Tunnel type sliding block core-pulling mold

Abstract

The utility model discloses a tunnel type sliding block core-pulling mold. The tunnel type sliding block core-pulling mold comprises an upper mold plate and a lower mold plate, a forming protruding block is installed on the lower die plate, and a tunnel type sliding block core pulling assembly is installed on the forming protruding block. The tunnel type sliding block core pulling assembly comprises a tunnel sliding block installed on the forming protruding block in a sliding mode, a core pulling rod is installed on the tunnel sliding block in an inclined mode, the top end of the core pulling rod is connected with an upper die plate, and a self-lubricating component is arranged on the tunnel sliding block. The self-lubricating component comprises a pressing plate installed on the core-pulling rod. According to the tunnel type sliding block core-pulling mold provided by the utility model, the self-lubricating component comprising the pressing plate, the air bag, the cavity, the piston plate, the first lubricating channel and the second lubricating channel is arranged, so that lubricating oil can be automatically supplemented to gaps between the core-pulling rod and the tunnel sliding block and gaps between the forming convex block and the tunnel sliding block, and friction can be reduced; and the sliding of the core-pulling rod and the tunnel sliding block is smoother.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a tunnel-type slider core-pulling mold. Background Art

[0002] Injection molds are commonly used equipment for producing plastic parts. Currently, core-pulling molds generally use core-pulling components with external drive mechanisms.

[0003] The existing document, with the announcement number CN219686430U, discloses a multi-slider core-pulling mechanism for an injection mold for a lower guide plate of an automobile bumper. The mechanism comprises an upper mold plate and a lower mold plate, a molding cavity being defined between the upper and lower mold plates, and an outwardly protruding molding protrusion being provided on the lower mold plate. Furthermore, a first slider core-pulling assembly, a second slider core-pulling assembly, and a tunnel-type slider core-pulling assembly connected to the molding cavity are provided between the upper and lower mold plates. The molding cavity between the upper and lower mold plates can be used for injection molding automobile bumper lower guide plate products. The built-in first slider core-pulling assembly, second slider core-pulling assembly, and tunnel-type slider core-pulling assembly do not affect the mold volume. Furthermore, when the mold is opened, the separation of the upper and lower mold plates enables the automatic core-pulling of the first slider core-pulling assembly, the second slider core-pulling assembly, and the tunnel-type slider core-pulling assembly.

[0004] However, the tunnel-type slider core-pulling assembly lacks necessary lubrication measures. As the number of times the mold is used increases, wear gradually increases, and the tunnel-type slider core-pulling assembly, especially the tunnel slider, becomes more difficult to slide.

[0005] Therefore, it is necessary to provide a tunnel-type slider core-pulling mold to solve the above technical problems. Utility Model Content

[0006] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a tunnel-type slider core-pulling mold that can make the tunnel slider smoother.

[0007] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0008] A tunnel-type slider core-pulling mold comprises: an upper template and a lower template, a molding protrusion is installed on the lower template, a tunnel-type slider core-pulling assembly is installed on the molding protrusion, the tunnel-type slider core-pulling assembly comprises a tunnel slider slidably installed on the molding protrusion, a core-pulling rod is obliquely installed on the tunnel slider, the top of the core-pulling rod is connected to the upper template, a self-lubricating component is provided on the tunnel slider, the self-lubricating component comprises a pressure plate installed on the core-pulling rod, an air bag is provided below the pressure plate, a cavity is provided in the tunnel slider, the cavity is connected to the air bag, a piston is installed in the cavity, the cavity is located below the piston plate, and an appropriate amount of lubricating oil is injected into the space, the tunnel slider is provided with a first lubrication channel and a second lubrication channel connected to the cavity, the outlet of the first lubrication channel is located on one side of the core-pulling rod, and is used for lubrication between the core-pulling rod and the tunnel slider, and the outlet of the second lubrication channel is located on one side of the molding protrusion, and is used for lubrication between the molding protrusion and the tunnel slider.

[0009] Preferably, a first lubrication groove is provided at one end of the first lubrication channel, and the first lubrication groove is arranged around the core-pulling rod.

[0010] Preferably, a second lubrication groove is provided at one end of the second lubrication channel, and the second lubrication groove is arranged around the tunnel slider.

[0011] Preferably, a connecting tube is installed at the bottom of the airbag, and one end of the connecting tube passes into the cavity.

[0012] Preferably, a limit spring is installed between the piston and the bottom of the cavity.

[0013] Preferably, an oil filling pipe is installed on one side of the cavity, and a valve is installed at the end of the oil filling pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The present invention is capable of automatically replenishing lubricating oil to the gaps between the core pulling rod and the tunnel slider and between the forming protrusion and the tunnel slider by providing a self-lubricating component including a pressure plate, an air bag, a cavity, a piston plate, a first lubrication channel, and a second lubrication channel, thereby reducing friction and making the core pulling rod and the tunnel slider slide more smoothly;

[0016] (2) The utility model is provided with a first lubrication groove at one end of the first lubrication channel, which can store sufficient lubricating oil to facilitate lubrication of the core pulling rod;

[0017] (3) The utility model is provided with a second lubrication groove at one end of the second lubrication channel, which can store sufficient lubricating oil to facilitate lubrication of the tunnel slider;

[0018] (4) The utility model can facilitate the gas flow between the airbag and the cavity by installing a connecting pipe at the bottom of the airbag;

[0019] (5) The utility model can limit the piston and reduce the oil injection pressure by installing a limit spring between the piston and the cavity, making it easier to add lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic cross-sectional view of the lower template of the tunnel-type slider core-pulling mold provided by the utility model;

[0021] Figure 2 for Figure 1 Enlarged schematic diagram of part A.

[0022] Among them, the names corresponding to the figure marks are: 1-lower template, 2-forming protrusion, 3-tunnel slider, 4-core pulling rod, 5-pressure plate, 6-airbag, 7-cavity, 8-piston, 9-first lubrication channel, 10-second lubrication channel, 11-first lubrication groove, 12-second lubrication groove, 13-connecting pipe, 14-limiting spring, 15-oil filling pipe. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. The present invention includes but is not limited to the following embodiments.

[0024] Example 1:

[0025] like Figure 1-2As shown, the tunnel type slider core pulling mold provided by the utility model includes: an upper template and a lower template 1, a molding protrusion 2 is installed on the lower template 1, a tunnel type slider core pulling assembly is installed on the molding protrusion 2, the tunnel type slider core pulling assembly includes a tunnel slider 3 slidably installed on the molding protrusion 2, a core pulling rod 4 is obliquely installed on the tunnel slider 3, and the top of the core pulling rod 4 is connected to the upper template. It is worth noting that other structures provided on the upper template and the lower template 1 can refer to the contents disclosed in CN219686430U, which will not be repeated here. A self-lubricating component is provided on the upper part, which includes a pressure plate 5 installed on the core pulling rod 4, an air bag 6 is provided under the pressure plate 4, a cavity 7 is provided in the tunnel slider 3, the cavity 7 is connected to the air bag 6, a piston 8 is installed in the cavity 7, the cavity 7 is located below the piston plate 8, and an appropriate amount of lubricating oil is injected into the space below the piston plate 8. A first lubrication channel 9 and a second lubrication channel 10 connected to the cavity 7 are provided in the tunnel slider 3. The outlet of the first lubrication channel 9 is located on one side of the core pulling rod 4 and is used for lubrication between the core pulling rod 4 and the tunnel slider 3. The outlet of the second lubrication channel 10 is located at the molding convex block 2 side, used for lubricating between the forming protrusion 2 and the tunnel slider 3. When in use, when the mold is closed, the upper mold plate drives the core pulling rod 4 to descend, and the core pulling rod 4 descends so that the pressure plate 5 presses the air bag 6. The gas in the air bag 6 enters the upper space of the cavity 7, causing the piston 8 to descend and compress the spring 14, and the lubricating oil is discharged through the first lubrication channel 9 and the second lubrication channel 10 to the gap between the core pulling rod 4 and the tunnel slider 3, and the gap between the forming protrusion 2 and the tunnel slider 3, respectively, so that the gap between the core pulling rod 4 and the tunnel slider 3, and the gap between the forming protrusion 2 and the tunnel slider 3 Lubrication is achieved to prevent accelerated wear and uneven sliding. During demoulding, the upper template rises and the pressure plate 5 is pulled by the core-pulling rod 4 to separate the pressure plate 5 from the airbag 6. It is worth noting that since the gas has strong compressibility and the gap between the core-pulling rod 4 and the tunnel slider 3, as well as the gap between the forming protrusion 2 and the tunnel slider 3 are small (clearance fit), the height of the piston 8 dropped each time will not be too large, so that all the lubricating oil will not be injected into the gap at one time. Therefore, the lubricating oil can be used for a period of time before being replenished.

[0026] By providing a self-lubricating component including a pressure plate 5, an airbag 6, a cavity 7, a piston plate 8, a first lubrication channel 9 and a second lubrication channel 10, lubricating oil can be automatically added to the gap between the core pulling rod 4 and the tunnel slider 3 and between the forming protrusion 2 and the tunnel slider 3, thereby reducing friction and making the sliding of the core pulling rod 4 and the tunnel slider 3 smoother.

[0027] Example 2:

[0028] like Figure 2As shown, a first lubrication groove 11 is provided at one end of the first lubrication channel 9. The first lubrication groove 11 is arranged around the core-pulling rod 4. The lubricating oil in the first lubrication groove 11 is squeezed into the first lubrication groove 11 for temporary storage, so that when the core-pulling rod 4 slides, part of the lubricating oil is taken away for lubrication, thereby preventing the lubricating oil from being too little and affecting the lubrication effect.

[0029] By providing the first lubrication groove 11 at one end of the first lubrication channel 9 , sufficient lubricating oil can be stored to facilitate lubrication of the core-pulling rod 4 .

[0030] Example 3:

[0031] like Figure 1-2 As shown, a second lubrication groove 12 is provided at one end of the second lubrication channel 10. The second lubrication groove 12 is arranged around the tunnel slider 3. Similar to the function of Example 2, a portion of lubricating oil is temporarily stored in the second lubrication groove 12 for lubricating the tunnel slider 3 to prevent too little lubricating oil from affecting the lubrication effect.

[0032] By providing the second lubrication groove 12 at one end of the second lubrication channel 10 , sufficient lubrication oil can be stored to facilitate lubrication of the tunnel slider 3 .

[0033] Example 4:

[0034] like Figure 2 As shown, a connecting tube 13 is installed at the bottom of the airbag 6 , and one end of the connecting tube 13 is passed into the cavity 7 . When in use, the gas in the airbag 6 and the gas in the cavity 7 can flow freely through the connecting tube 13 .

[0035] By installing the connecting pipe 13 at the bottom of the airbag 6 , the gas flow between the airbag 6 and the cavity 7 can be facilitated.

[0036] Example 5:

[0037] like Figure 2 As shown, a limit spring 14 is installed between the piston 8 and the bottom inner wall of the cavity 7, and an oil filling pipe 15 is installed on one side of the cavity 7, and a valve is installed at the end of the oil filling pipe 15. When the piston 8 is subjected to the gas pressure from above and drops to above the connection between the oil filling pipe 15 and the cavity 7, the spring 14 is compressed to the limit and cannot be compressed further, thereby limiting the height of the piston plate 8. In addition, when it is necessary to replenish lubricating oil in the cavity 7, oil is injected into the cavity 7 through the oil filling pipe 15. The compressed spring 14 pushes the piston 8 upward under the action of its own stress, thereby reducing the oil filling pressure and facilitating the replenishment of lubricating oil into the cavity 7.

[0038] By installing a limit spring 14 between the piston 8 and the cavity 7, the piston 8 can be limited and the oil injection pressure can be reduced, making it convenient to replenish the lubricating oil.

[0039] Working principle: when using, when the mold is closed, the upper die plate drives the core pulling rod 4 to descend, the core pulling rod 4 descends and makes the pressing plate 5 press the air bag 6, the gas in the air bag 6 enters the upper space of the cavity 7, so that the piston 8 descends and compresses the spring 14, the lubricating oil is discharged to the gap between the core pulling rod 4 and the tunnel slider 3 and the gap between the forming convex block 2 and the tunnel slider 3 through the first lubricating channel 9 and the second lubricating channel 10 respectively, so that the lubrication between the core pulling rod 4 and the tunnel slider 3 and the forming convex block 2 and the tunnel slider 3 is realized, thereby preventing the appearance of accelerated wear, sliding not smooth and other conditions, when demolding, the upper die plate rises, the pressing plate 5 is pulled by the core pulling rod 4, so that the pressing plate 5 is separated from the air bag 6, it is worth mentioning that because the gas has strong compressibility, and the gap between the core pulling rod 4 and the tunnel slider 3 and the gap between the forming convex block 2 and the tunnel slider 3 is small, the height of the piston 8 descending each time will not be too large, so as not to inject all the lubricating oil into the gap at one time, therefore, the lubricating oil can be used for a period of time and then supplemented.

Claims

1. A tunnel-type slider core-pulling mold, characterized in that: include: Upper template and lower template (1); A forming convex block (2) is installed on the lower template (1), and a tunnel-type slider core-pulling assembly is installed on the forming convex block (2); The tunnel-type slider core-pulling assembly comprises a tunnel slider (3) slidably mounted on the forming protrusion (2), a core-pulling rod (4) being obliquely mounted on the tunnel slider (3), the top end of the core-pulling rod (4) being connected to the upper template, and a self-lubricating component being provided on the tunnel slider (3); The self-lubricating component comprises a pressure plate (5) mounted on a core pulling rod (4), an air bag (6) is provided below the pressure plate (5), a cavity (7) is provided in the tunnel slider (3), the cavity (7) is communicated with the air bag (6), a piston (8) is installed in the cavity (7), and a first lubrication channel (9) and a second lubrication channel (10) are provided in the tunnel slider (3) and are communicated with the cavity (7).

2. The tunnel-type slider core-pulling mold according to claim 1, characterized in that: A first lubrication groove (11) is provided at one end of the first lubrication channel (9), and the first lubrication groove (11) is arranged around the core pulling rod (4).

3. The tunnel-type slider core-pulling mold according to claim 1, characterized in that: A second lubrication groove (12) is provided at one end of the second lubrication channel (10), and the second lubrication groove (12) is arranged around the tunnel slider (3).

4. The tunnel-type slider core-pulling mold according to claim 1, characterized in that: A connecting tube (13) is installed at the bottom of the airbag (6), and one end of the connecting tube (13) is passed into the cavity (7).

5. The tunnel-type slider core-pulling mold according to claim 1, characterized in that: A limit spring (14) is installed between the piston (8) and the bottom of the cavity (7).

6. The tunnel-type slider core-pulling mold according to claim 1, characterized in that: An oil filling pipe (15) is installed on one side of the cavity (7).

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