Display narrow frame die-cutting mold

Abstract

This utility model discloses a punching die for a narrow bezel of a display screen, comprising an upper die assembly and a lower die assembly. The upper die assembly includes an upper die base plate, an upper die pad plate, an upper die clamping plate, and a concave die plate. An upper die stripper plate is vertically slidably installed within the concave die cavity of the concave die plate, and the upper die stripper plate is pushed downward by an upper die spring. The lower die assembly includes a lower die base plate, a lower die clamping plate, a convex die plate, and a lower die stripper plate, and the lower die stripper plate is pushed upward by a lower die spring. The concave die plate has a folding edge clearance groove corresponding to the folded edge of the narrow bezel of the display screen, and the inner side of the folding edge clearance groove is a limiting stop surface. A movable slider is slidably installed on the lower die stripper plate. The movable slider is provided with a folding edge clamping part that extends into the folding edge clearance groove of the concave die plate when the die is closed. A slider spring is installed between the movable slider and the lower die stripper plate. An upper die insert is installed on the concave die plate. This utility model has the advantages of novel structural design, stable and reliable punching, and can effectively ensure the punching quality of the product.

Description

Technical Field

[0001] This utility model relates to the field of punching die technology, and in particular to a punching die for a narrow bezel display. Background Technology

[0002] In-vehicle central control display devices are gradually developing towards larger sizes and narrower bezels, which is constantly increasing the demand for narrow-bezel display products. For narrow-bezel display products, due to the large overall size of the product and the narrow bezel, when the product is punched through the window to obtain the narrow-bezel display product, the size and flatness of the narrow bezel are more affected by the internal stress of the material, which can easily cause problems such as difficulty in quality control and instability.

[0003] Among them, the Chinese utility model patent with patent number ZL202020554454.4 and patent name: A one-time punching forming mold for an instrument panel, specifically discloses the following technical solution: A one-time punching forming mold for an instrument panel, including a lower template and an upper template. The lower template includes a lower mold base, and a punch fixing plate is fixedly provided on the upper surface of the lower mold base. A punch stripper plate is provided above the punch fixing plate. The punch stripper plate and the punch fixing plate are elastically connected by a lower mold spring, and the punch stripper... The middle area of ​​the plate is provided with a stamping punch. The lower surface of the stamping punch is fixedly connected to the upper surface of the punch fixing plate. The stamping punch and the punch stripper plate are in sliding contact. The upper plate includes an upper die base. A die fixing plate is fixedly provided on the lower surface of the upper die base. A die stripper plate is fixedly provided on the lower surface of the die fixing plate. A stamping die matching the stamping punch is provided in the middle area of ​​the die stripper plate. The stamping die and the die fixing plate are elastically connected by an upper die spring. The stamping die and the die stripper plate are in sliding contact.

[0004] It should be noted that the aforementioned instrument panel die for one-time punching still has the following defects: For products with folded edges, such as narrow bezel monitors, during the punching process, the folded edge cannot be pressed tightly, which easily leads to deviations in the folded edge dimensions due to the internal stress of punching. Therefore, the aforementioned instrument panel die for one-time punching is not effectively applicable to the punching of narrow bezel monitors. Utility Model Content

[0005] The purpose of this utility model is to provide a narrow bezel punching die for displays to address the shortcomings of existing technologies. This narrow bezel punching die has a novel structural design, good punching stability and reliability, and can effectively guarantee the punching quality of products. It is especially suitable for punching narrow bezels of displays.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0007] A narrow bezel punching die for a display includes an upper die assembly and a lower die assembly located below the upper die assembly;

[0008] The upper mold assembly includes an upper mold base plate, an upper mold pad plate, an upper mold clamping plate, and a concave mold plate, which are screwed together from top to bottom. A vertically penetrating concave mold cavity is opened in the middle of the concave mold plate, and an upper mold stripper plate is vertically slidably installed in the concave mold cavity. The upper mold assembly also includes a number of upper mold springs located above the upper mold stripper plate and arranged at intervals. The lower end of each upper mold spring abuts against the upper surface of the upper mold stripper plate.

[0009] The lower mold assembly includes a lower mold base plate, a lower mold clamping plate, and a convex mold plate that are screwed together from bottom to top. The convex mold plate is vertically aligned with the cavity of the concave mold plate. The lower mold assembly also includes a lower mold stripper plate that is slidably sleeved around the convex mold plate and several lower mold springs that are located below the lower mold stripper plate and arranged at intervals. The upper end of each lower mold spring abuts against the lower surface of the lower mold stripper plate.

[0010] The concave template has a downward-facing folding edge clearance groove corresponding to the narrow bezel of the display, and the inner side of the folding edge clearance groove is a limiting stop surface; the lower mold stripper plate is slidably mounted with a movable slider, and the movable slider is provided with a folding edge clamping part that extends into the folding edge clearance groove of the concave template when the mold is closed.

[0011] A horizontally arranged slider spring is installed between the movable slider and the lower die stripper plate. The outer end of the slider spring abuts against the movable slider, and the inner end of the slider spring abuts against the lower die stripper plate.

[0012] The concave template is equipped with an upper die inserter arranged vertically and used to drive the movable slider to move inward.

[0013] Among them, each of the lower mold springs is a nitrogen spring.

[0014] The movable slider has a slider positioning hole corresponding to the slider spring, and the outer end of the slider spring extends into the slider positioning hole of the movable slider.

[0015] The lower mold stripper plate is screwed with guide blocks on both sides of the movable slider, and a slider guide groove is formed between the two guide blocks. The movable slider is slidably installed in the slider guide groove.

[0016] The lower mold assembly has a first mounting hole for the lower mold that extends vertically through the lower mold base plate and the lower mold clamping plate. A lower mold limiting rod is embedded in the first mounting hole for the lower mold, and the upper end of the lower mold limiting rod is screwed to the lower mold stripper plate.

[0017] When the lower mold stripper plate moves to the upper limit position relative to the lower mold clamping plate, the lower mold limit lever abuts against the lower mold clamping plate.

[0018] The lower mold assembly has a second mounting hole for the lower mold that runs vertically through the lower mold base plate, the mold clamping plate, and the convex mold plate. The second mounting hole for the lower mold is fitted with a stripper pin, a stripper spring, and a limiting screw arranged sequentially from top to bottom. The limiting screw is screwed into the lower end of the mounting hole for the lower mold. The upper end of the stripper spring abuts against the stripper pin, and the lower end of the stripper spring abuts against the limiting screw.

[0019] The upper mold assembly has a first upper mold mounting hole that passes through the upper mold base plate, the upper mold pad plate, and the upper mold clamping plate. An upper mold limiting tie rod is embedded in the first upper mold mounting hole, and the lower end of the upper mold limiting tie rod is screwed to the upper mold stripper plate.

[0020] When the upper mold stripper plate moves down to the lower limit position relative to the upper mold clamping plate, the upper mold limit lever abuts against the upper mold pad or the upper mold clamping plate.

[0021] The upper surface of the upper mold base plate is screwed with an upper support plate. The upper mold assembly has a second upper mold mounting hole that passes through the upper mold base plate, the upper mold pad plate, and the upper mold clamping plate for each upper mold spring. Each upper mold spring is embedded in the corresponding second upper mold mounting hole, and the upper end of each upper mold spring abuts against the lower surface of the upper support plate.

[0022] Compared with existing technologies, this utility model has the following advantages: Specifically, in the process of punching narrow bezels for displays, the clamping action of the concave die and the lower die stripper plate can press the outer periphery of the semi-finished narrow bezel product, ensuring that the outer periphery of the semi-finished narrow bezel product does not warp or deform during material punching; the folding edge clamping part of the movable slider cooperates with the limiting stop surface of the concave die to press the folding edge of the semi-finished narrow bezel product, ensuring that the folding edge of the semi-finished narrow bezel product does not deform during material punching. Therefore, this utility model has the advantages of novel structural design, stable and reliable punching, and can effectively guarantee the punching quality of the product, and is especially suitable for punching narrow bezels for displays. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a half-sectional schematic diagram of the present invention.

[0026] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0027] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0028] Figure 5 This is a schematic diagram of the lower mold assembly of this utility model.

[0029] exist Figures 1 to 5 This includes:

[0030] 1-Upper mold assembly; 11-Upper mold base plate; 12-Upper mold pad; 13-Upper mold clamping plate; 14-Diamond die plate; 14a-Diamond cavity; 14b-Folding clearance groove; 14c-Limiting stop; 15-Upper mold stripper plate; 16-Upper mold spring; 17-Upper mold insert; 18-Upper mold first mounting hole; 19-Upper mold limiting tie rod; 110-Upper support plate; 111-Upper mold second mounting hole; 2-Lower mold assembly; 21-Lower mold base plate; 22- 23-Lower mold clamping plate; 24-Lower mold stripper plate; 25-Lower mold spring; 26-Modible slider; 26a-Folding clamping part; 26b-Slider positioning hole; 27-Slider spring; 28-Guide block; 29-Lower mold first mounting hole; 210-Lower mold limit rod; 211-Lower mold second mounting hole; 212-Stripping ejector pin; 213-Ejector pin spring; 214-Limit screw; 215-Positioning pin; 216-Slider stop. Detailed Implementation

[0031] The present invention will now be described in conjunction with specific embodiments.

[0032] Example 1, as Figure 1 , Figure 2 as well as Figure 5 As shown, a narrow bezel punching die for a display includes an upper die assembly 1 and a lower die assembly 2 located below the upper die assembly 1.

[0033] Specifically, such as Figure 1 , Figure 2 As shown, the upper mold assembly 1 includes an upper mold base plate 11, an upper mold pad plate 12, an upper mold clamping plate 13, and a concave mold plate 14, which are screwed together from top to bottom. A vertically penetrating concave mold cavity 14a is provided in the middle of the concave mold plate 14, and an upper mold stripper plate 15 is vertically slidably installed in the concave mold cavity 14a. The upper mold assembly 1 also includes a number of upper mold springs 16 located above the upper mold stripper plate 15 and arranged at intervals. The lower end of each upper mold spring 16 abuts against the upper surface of the upper mold stripper plate 15.

[0034] Among them, such as Figure 1 , Figure 2 as well as Figure 5As shown, the lower mold assembly 2 includes a lower mold base plate 21, a lower mold clamping plate 22, and a convex mold plate 23 that are screwed together from bottom to top. The convex mold plate 23 is vertically aligned with the concave mold cavity 14a of the concave mold plate 14. The lower mold assembly 2 also includes a lower mold stripper plate 24 that is slidably sleeved around the convex mold plate 23, and a number of lower mold springs 25 that are located below the lower mold stripper plate 24 and arranged at intervals. The upper end of each lower mold spring 25 abuts against the lower surface of the lower mold stripper plate 24.

[0035] Furthermore, such as Figures 2 to 5 As shown, the concave template 14 has a downward-opening folding clearance groove 14b corresponding to the folded edge of the narrow bezel of the display, and the inner side of the folding clearance groove 14b is a limiting stop surface 14c; the lower mold stripper plate 24 is slidably mounted with a movable slider 26, and the movable slider 26 is provided with a folding clamping part 26a that extends into the folding clearance groove 14b of the concave template 14 when the mold is closed. It should be explained that the lower mold stripper plate 24 is equipped with a slider stop 216 on the outside of the movable slider 26, and the slider stop 216 is used to block the movable slider 26 to prevent it from slipping outward.

[0036] Furthermore, such as Figure 2 and Figure 3 As shown, a horizontally arranged slider spring 27 is installed between the movable slider 26 and the lower die stripper plate 24. The outer end of the slider spring 27 abuts against the movable slider 26, and the inner end of the slider spring 27 abuts against the lower die stripper plate 24.

[0037] In addition, such as Figure 2 , Figure 3 as well as Figure 5 As shown, the concave template 14 is equipped with an upper die insert 17 arranged vertically and used to drive the movable slider 26 to move inward.

[0038] It should be explained that the lower mold spring 25 in this embodiment is a nitrogen spring. It should be explained that, as... Figure 2 As shown, spring mounting holes are formed between the lower mold base plate 21 and the lower mold clamping plate 22 for each nitrogen spring. Each nitrogen spring is embedded in the corresponding spring mounting hole, and the upper end of each nitrogen spring abuts against the lower surface of the lower mold stripper plate 24.

[0039] The following is a detailed description of the display narrow bezel punching die in this embodiment, with specific action steps included:

[0040] 1. The upper mold assembly 1 and the lower mold assembly 2 are in the open mold state. Each nitrogen spring in the lower mold assembly 2 is in the extended state, causing the lower mold stripper plate 24 to move up to the upper limit position. The semi-finished product of the display narrow bezel with folded edge is placed above the convex template 23. The convex template 23 can position the semi-finished product of the display narrow bezel through the positioning pin 215.

[0041] 2. Under the driving action of the punch press, the upper mold assembly 1 moves down and performs the mold closing action. The concave plate 14 of the upper mold assembly 1 first contacts and presses down against the lower mold stripper plate 24. At this time, the outer periphery of the display narrow bezel semi-finished product is pressed between the concave plate 14 and the lower mold stripper plate 24. The elastic force of several nitrogen springs makes the outer periphery of the display narrow bezel semi-finished product pressed by the concave plate 14 and the lower mold stripper plate 24 to ensure that the outer periphery of the display narrow bezel semi-finished product does not warp or deform during material punching.

[0042] 3. As the upper mold assembly 1 continues to move downward, when each nitrogen spring has completed its downward stroke and the lower mold stripper plate 24 has moved to the lower limit position, the lower mold stripper plate 24 stops moving downward. During this process, the folding edge clamping part of the movable slider 26 extends into the folding edge clearance groove 14b of the concave template 14. The upper mold insert 17 of the upper mold assembly 1 pushes against the movable slider 26. The movable slider 26 slides inward under the action of the upper mold insert 17 to clamp the folding edge of the display narrow bezel semi-finished product between the folding edge clamping part of the movable slider 26 and the limiting stop surface 14c of the concave template 14, so as to ensure that the folding edge of the display narrow bezel semi-finished product will not be deformed during material punching.

[0043] 4. As the upper mold assembly 1 continues to move downward, the convex template 23 of the lower mold assembly 2 engages with the concave mold cavity 14a of the concave template 14 and punches a window in the middle area of ​​the display narrow bezel semi-finished product. At this time, the upper mold stripper plate 15 is pushed upward by the convex template 23, and each upper mold spring 16 is compressed. The display narrow bezel semi-finished product completes the window punching and obtains the display narrow bezel finished product.

[0044] 5. The upper die assembly 1 of the punch press moves upward and performs the die opening action. The upper die inserter 17 retracts from the movable slider 26. The movable slider 26 moves outward under the reset force of the slider spring 27, causing the folded edge clamping part of the movable slider 26 to retract from the folded edge of the display narrow bezel product. The lower die stripper plate 24 is reset under the force of the lower die spring 25, causing the display narrow bezel cost to move upward to retract from the punch plate 23. The upper die stripper plate 15 is reset under the force of the upper die spring 16, causing the product corresponding to the window to exit from the cavity 14a.

[0045] It should be emphasized that, in the process of punching the narrow bezel of the display using the display narrow bezel punching die of this embodiment, the pressing action of the concave template 14 and the lower die stripper plate 24 can press the outer periphery of the display narrow bezel semi-finished product to ensure that the outer periphery of the display narrow bezel semi-finished product does not warp or deform during material punching; the folding edge clamping part of the movable slider 26 cooperates with the limiting stop surface 14c of the concave template 14 to press the folding edge of the display narrow bezel semi-finished product to ensure that the folding edge of the display narrow bezel semi-finished product does not deform during material punching.

[0046] In summary, the above structural design, compared with the prior art, provides the advantages of novel structural design, stable and reliable punching, and can effectively guarantee the punching quality of the product, making it particularly suitable for punching narrow bezels of displays.

[0047] Example 2, as Figure 2 and Figure 3 As shown, the difference between this embodiment 2 and embodiment 1 is that the movable slider 26 has a slider positioning hole 26b corresponding to the slider spring 27, and the outer end of the slider spring 27 extends into the slider positioning hole 26b of the movable slider 26.

[0048] The movable slider 26 positions the slider spring 27 via the movable positioning block to ensure the stability of the slider spring 27's position.

[0049] Example 3, as Figure 5 As shown, the difference between this embodiment 3 and embodiment 1 is that: the lower mold stripper plate 24 is screwed with guide blocks 28 on both sides of the movable slider 26, and a slider guide groove is formed between the two guide blocks 28, and the movable slider 26 is slidably installed in the slider guide groove.

[0050] During the process of the upper die inserter 17 driving the movable slider 26 to move inward or the slider spring 27 pushing the movable slider 26 to move outward, this embodiment 3 uses the slider guide groove to guide the movement of the movable slider 26, so as to improve the stability and accuracy of the movement of the movable slider 26.

[0051] Example 4, as Figure 2 As shown, the difference between this embodiment four and embodiment one is that: the lower mold assembly 2 has a first mounting hole 29 for the lower mold that runs vertically through the lower mold base plate 21 and the lower mold clamping plate 22, and a lower mold limiting rod 210 is embedded in the first mounting hole 29. The upper end of the lower mold limiting rod 210 is screwed to the lower mold stripper plate 24.

[0052] It should be noted that when the lower mold stripper plate 24 moves to the upper limit position relative to the lower mold clamping plate 22, the lower mold limit rod 210 abuts against the lower mold clamping plate 22.

[0053] As for the lower mold limiting tie rod 210 in this embodiment, it can effectively prevent the lower mold stripper plate 24 from detaching.

[0054] Example 5, as Figure 2As shown, the difference between this fifth embodiment and the first embodiment is that the lower mold assembly 2 has a second mounting hole 211 for the lower mold that runs vertically through the lower mold base plate 21, the mold clamping plate, and the convex template 23. The second mounting hole 211 is fitted with a stripping ejector pin 212, an ejector spring 213, and a limiting screw 214 arranged sequentially from top to bottom. The limiting screw 214 is screwed into the lower end of the lower mold mounting hole. The upper end of the ejector spring 213 abuts against the stripping ejector pin 212, and the lower end of the ejector spring 213 abuts against the limiting screw 214.

[0055] For the display narrow bezel punching die of this embodiment 5, for the window material that remains in the punching plate 23 after punching, the ejector spring 213 drives the ejector pin 212 to move upward. The ejector pin 212 moving upward lifts the window material so that it can be taken out from the lower die assembly 2.

[0056] Example 6, as Figure 2 As shown, the difference between this embodiment six and embodiment one is that: the upper mold assembly 1 has an upper mold first mounting hole 18 that passes through the upper mold base plate 11, the upper mold pad plate 12, and the upper mold clamping plate 13. An upper mold limiting tie rod 19 is embedded in the first upper mold mounting hole, and the lower end of the upper mold limiting tie rod 19 is screwed to the upper mold stripper plate 15.

[0057] It should be noted that when the upper mold stripper plate 15 moves down to the lower limit position relative to the upper mold clamping plate 13, the upper mold limit lever 19 abuts against the upper mold pad 12 or the upper mold clamping plate 13.

[0058] For the upper mold limiting tie rod 19 in this embodiment, it can effectively prevent the upper mold stripper plate 15 from slipping out of the cavity 14a of the concave mold plate 14.

[0059] Example 7, as Figure 2 As shown, the difference between this embodiment seven and embodiment one is that: an upper support plate 110 is screwed onto the upper surface of the upper mold base plate 11, and the upper mold assembly 1 has a second upper mold mounting hole 111 that passes through the upper mold base plate 11, the upper mold pad plate 12, and the upper mold clamping plate 13 respectively for each upper mold spring 16. Each upper mold spring 16 is respectively embedded in the corresponding upper mold second mounting hole 111, and the upper end of each upper mold spring 16 abuts against the lower surface of the upper support plate 110.

[0060] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A display narrow bezel punching die, comprising an upper die assembly (1) and a lower die assembly (2) located below the upper die assembly (1); The upper mold assembly (1) includes an upper mold base plate (11), an upper mold pad plate (12), an upper mold clamping plate (13), and a concave mold plate (14) that are screwed together from top to bottom. A vertically penetrating concave mold cavity (14a) is provided in the middle of the concave mold plate (14), and an upper mold stripper plate (15) is vertically slidably installed in the concave mold cavity (14a). The upper mold assembly (1) also includes a number of upper mold springs (16) located above the upper mold stripper plate (15) and arranged at intervals. The lower end of each upper mold spring (16) abuts against the upper surface of the upper mold stripper plate (15). The lower mold assembly (2) includes a lower mold base plate (21), a lower mold clamping plate (22), and a convex mold plate (23) that are screwed together from bottom to top. The convex mold plate (23) is vertically aligned with the cavity (14a) of the concave mold plate (14). The lower mold assembly (2) also includes a lower mold stripper plate (24) that is slidably sleeved around the convex mold plate (23), and several lower mold springs (25) that are located below the lower mold stripper plate (24) and arranged at intervals. The upper end of each lower mold spring (25) abuts against the lower surface of the lower mold stripper plate (24). characterized in that The concave template (14) has a downward-facing folding clearance groove (14b) corresponding to the folding edge of the narrow bezel of the display. The inner side of the folding clearance groove (14b) is a limiting stop surface (14c). The lower mold stripper plate (24) is slidably mounted with a movable slider (26). The movable slider (26) is provided with a folding clamping part (26a) that extends into the folding clearance groove (14b) of the concave template (14) when the mold is closed. A horizontally arranged slider spring (27) is installed between the movable slider (26) and the lower die stripper plate (24). The outer end of the slider spring (27) abuts against the movable slider (26), and the inner end of the slider spring (27) abuts against the lower die stripper plate (24). The concave template (14) is equipped with an upper die insert (17) arranged vertically and used to drive the movable slider (26) to move inward.

2. The display narrow frame die according to claim 1, wherein: Each of the lower mold springs (25) is a nitrogen spring.

3. The display narrow frame die of claim 1, wherein: The movable slider (26) has a slider positioning hole (26b) corresponding to the slider spring (27), and the outer end of the slider spring (27) extends into the slider positioning hole (26b) of the movable slider (26).

4. The display narrow frame die of claim 1, wherein: The lower mold stripper plate (24) has guide blocks (28) screwed onto both sides of the movable slider (26). A slider guide groove is formed between the two guide blocks (28), and the movable slider (26) is slidably installed in the slider guide groove.

5. The display narrow frame die of claim 1, wherein: The lower mold assembly (2) has a first mounting hole (29) for the lower mold that runs vertically through the lower mold base plate (21) and the lower mold clamping plate (22). A lower mold limiting rod (210) is embedded in the first mounting hole (29). The upper end of the lower mold limiting rod (210) is screwed to the lower mold stripper plate (24). When the lower mold stripper plate (24) moves to the upper limit position relative to the lower mold clamping plate (22), the lower mold limit rod (210) abuts against the lower mold clamping plate (22).

6. The display narrow frame die of claim 1, wherein: The lower mold assembly (2) has a second lower mold mounting hole (211) that runs vertically through the lower mold base plate (21), the mold clamping plate, and the convex template (23). The second lower mold mounting hole (211) is fitted with a stripper pin (212), a pin spring (213), and a limiting screw (214) arranged sequentially from top to bottom. The limiting screw (214) is screwed into the lower end of the lower mold mounting hole. The upper end of the pin spring (213) abuts against the stripper pin (212), and the lower end of the pin spring (213) abuts against the limiting screw (214).

7. The display narrow frame die of claim 1, wherein: The upper mold assembly (1) has an upper mold first mounting hole (18) that passes through the upper mold base plate (11), the upper mold pad plate (12), and the upper mold clamping plate (13). An upper mold limiting tie rod (19) is embedded in the first upper mold mounting hole. The lower end of the upper mold limiting tie rod (19) is screwed to the upper mold stripper plate (15). When the upper mold stripper plate (15) moves down to the lower limit position relative to the upper mold clamping plate (13), the upper mold limit rod (19) abuts against the upper mold pad (12) or the upper mold clamping plate (13). 8.The narrow frame die for display cutting according to claim 1, wherein: The upper surface of the upper mold base plate (11) is screwed with an upper support plate (110). The upper mold assembly (1) is provided with upper mold second mounting holes (111) that pass through the upper mold base plate (11), the upper mold pad plate (12), and the upper mold clamping plate (13) respectively, corresponding to each of the upper mold springs (16). Each upper mold spring (16) is respectively embedded in the corresponding upper mold second mounting hole (111), and the upper end of each upper mold spring (16) abuts against the lower surface of the upper support plate (110).

Images