Injection mechanism and moulding press

Abstract

The utility model discloses an injection mechanism and mould pressing forming machine relates to injection moulding equipment technical field, wherein, injection mechanism includes the cylinder; Injection plunger is installed on the cylinder, reversely movablely set in the cylinder, plunger head is connected to the reverse piece, when the reverse piece controls the first runner and the second runner flow, the third runner is formed between plunger head and injection plunger, and the second runner and the third runner flow, when the reverse piece cuts off the first runner and the second runner flow, the plunger head and injection plunger are closed, and the plunger head closes the second runner, the technical effect of the utility model provides technical scheme, and the side of plunger head is close to injection plunger and is attached to the outer wall of injection plunger, can improve the contact area of reverse piece and injection plunger, improve the compression resistance of reverse piece and injection plunger.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, and in particular to an injection mechanism and a compression molding machine. Background Technology

[0002] Currently, check valves in rubber compression molding machines are installed inside the injection mechanism. These check valves ensure unidirectional flow of the rubber compound from the plasticizing mechanism to the injection mechanism, guaranteeing the stability and accuracy of the injection process. However, the pressure resistance of existing check valves in rubber compression molding machines is poor and cannot meet user needs. Utility Model Content

[0003] The main purpose of this invention is to provide an injection mechanism and a molding machine, which aims to improve the pressure resistance of the check valve.

[0004] To achieve the above objectives, the present invention proposes an injection mechanism comprising: a barrel; an injection plunger mounted on the barrel; a check valve movably disposed within the barrel to control the flow between a first flow channel within the barrel and a second flow channel within the injection plunger; and a plunger head connected to the check valve. When the check valve controls the flow between the first and second flow channels, a third flow channel is formed between the plunger head and the injection plunger, and the second flow channel flows through the third flow channel. When the check valve blocks the flow between the first and second flow channels, the plunger head closes to the injection plunger, and the plunger head seals the second flow channel.

[0005] In one embodiment, the plunger head has a first plane on the side near the injection plunger, and the injection plunger has a second plane on the side opposite to the first plane. The plunger head is attached to the second plane through the first plane so that the plunger head is attached to the injection plunger.

[0006] In one embodiment, the outer diameter of the first plane is larger than the outer diameter of the second plane.

[0007] In one embodiment, the check valve includes a first connecting section and a second connecting section connected to each other. The first connecting section is slidably disposed in the first flow channel, and the second connecting section passes through the second flow channel and is connected to the plunger head.

[0008] In one embodiment, the outer wall of the anti-reverse component is provided with a plurality of sliding portions, and the anti-reverse component is slidably disposed in the first flow channel through the sliding portions, and the plurality of sliding portions are arranged at intervals along the circumference of the anti-reverse component.

[0009] In one embodiment, a groove is formed between two adjacent sliding portions, and the inner wall of the groove and the inner wall of the first flow channel form a conveying channel communicating with the first flow channel.

[0010] In one embodiment, the inner wall of the first flow channel has a first guide surface, and the outer wall of the sliding part has a second guide surface, wherein the sliding part slides in cooperation with the first guide surface through the second guide surface.

[0011] In one embodiment, the inner wall of the first flow channel on the side opposite to the plunger head has a first force-bearing surface, and the sliding part has a second force-bearing surface. The first force-bearing surface is in contact with the second force-bearing surface to restrict the sliding of the anti-reverse component.

[0012] In one embodiment, the check valve is threadedly connected to the plunger head.

[0013] This utility model also proposes a compression molding machine, including an embodiment of the injection mechanism as described in any of the above.

[0014] The technical solution of this utility model employs a plunger head that fits against the outer wall of the injection plunger to prevent the rubber material transported from the third flow channel to the storage cavity from flowing back into the second flow channel. This also increases the contact area between the plunger head and the injection plunger, improving their compressive strength and enabling them to withstand the high pressure generated during injection molding in a compression molding machine, thereby extending the service life of the injection mechanism. When the anti-reverse component controls the connection between the first and second flow channels, a third flow channel is formed between the plunger head and the outer wall of the injection plunger. This third flow channel is connected to the second flow channel, allowing the rubber material to be transported into the storage cavity through an annular discharge method, thus improving the conveying efficiency of the rubber material. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A schematic diagram of an embodiment of the injection mechanism provided by this utility model;

[0017] Figure 2 This is a structural cross-sectional view of an embodiment of the injection mechanism provided by this utility model.

[0018] Explanation of icon numbers:

[0019] 1. Barrel; 11. First flow channel; 111. First guide surface; 2. Injection plunger; 21. Second flow channel; 22. Second plane; 23. First force-bearing surface; 3. Check valve; 31. First connecting section; 32. Second connecting section; 33. Sliding part; 331. Groove; 332. Second guide surface; 333. Second force-bearing surface; 4. Plunger head; 41. Third flow channel; 42. First plane.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] This utility model proposes an injection mechanism.

[0025] Please see Figures 1 to 2In one embodiment of this utility model, the injection mechanism includes a barrel 1, an injection plunger 2, and a check valve 3. The injection plunger 2 is mounted on the barrel 1. The check valve 3 is movably disposed within the barrel 1, controlling the flow between the first flow channel 11 within the barrel 1 and the second flow channel 21 within the injection plunger 2. The plunger head 4 is connected to the check valve 3. When the check valve 3 controls the flow between the first flow channel 11 and the second flow channel 21, a third flow channel 41 is formed between the plunger head 4 and the injection plunger 2, and the second flow channel 21 flows through the third flow channel 41. When the check valve 3 blocks the flow between the first flow channel 11 and the second flow channel 21, the plunger head 4 closes the connection between the plunger head 4 and the injection plunger 2, and the plunger head 4 seals the second flow channel 21.

[0026] The technical solution of this utility model adopts a plunger head 4 that is close to the outer wall of the injection plunger 2 to prevent the rubber material transported from the third flow channel 41 to the storage cavity from flowing back into the second flow channel 21. This also increases the contact area between the plunger head 4 and the injection plunger 2, improves their compressive strength, and enables them to withstand the high pressure generated during injection molding in the compression molding machine, thereby increasing the service life of the injection mechanism. When the check valve 3 controls the connection between the first flow channel 11 and the second flow channel 21, a third flow channel 41 is formed between the plunger head 4 and the outer wall of the injection plunger 2. The third flow channel 41 is connected to the second flow channel 21, allowing the rubber material to be transported into the storage cavity through an annular discharge method, thereby improving the conveying efficiency of the rubber material.

[0027] In this embodiment, the end of the barrel 1 facing away from the injection plunger 2 can be connected to a feeding assembly for conveying molten rubber, so that the molten rubber is conveyed into the first flow channel 11. The rubber in the first flow channel 11 can be conveyed to the storage cavity of the compression molding machine through the second flow channel 21 and the third flow channel 41, thus facilitating the conveying of the rubber to the storage cavity. The injection mechanism includes a plasticizing state and an injection molding state. In the plasticizing state, when the flow of the first flow channel 11 and the second flow channel 21 is controlled by the check valve 3, a third flow channel 41 is formed between the outer wall of the plunger head 4 near the injection plunger 2 and the outer wall of the injection plunger 2. The rubber can be conveyed to the storage cavity of the compression molding machine in sequence through the first flow channel 11, the second flow channel 21 and the third flow channel 41, ensuring that the rubber can be smoothly conveyed to the storage cavity. The rubber is discharged in a ring-shaped manner through the third flow channel 41, which can improve the conveying efficiency of the rubber. In injection molding operation, the flow through the first flow channel 11 and the second flow channel 21 is blocked by the check ring 3, so that the outer wall of the injection plunger 2 is in contact with the outer wall of the plunger head 4 near the injection plunger 2, thereby closing the second flow channel 21 and the third flow channel 41 respectively. This prevents the rubber material in the storage cavity from flowing back into the second flow channel 21 and prevents the rubber material in the second flow channel 21 from continuing to be delivered into the storage cavity, thus improving the accuracy of rubber material delivery to the storage cavity. This application directly contacts the outer wall of the injection plunger 2 near the plunger head 4 with the outer wall of the plunger head 4 near the injection plunger 2. Compared with existing injection mechanisms that use a check ring and a steel ball, this application can increase the contact area between the plunger head 4 and the injection plunger 2, thereby improving the pressure resistance of the plunger head 4 and the injection plunger 2, and enabling the injection mechanism to work effectively for a long time under high pressure. In one embodiment, the outer wall surface of the injection plunger 2 near the plunger head 4 is directly attached to the outer wall surface of the plunger head 4 near the injection plunger 2, so that the injection mechanism can withstand an injection pressure of not less than 300 MPa and not more than 350 MPa.

[0028] In this embodiment, the check valve 3 is slidably disposed within the first flow channel 11 along the axial direction of the first flow channel 11. The check valve 3 guides the plunger head 4 to reciprocate along the axial direction of the first flow channel 11, making it easier for the check valve 3 to stop or open the flow between the first flow channel 11 and the second flow channel 21. The outer diameter of the check valve 3 can be smaller than the outer diameter of the plunger head 4. The plunger head 4 is disposed at the end of the check valve 3 away from the barrel 1, and the plunger head 4 is located outside the injection plunger 2, so that when the check valve 3 stops the flow between the first flow channel 11 and the second flow channel 21, the outer wall of the injection plunger 2 fits against the outer wall of the plunger head 4.

[0029] like Figure 2As shown, in one embodiment, the plunger head 4 has a first plane 42 on the side near the injection plunger 2, and the injection plunger 2 has a second plane 22 on the side opposite to the first plane 42. The plunger head 4 is attached to the second plane 22 through the first plane 42 so that the plunger head 4 is attached to the injection plunger 2.

[0030] In this embodiment, the outer wall surfaces of the plunger head 4 and the injection plunger 2 are respectively set as a first plane 42 and a second plane 22. The plunger head 4 fits against the second plane 22 on the injection plunger 2 through the first plane 42, so that the injection pressure received by the plunger head 4 is transmitted to the injection plunger 2 more evenly, thereby increasing the force-bearing area of ​​the plunger head 4 and the injection plunger 2, and further improving the pressure resistance of the plunger head 4 and the injection plunger 2.

[0031] like Figure 2 As shown, in one embodiment, the outer diameter of the first plane 42 is larger than the outer diameter of the second plane 22.

[0032] In this embodiment, since the plunger head 4 needs to reciprocate along the axial direction of the second flow channel 21, this application adopts a first plane 42 with an outer diameter larger than the second plane 22, so that the area of ​​the first plane 42 is larger than the area of ​​the second plane 22, thereby avoiding misalignment between the first plane 42 and the second plane 22 during the fitting process, which would result in a loose fit. As a result, the first plane 42 fits more stably with the second plane 22.

[0033] like Figure 1 and Figure 2 As shown, in one embodiment, the check valve 3 includes a first connecting section 31 and a second connecting section 32 connected to each other. The first connecting section 31 is slidably disposed in the first flow channel 11, and the second connecting section 32 passes through the second flow channel 21. The second connecting section 32 is connected to the plunger head 4.

[0034] In this embodiment, the check valve 3 includes a first connecting section 31 for guiding the check valve 3 along the axial direction of the flow channel and a second connecting section 32 for connecting the plunger head 4. The first connecting section 31 connects to the second connecting section 32. In this application, the first connecting section 31 is slidably disposed within the first flow channel 11, and the axial direction of the first flow channel 11 can be set to be consistent with the axial direction of the second flow channel 21, making it easier for the first connecting section 31 to guide the check valve 3 to slide back and forth along the axial direction of the first flow channel 11. In this application, the second connecting section 32 connects to the plunger head 4, making it easier for the first connecting section 31 to drive the plunger head 4 to slide back and forth during the sliding process.

[0035] like Figure 1As shown, in one embodiment, the outer wall of the anti-reverse member 3 is provided with a plurality of sliding portions 33. The anti-reverse member 3 is slidably disposed in the first flow channel 11 through the sliding portions 33. The plurality of sliding portions 33 are arranged at intervals along the circumference of the first connecting section 31. Two adjacent sliding portions 33 and the inner wall of the first flow channel 11 enclose each other to form a conveying channel communicating with the second flow channel 21.

[0036] In this embodiment, to improve the stability of the anti-reverse component 3 sliding within the first flow channel 11, the outer wall of the first connecting section 31 may be provided with multiple sliding portions 33, and the first connecting section 31 is slidably disposed within the first flow channel 11 via the sliding portions 33. To prevent the first connecting section 31 from obstructing the conveying of the adhesive from the first flow channel 11 to the second flow channel 21, the multiple sliding portions 33 are spaced apart circumferentially along the first connecting section 31, and a groove 331 may be formed between two adjacent sliding portions 33. The two adjacent sliding portions 33, the groove 331, and the inner wall of the first flow channel 11 enclose and form a conveying channel communicating with the second flow channel 21, so that the adhesive in the first flow channel 11 can be conveyed to the second flow channel 21 via the conveying channel.

[0037] like Figure 1 and Figure 2 As shown, in one embodiment, the inner wall of the first flow channel 11 has a first guide surface 111, and the outer wall of the sliding part 33 has a second guide surface 332. The sliding part 33 slides with the first guide surface 111 through the second guide surface 332 so that the anti-reverse member 3 can slide back and forth in the first flow channel 11.

[0038] In this embodiment, the first guide surface 111 and the second guide surface 332 are both provided as arc surfaces to reduce the friction of the sliding part 33 sliding in the first flow channel 11, thereby making it easier for the anti-reverse member 3 to slide in the first flow channel 11.

[0039] In one embodiment, the length of the first guide surface 111 is greater than the length of the second guide surface 332 in the direction along the axial direction of the second flow channel 21, so as to form a sliding space in the first flow channel 11 for the sliding part 33 to slide.

[0040] like Figure 2 As shown, in one embodiment, the inner wall of the first flow channel 11 on the side opposite to the plunger head 4 has a first force-bearing surface 23, and the sliding part 33 has a second force-bearing surface 333. The first force-bearing surface 23 is in contact with the second force-bearing surface 333 to restrict the sliding of the anti-reverse member 3.

[0041] In this embodiment, the inner wall of the first flow channel 11 on the side away from the plunger head 4 has a first force-bearing surface 23, and the sliding part 33 on the side opposite to the first force-bearing surface 23 has a second force-bearing surface 333. When the check valve 3 slides to the point of blocking the flow of the first flow channel 11 and the second flow channel 21, this application restricts the check valve 3 from continuing to slide toward the side away from the barrel 1 by having the first force-bearing surface 23 on the first flow channel 11 adhere to the second force-bearing surface 333 on the sliding part 33.

[0042] In one embodiment, the check valve 3 is threadedly connected to the plunger head 4.

[0043] In this embodiment, when the plunger head 4 is damaged, the user can remove the plunger head 4 from the check valve 3 to replace the intact plunger head 4, thereby reducing the maintenance cost of the injection mechanism.

[0044] This utility model also proposes a compression molding machine, which includes an injection mechanism. The specific structure of the injection mechanism is as described in the above embodiments. Since this compression molding machine adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. In this embodiment, the compression molding machine can be an injection molding machine, a rubber injection molding machine, a magnesium alloy injection molding machine, or other equipment.

[0045] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An injection mechanism characterized by, include: Material cylinder; An injection plunger is installed on the barrel; A check valve is movably disposed inside the barrel to control the flow between the first flow channel inside the barrel and the second flow channel inside the injection plunger; A plunger head is connected to the check valve. When the check valve controls the flow of the first and second flow channels, a third flow channel is formed between the plunger head and the injection plunger, and the second flow channel flows through the third flow channel. When the check valve blocks the flow of the first and second flow channels, the plunger head and the injection plunger are closed, and the plunger head closes the second flow channel.

2. The injection mechanism of claim 1, wherein The plunger head has a first plane on the side near the injection plunger, and the injection plunger has a second plane on the side opposite to the first plane. The plunger head fits against the second plane through the first plane so that the plunger head fits against the injection plunger.

3. The injection mechanism of claim 2, wherein The outer diameter of the first plane is larger than the outer diameter of the second plane.

4. The injection mechanism of claim 1, wherein The check valve includes a first connecting section and a second connecting section that are connected to each other. The first connecting section is slidably disposed in the first flow channel, and the second connecting section passes through the second flow channel and is connected to the plunger head.

5. The injection mechanism of claim 1, wherein The outer wall of the anti-reverse component is provided with a plurality of sliding portions, and the anti-reverse component is slidably disposed in the first flow channel through the sliding portions, and the plurality of sliding portions are arranged at intervals along the circumference of the anti-reverse component.

6. The injection mechanism of claim 5, wherein A groove is formed between two adjacent sliding parts, and the inner wall of the groove and the inner wall of the first flow channel form a conveying channel communicating with the first flow channel.

7. The injection mechanism of claim 5, wherein The inner wall of the first flow channel has a first guide surface, and the outer wall of the sliding part has a second guide surface. The sliding part slides in cooperation with the first guide surface through the second guide surface.

8. The injection mechanism of claim 5, wherein The inner wall of the first flow channel on the side opposite to the plunger head has a first force-bearing surface, and the sliding part has a second force-bearing surface. The first force-bearing surface is in contact with the second force-bearing surface to restrict the sliding of the anti-reverse component.

9. The injection mechanism of claim 1, wherein The check valve is threadedly connected to the plunger head.

10. A compression molding machine characterized by comprising: Includes the injection mechanism as described in any one of claims 1 to 9.

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