Modular combination barrel for injection molding machines

Abstract

A modular combination barrel for injection molding machines includes a barrel body with an inlet and an outlet. An inner sleeve is connected to the inner cavity of the barrel corresponding to the inlet. An opening is provided on the side wall of the inner sleeve, communicating with the inlet. A through hole is provided in the middle of the inner sleeve, communicating with the opening and the inner cavity of the barrel. The advantages of this invention are: it can handle the production of various raw materials using only one barrel body and several inner sleeves, reducing initial equipment purchase costs by 40-60% compared to purchasing multiple integral barrels; the inner sleeve, as a consumable part, costs only 20-30% of the integral barrel, and only the inner sleeve needs to be replaced after wear, saving maintenance costs; it greatly reduces downtime caused by changing raw materials or repairing the barrel, making it particularly suitable for flexible production modes with multiple varieties and small batches, significantly improving the overall utilization rate of the equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection molding machine cylinder, in particular to a modular combination cylinder for injection molding machine. BACKGROUND

[0002] Injection molding machine is a key equipment for polymer product forming, which injects plastic raw material into mold after plasticizing by cooperation of cylinder and screw. In the prior art, the cylinder of injection molding machine mostly adopts integral structure, that is, the cylinder is an undetachable whole. The feed inlet and inner wall structure (such as smooth, draw groove, etc.) are designed according to the physical properties (such as friction coefficient, flowability) of specific raw materials. For example, when producing raw materials such as polycarbonate and acrylonitrile-butadiene-styrene copolymer, smooth inner wall is needed to ensure smooth discharge; when producing crystalline raw materials such as nylon, the cylinder inner wall needs to have draw groove structure to enhance the conveying capacity because of low friction coefficient and easy to slip. Therefore, the structure of the existing integral cylinder needs to be further improved. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a modular combination cylinder for injection molding machine, which can replace the cylinder structure of the feed inlet position and save application cost.

[0004] The technical scheme adopted by the present application to solve the above technical problem is as follows: the modular combination cylinder for injection molding machine comprises a cylinder body, a feed inlet and a discharge outlet are arranged on the cylinder body, characterized in that an inner sleeve body is connected in the inner cavity of the cylinder body corresponding to the feed inlet, an inner sleeve body opening is arranged on the side wall of the inner sleeve body, the inner sleeve body opening is communicated with the feed inlet, an inner sleeve body through hole is arranged in the middle of the inner sleeve body, and the inner sleeve body through hole is communicated with the inner sleeve body opening and the inner cavity of the cylinder.

[0005] As an improvement, a connecting groove can be preferably arranged in the inner cavity of the cylinder body corresponding to the feed inlet, the inner sleeve body is inserted in the connecting groove, a cover plate is arranged on the opening of the connecting groove, and the inner sleeve body is clamped between the bottom surface of the connecting groove and the cover plate.

[0006] Further improvement, the inner wall of the inner sleeve body through hole can be preferably flush with the inner wall of the inner cavity of the cylinder.

[0007] Further improvement, the inner wall surface of the inner sleeve body through hole can be preferably provided with a nitriding layer.

[0008] Further improvement, screw holes can be preferably distributed on the end surface of the cylinder body, screw holes are also distributed on the outer edge of the cover plate, and the cover plate and the end surface of the cylinder body are screwed together.

[0009] Further improvement, a cover plate through hole can be preferably arranged in the middle of the cover plate, and the cover plate through hole is communicated with the inner cavity of the cylinder.

[0010] As an improvement, the opening of the inner sleeve can preferably be offset from the feed inlet.

[0011] In a further improvement, the lower sidewall of the inner sleeve opening can preferably be tangent to the outer diameter of the inner sleeve through hole.

[0012] As a further improvement, axial grooves that can increase the frictional force on the material can preferably be distributed circumferentially on the inner wall of the through hole of the inner sleeve.

[0013] In a further improvement, the number of axial grooves can preferably be six, and the six axial grooves can preferably be evenly distributed along the inner wall of the through hole of the inner sleeve.

[0014] Compared with existing technologies, the advantages of this invention are as follows: It can handle the production of various raw materials using only one cylinder and several inner sleeves, reducing initial equipment purchase costs by 40-60% compared to purchasing multiple integral cylinders; the inner sleeves, as consumable parts, cost only 20-30% of the integral cylinder, and only the inner sleeves need to be replaced after wear, saving maintenance costs; it greatly shortens downtime caused by changing raw materials or repairing the cylinder, making it particularly suitable for flexible production modes with multiple varieties and small batches, significantly improving the overall utilization rate of the equipment; each inner sleeve can be optimally designed for specific raw materials, such as adjusting the tank depth and chamfer angle, ensuring the best plasticizing quality and production efficiency, superior to the "compromise" design of integral cylinders; it avoids frequent scrapping of the main cylinder body, conforming to the concepts of green manufacturing and sustainable development. Attached Figure Description

[0015] Figure 1 This is a perspective view of an embodiment of the present invention; Figure 2 for Figure 1 Top view; Figure 3 yes Figure 2 Cross-sectional view along line AA; Figure 4 yes Figure 1 Exploded structural diagram; Figure 5 This is a top view of the second embodiment of the present invention; Figure 6 yes Figure 5 Cross-sectional view along the BB line; Figure 7 yes Figure 5 Cross-sectional view along the CC line; Figure 8 yes Figure 5 Exploded structural diagram; Figure 9 yes Figure 7 Enlarged view of section I. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0017] like Figures 1 to 4 As shown, the modular combination barrel for injection molding machines in this embodiment includes a barrel body 1, with an inlet 11 and an outlet 12 provided on the barrel body 1. An inner sleeve 2 is connected in the inner cavity of the barrel corresponding to the inlet 11. An inner sleeve opening 21 is provided on the side wall of the inner sleeve 2, and the inner sleeve opening 21 communicates with the inlet 11. An inner sleeve through hole is provided in the middle of the inner sleeve 2, and the inner sleeve through hole communicates with the inner sleeve opening 21 and the inner cavity of the barrel.

[0018] A connecting groove is provided in the inner cavity of the cylinder corresponding to the feed inlet 11. The inner sleeve 2 is inserted into the connecting groove, and a cover plate 3 is provided on the opening of the connecting groove. The inner sleeve 2 is sandwiched between the bottom surface of the connecting groove and the cover plate 3. The inner wall of the through hole of the inner sleeve is flush with the inner wall of the inner cavity of the cylinder. A nitrided layer is provided on the inner wall surface of the through hole of the inner sleeve. Threaded holes are distributed on the end face of the cylinder 1, and threaded holes are also distributed on the outer edge of the cover plate 3. The cover plate 3 is screwed together with the end face of the cylinder 1. A cover plate through hole is provided in the middle of the cover plate 3, and the cover plate through hole communicates with the inner cavity of the cylinder.

[0019] like Figures 5 to 9 As shown, the modular combination barrel for injection molding machines in the second embodiment includes a barrel body 1, with an inlet 11 and an outlet 12 provided on the barrel body 1. An inner sleeve 2 is connected in the inner cavity of the barrel corresponding to the inlet 11. An inner sleeve opening 21 is provided on the side wall of the inner sleeve 2, and the inner sleeve opening 21 communicates with the inlet 11. An inner sleeve through hole is provided in the middle of the inner sleeve 2, and the inner sleeve through hole communicates with the inner sleeve opening 21 and the inner cavity of the barrel.

[0020] A connecting groove is provided in the inner cavity of the cylinder corresponding to the feed inlet 11. The inner sleeve 2 is inserted into the connecting groove, and a cover plate 3 is provided on the opening of the connecting groove. The inner sleeve 2 is sandwiched between the bottom surface of the connecting groove and the cover plate 3. The inner wall of the through hole of the inner sleeve is flush with the inner wall of the inner cavity of the cylinder. A nitrided layer is provided on the inner wall surface of the through hole of the inner sleeve. Threaded holes are distributed on the end face of the cylinder 1, and threaded holes are also distributed on the outer edge of the cover plate 3. The cover plate 3 is screwed together with the end face of the cylinder 1. A cover plate through hole is provided in the middle of the cover plate 3, and the cover plate through hole communicates with the inner cavity of the cylinder.

[0021] The inner sleeve opening 21 is offset from the feed inlet 11. The lower sidewall 211 of the inner sleeve opening 21 is tangent to the outer diameter of the inner sleeve through hole. Axial grooves 22, which increase the frictional force on the material, are circumferentially distributed on the inner wall of the inner sleeve through hole. There are six axial grooves 22, which are evenly distributed along the inner wall of the inner sleeve through hole.

Claims

1. A modular assembly barrel for use in an injection molding machine, comprising a barrel body (1), wherein a feed inlet (11) and a discharge outlet (12) are provided on the barrel body (1), characterized in that: An inner sleeve (2) is connected in the inner cavity of the cylinder corresponding to the feed port (11). An inner sleeve opening (21) is provided on the side wall of the inner sleeve (2). The inner sleeve opening (21) is connected to the feed port (11). An inner sleeve through hole is provided in the middle of the inner sleeve (2). The inner sleeve through hole is connected to the inner sleeve opening (21) and the inner cavity of the cylinder.

2. The modular combined barrel according to claim 1, characterized in that: A connecting groove is provided in the inner cavity of the cylinder corresponding to the feed inlet (11), the inner sleeve (2) is inserted into the connecting groove, a cover plate (3) is provided on the opening of the connecting groove, and the inner sleeve (2) is sandwiched between the bottom surface of the connecting groove and the cover plate (3).

3. The modular combined barrel according to claim 2, characterized in that: The inner wall of the inner sleeve through hole is flush with the inner wall of the inner cavity of the barrel.

4. The modular combined barrel according to claim 3, characterized in that: The inner wall surface of the through hole of the inner sleeve is provided with a nitrided layer.

5. The modular combined barrel according to claim 2, characterized in that: Threaded holes are distributed on the end face of the cylinder (1), and threaded holes are also distributed on the outer edge of the cover plate (3). The cover plate (3) is screwed together with the end face of the cylinder (1).

6. The modular combined barrel according to claim 5, characterized in that: The cover plate (3) has a cover plate through hole in the middle, and the cover plate through hole is connected to the inner cavity of the barrel.

7. The modular combined barrel according to any one of claims 1 to 6, characterized in that: The inner sleeve opening (21) is offset from the feed inlet (11).

8. The modular combined barrel according to claim 7, characterized in that: The lower sidewall (211) of the inner sleeve opening (21) is tangent to the outer diameter of the inner sleeve through hole.

9. The modular combined barrel according to claim 7, characterized in that: Axial grooves (22) that increase the friction force on the material are distributed circumferentially on the inner wall of the inner sleeve through hole.

10. The modular combined barrel according to claim 9, characterized in that: The number of axial grooves (22) is six, and the six axial grooves are evenly distributed along the inner wall of the inner sleeve through hole.

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