship between the three positioning rods 71 ​​and the waist-shaped groove 8 is the same, any one of the positioning rods 71 ​​and the waist-shaped groove 8 is selected for description. The section where the positioning rod 71 abuts against the frame 1 is fixedly connected with a support plate 11. The support plate 11 and the positioning rod 71 are formed by welding to reduce the probability of the support plate 11 falling off along the positioning rod 71. At the same time, the waist-shaped groove 8 is provided along the surface of the support plate 11 and is fixed to the frame 1 by bolts. Through the above process, the distance between the positioning rod 71 and the rubber bucket can be adjusted through the waist-shaped groove 8 to meet the positioning requirements of rubber buckets of different sizes, and the practicability is high.

[0055] Reference Figure 1 or Figure 2 The cooling component 4 includes a first cooling fan 41 and a second cooling fan 42. The first cooling fan 41 and the second cooling fan 42 are symmetrically installed on the frame 1 about the piston rod of the driving cylinder 311. When the rubber barrel is placed on the frame 1, the air outlet surfaces of the first cooling fan 41 and the second cooling fan 42 face the rubber barrel. When the first cooling fan 41 and the second cooling fan 42 are working, the first cooling fan 41 and the second cooling fan 42 quickly take away the residual heat of the rubber barrel after injection molding, thereby reducing the probability of the rubber barrel being broken or deformed due to the excessive temperature of the rubber barrel but the excessive pressure of the gas filled into the rubber barrel.

[0056] Reference Figure 1 or Figure 2 The lower surface of the frame 1 is provided with sliding members 9 in a rectangular array.

[0057] Specifically, the sliding member 9 may be a pulley. In the present embodiment, the sliding member 9 is configured as a self-locking universal wheel 91 . There are four self-locking universal wheels 91 . The four self-locking universal wheels 91 are arranged in a rectangular array and are respectively installed at the corners of the lower surface of the frame 1 .

[0058] Therefore, when the placement position of the detection mechanism needs to be changed, the frame 1 can be slid to any location through the sliding member 9, which is highly flexible. At the same time, the self-locking universal wheel 91 has a lockable feature, so after the detection mechanism is moved to the specified position, the self-locking universal wheel 91 can be locked, so that the detection mechanism can be stably stayed at the specified position, reducing the position offset of the detection mechanism caused by vibration.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A detection mechanism for injection molding plastic barrels, characterized in that: The invention comprises a frame (1), and an air tightness detection component (2), a pressing component (3), and a cooling component (4) which are sequentially arranged on the frame (1); the frame (1) is used for placing a rubber barrel, the air tightness detection component (2) is used for performing air tightness detection on the rubber barrel, the pressing component (3) is used for pressing against the rubber barrel placed on the frame (1), and the cooling component (4) is used for cooling the rubber barrel.

2. The detection mechanism for injection molding plastic barrel according to claim 1, characterized in that: The air tightness detection assembly (2) comprises an air pressure detection sensor (21) and a blocking member (22); the blocking member (22) is arranged on the frame (1); the blocking member (22) is used to block the barrel opening of the rubber barrel; the blocking member (22) is externally connected to a detection device; the air pressure detection sensor (21) is arranged on the blocking member (22); when the blocking member (22) blocks the barrel opening of the rubber barrel, the air pressure detection sensor (21) is in the rubber barrel; and the air pressure detection sensor (21) is electrically connected to the detection device.

3. The detection mechanism for injection molding plastic barrel according to claim 2, characterized in that: An annular groove (5) is provided on the surface of the sealing member (22) abutting against the mouth of the rubber barrel, the contour of the annular groove (5) is matched with the contour of the mouth of the rubber barrel, and when the rubber barrel is placed on the frame (1), the mouth of the rubber barrel is located in the annular groove (5).

4. The detection mechanism for injection molding plastic barrel according to claim 3, characterized in that: A sealing member (6) is arranged in the annular groove (5), and the sealing member (6) is made of a silicone material.

5. The detection mechanism for injection molding plastic barrel according to claim 1, characterized in that: The pressing assembly (3) comprises a driving member (31) and a pressing plate (32); the pressing plate (32) is slidably arranged on the frame (1) in a vertical direction; the driving member (31) is arranged on the frame (1); the pressing plate (32) is connected to the driving member (31); the driving member (31) is used to drive the pressing plate (32) to press against / or away from the bottom of the rubber barrel; and the driving member (31) is electrically connected to the detection device.

6. The detection mechanism for injection molding plastic barrel according to claim 1, characterized in that: The frame (1) is provided with a positioning assembly (7), the positioning assembly (7) comprising a plurality of positioning rods (71), the plurality of positioning rods (71) being arranged on the frame (1) in a triangular array, the plurality of positioning rods (71) being arranged on the frame (1) in a vertical direction, and when the rubber barrel is placed on the frame (1), the plurality of positioning rods (71) abut against the side wall of the rubber barrel.

7. The detection mechanism for injection molding plastic barrel according to claim 6, characterized in that: The positioning rod (71) is provided with a waist-shaped groove (8), and the waist-shaped groove (8) is used to adjust the distance between the positioning rod (71) and the glue barrel.

8. The detection mechanism for injection molding plastic barrel according to claim 1, characterized in that: The lower surface of the frame (1) is provided with sliding members (9) in a rectangular array.