Multi-stage fixing structure of plastic mold

Abstract

The application provides a plastic mold multi-stage fixing structure, relates to the technical field of mold fixing, and is used for fixing after the upper mold and the lower mold are combined. The plastic mold multi-stage fixing structure comprises two protrusions which are respectively installed on the two sides of the upper mold through bolts and two limiting seats which are respectively installed on the two sides of the lower mold through bolts. A slot is formed in one of the protrusions. The two sides of the lower mold are both provided with air cylinders. A first fixing member is connected between the two air cylinders. The first fixing member comprises two L-shaped plates which are respectively installed on the piston rods of the two air cylinders. A connecting plate is connected between the two L-shaped plates. A supporting plate is fixedly connected to the connecting plate. A plug rod is installed on the supporting plate. The position of the plug rod corresponds to the position of the slot. A second fixing member is further connected between the two L-shaped plates. The plug rod is inserted into the slot after the upper mold and the lower mold are combined to fix the upper mold and the lower mold. The second fixing member can further fix the upper mold and the lower mold after the upper mold and the lower mold are combined, so that multi-stage fixing is realized.

Description

Technical Field

[0001] This utility model relates to the field of mold fixing technology, and more specifically, to a multi-level fixing structure for plastic molds. Background Technology

[0002] In the field of plastic mold manufacturing, the closing and fixing of the upper and lower molds is a crucial step in ensuring the molding quality of plastic products. Traditional plastic mold fixing structures mostly employ a single fixing method. This single fixing method has several problems in practical applications. When the mold is subjected to high injection pressure, a single fixing point or method cannot effectively resist the stress generated by the pressure, easily leading to displacement or loosening between the upper and lower molds. This, in turn, affects the dimensional accuracy and surface quality of the plastic products, and may even cause serious consequences such as mold damage. Therefore, we have made improvements and proposed a multi-stage fixing structure for plastic molds. Utility Model Content

[0003] The purpose of this utility model is to address the problem that most existing mold fixing structures use a single fixing method, which is prone to displacement or loosening.

[0004] In order to achieve the above-mentioned objectives, this utility model provides a multi-level fixing structure for plastic molds to improve the above-mentioned problems.

[0005] The application is as follows:

[0006] A multi-stage fixing structure for plastic molds, used for fixing the upper and lower molds after mold closing, includes two protrusions respectively bolted to both sides of the upper mold and two limiting seats respectively bolted to both sides of the lower mold. One of the protrusions has a slot. Cylinders are installed on both sides of the lower mold. A first fixing member connects the two cylinders. The first fixing member includes two L-shaped plates respectively mounted on the piston rods of the two cylinders. A connecting plate connects the two L-shaped plates. A support plate is fixedly connected to the connecting plate. An insert rod is installed on the support plate, and the position of the insert rod corresponds to the position of the slot. A second fixing member also connects the two L-shaped plates.

[0007] As a preferred technical solution of this application, the limiting seat is provided with a groove, which is used to insert into the protrusion after the upper mold and the lower mold are closed.

[0008] As a preferred technical solution of this application, the second fixing member includes a first mounting plate that is bolted to the lower mold, a rotating shaft that is rotatably connected to the first mounting plate via a bearing, a clamping plate that is fixedly connected to the end of the rotating shaft, and a clamping groove that is formed on the clamping plate. A second mounting plate is bolted to the upper mold, and a clamping rod that cooperates with the clamping groove is fixedly connected to the second mounting plate.

[0009] As a preferred technical solution of this application, a baffle is fixedly connected to the end of the lever away from the second mounting plate.

[0010] As a preferred technical solution of this application, the second fixing member further includes a rack connected to the L-shaped plate, the rack meshing with a gear, and the gear being fixedly sleeved on the outer surface of the rotating shaft.

[0011] As a preferred technical solution of this application, a guide is provided between the rack and the first mounting plate.

[0012] As a preferred technical solution of this application, the guide member includes a guide groove formed on the rack, a guide block slidably connected in the guide groove, and the guide block is installed on the side of the first mounting plate.

[0013] As a preferred technical solution of this application, several limiting components are also provided between the upper mold and the lower mold.

[0014] As a preferred technical solution of this application, the limiting component includes a limiting plate that is bolted to the upper mold, the limiting plate having a sliding groove, a limiting rod being inserted and connected in the sliding groove, and the limiting rod being threaded to the lower mold.

[0015] As a preferred technical solution of this application, a safety gap is left between the connecting plate and the lower mold, and the safety gap allows the limiting plate to pass through.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] In the scheme of this application:

[0018] To address the issue that existing mold fixing structures often employ a single fixing method, which can easily lead to displacement or loosening, this application employs a pin that engages with a slot after the upper and lower molds are closed to achieve fixation of the molds. Furthermore, a second fixing component further secures the molds after they are closed, enabling multi-level fixing. This effectively disperses and resists the stress generated by injection pressure after the upper and lower molds are closed, significantly reducing the possibility of displacement or loosening, and greatly improving the stability after mold closing, thus ensuring the dimensional accuracy and surface quality of the plastic products. Attached Figure Description

[0019] Figure 1 A schematic diagram of the multi-stage fixing structure of the plastic mold provided in this application;

[0020] Figure 2 A partial structural diagram of the multi-stage fixing structure of the plastic mold provided in this application;

[0021] Figure 3 A side view of the rack structure of the multi-stage fixing structure of the plastic mold provided in this application;

[0022] Figure 4 The multi-stage fixing structure for plastic molds provided in this application Figure 1 Enlarged structural diagram at point A in the middle.

[0023] The image shows:

[0024] 1. Upper mold; 2. Lower mold; 3. Cylinder; 301. L-shaped plate; 302. Connecting plate; 303. Support plate; 304. Insert rod; 305. Protrusion; 306. Slot; 307. Limiting seat; 308. Groove; 309. Rack; 310. Gear; 311. Rotating shaft; 312. First mounting plate; 313. Clamping plate; 314. Clamping groove; 315. Guide groove; 316. Guide block; 317. Second mounting plate; 318. Clamping rod; 319. Stop plate; 4. Limiting plate; 401. Slide groove; 402. Limiting rod. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0026] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] For an example, please refer to... Figures 1-4A multi-stage fixing structure for plastic molds, used for fixing the upper mold 1 and the lower mold 2 after mold closing, includes two protrusions 305 respectively bolted to both sides of the upper mold 1 and two limiting seats 307 respectively bolted to both sides of the lower mold 2. One of the protrusions 305 has a slot 306. Cylinders 3 are installed on both sides of the lower mold 2. A first fixing member connects the two cylinders 3. The first fixing member includes two L-shaped plates 301 respectively mounted on the piston rods of the two cylinders 3. A connecting plate 302 connects the two L-shaped plates 301. A support plate 303 is fixedly connected to the connecting plate 302. A mounting plate 303 is installed on the support plate 303. The upper mold 1 and lower mold 2 are fixed by inserting the insert rod 304 into the slot 306 after the upper mold 1 and lower mold 2 are closed. The second fixing member is also connected between the two L-shaped plates 301. The application uses the insert rod 304 to connect with the slot 306 after the upper mold 1 and lower mold 2 are closed to fix the upper mold 1 and lower mold 2. The second fixing member can further fix the upper mold 1 and lower mold 2 after they are closed to achieve multi-level fixation. After the upper mold 1 and lower mold 2 are closed, the stress generated by the injection pressure can be effectively dispersed and resisted, which greatly reduces the possibility of displacement or loosening, significantly improves the stability after mold closing, and ensures the dimensional accuracy and surface quality of the plastic products.

[0029] Furthermore, a groove 308 is provided on the limiting seat 307. The groove 308 is used to insert into the protrusion 305 after the upper mold 1 and the lower mold 2 are closed, so as to improve the stability of the upper mold 1 and the lower mold 2 after the mold is closed by the insertion of the groove 308 and the protrusion 305, and reduce the displacement of the upper mold 1 and the lower mold 2.

[0030] Furthermore, the second fixing component includes a first mounting plate 312 bolted to the lower mold 2. A rotating shaft 311 is rotatably connected to the first mounting plate 312 via a bearing. A clamping plate 313 is fixedly connected to the end of the rotating shaft 311. A clamping groove 314 is provided on the clamping plate 313. A second mounting plate 317 is bolted to the upper mold 1. A clamping rod 318 that cooperates with the clamping groove 314 is fixedly connected to the second mounting plate 317. After the upper mold 1 and the lower mold 2 are closed, the clamping plate 313 rotates so that the clamping groove 314 can be inserted into the clamping rod 318, thereby fixing the upper mold 1 and the lower mold 2 after they are closed.

[0031] Furthermore, a baffle 319 is fixedly connected to the end of the lever 318 away from the second mounting plate 317. The baffle 319 can laterally limit the movement of the plate 313 after the slot 314 is connected to the lever 318, thereby improving the stability of the plate 313.

[0032] Furthermore, the second fixing member also includes a rack 309 connected to the L-shaped plate 301. The rack 309 meshes with a gear 310, which is fixedly sleeved on the outer surface of the rotating shaft 311. When the L-shaped plate 301 moves, it can drive the rack 309 to move. The rack 309 can drive the clamping plate 313 to rotate through the gear 310 and the rotating shaft 311.

[0033] Furthermore, a guide is provided between the rack 309 and the first mounting plate 312, which can improve the stability of the rack 309 when it moves horizontally.

[0034] Furthermore, the guide includes a guide groove 315 formed on the rack 309, and a guide block 316 is slidably connected in the guide groove 315. The guide block 316 is installed on the side of the first mounting plate 312. The guide block 316 and the guide groove 315 cooperate with each other to guide the horizontal movement of the rack 309, thereby improving the stability of the horizontal movement of the rack 309.

[0035] Furthermore, several limiting components are provided between the upper mold 1 and the lower mold 2 to further reduce the possibility of misalignment when the upper mold 1 and the lower mold 2 are closed.

[0036] Furthermore, the limiting component includes a limiting plate 4 that is bolted to the upper mold 1. The limiting plate 4 has a groove 401, and a limiting rod 402 is inserted into the groove 401. The limiting rod 402 is threaded to the lower mold 2. The limiting plate 4, the groove 401 and the limiting rod 402 cooperate with each other to limit the lifting and lowering process of the upper mold 1, thereby improving the stability of the lifting and lowering process of the upper mold 1 and reducing the possibility of the upper mold 1 deviating.

[0037] Furthermore, a safety gap is left between the connecting plate 302 and the lower mold 2, which allows the limiting plate 4 to pass through. After the insert rod 304 is inserted into the slot 306, the connecting plate 302 does not contact the limiting plate 4.

[0038] The multi-level fixing structure for plastic molds provided by this utility model is used as follows:

[0039] After the upper mold 1 descends, it closes with the lower mold 2. At this time, the protrusion 305 is inserted into the groove 308. The cylinder 3 drives the insertion rod 304 to move closer to the upper mold 1 through the L-shaped plate 301, the connecting plate 302 and the support plate 303, so that the insertion rod 304 is inserted into the slot 306. At the same time, the L-shaped plate 301 drives the clamping plate 313 to rotate through the rack 309, the gear 310 and the rotating shaft 311, so that the clamping groove 314 is inserted into the clamping rod 318, so as to achieve the fixation after the upper mold 1 and the lower mold 2 are closed.

[0040] When the upper mold 1 and the lower mold 2 are opened, the cylinder 3 drives the insert rod 304 to move away from the upper mold 1 through the L-shaped plate 301, the connecting plate 302 and the support plate 303, so that the insert rod 304 is separated from the slot 306. At the same time, the L-shaped plate 301 drives the clamping plate 313 to rotate through the rack 309, the gear 310 and the rotating shaft 311, so that the clamping slot 314 is separated from the clamping rod 318, thereby releasing the fixation of the upper mold 1 and the lower mold 2 for mold opening.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A multi-stage fixing structure for plastic molds, used for fixing the upper mold (1) and lower mold (2) after mold closing, characterized in that, It includes two protrusions (305) that are bolted to both sides of the upper mold (1) and two limiting seats (307) that are bolted to both sides of the lower mold (2). One of the protrusions (305) has a slot (306). Cylinders (3) are installed on both sides of the lower mold (2). A first fixing member is connected between the two cylinders (3). The first fixing member includes two L-shaped plates (301) that are respectively installed on the piston rods of the two cylinders (3). A connecting plate (302) is connected between the two L-shaped plates (301). A support plate (303) is fixedly connected to the connecting plate (302). A plug rod (304) is installed on the support plate (303). The position of the plug rod (304) corresponds to the position of the slot (306). A second fixing member is also connected between the two L-shaped plates (301).

2. The multi-stage fixing structure for a plastic mold according to claim 1, characterized in that, The limiting seat (307) has a groove (308) which is used to connect with the protrusion (305) after the upper mold (1) and the lower mold (2) are closed.

3. The multi-stage fixing structure for a plastic mold according to claim 2, characterized in that, The second fixing component includes a first mounting plate (312) that is bolted to the lower mold (2). A rotating shaft (311) is rotatably connected to the first mounting plate (312) via a bearing. A clamping plate (313) is fixedly connected to the end of the rotating shaft (311). A clamping groove (314) is provided on the clamping plate (313). A second mounting plate (317) is bolted to the upper mold (1). A clamping rod (318) that cooperates with the clamping groove (314) is fixedly connected to the second mounting plate (317).

4. The multi-stage fixing structure for a plastic mold according to claim 3, characterized in that, A baffle (319) is fixedly connected to the end of the lever (318) away from the second mounting plate (317).

5. The multi-stage fixing structure for a plastic mold according to claim 4, characterized in that, The second fixing member also includes a rack (309) connected to the L-shaped plate (301), the rack (309) meshing with a gear (310), the gear (310) being fixedly sleeved on the outer surface of the rotating shaft (311).

6. The multi-stage fixing structure for a plastic mold according to claim 5, characterized in that, A guide is provided between the rack (309) and the first mounting plate (312).

7. The multi-stage fixing structure for a plastic mold according to claim 6, characterized in that, The guide includes a guide groove (315) formed on the rack (309), and a guide block (316) is slidably connected in the guide groove (315). The guide block (316) is mounted on the side of the first mounting plate (312).

8. The multi-stage fixing structure for a plastic mold according to claim 7, characterized in that, Several limiting components are also provided between the upper mold (1) and the lower mold (2).

9. The multi-stage fixing structure for a plastic mold according to claim 8, characterized in that, The limiting component includes a limiting plate (4) that is bolted to the upper mold (1). The limiting plate (4) has a groove (401) and a limiting rod (402) is inserted into the groove (401). The limiting rod (402) is threaded onto the lower mold (2).

10. A multi-stage fixing structure for a plastic mold according to claim 9, characterized in that, A safety gap is left between the connecting plate (302) and the lower mold (2), and the safety gap allows the limiting plate (4) to pass through.

Images