Continuous secondary ejection mold frame

Abstract

The utility model provides a continuous secondary ejection mold frame, and relates to the technical field of mold frames, a bottom plate is mounted at the bottom of an upper mold, and an ejection assembly comprises an upper needle plate group and a lower needle plate group which are vertically mounted above the bottom plate; the linkage mechanism is arranged at the outer end of the upper needle plate set and the outer end of the lower needle plate set, the linkage mechanism comprises a transmission piece fixedly installed outside the upper needle plate set and a longitudinal block fixedly installed outside the lower needle plate set, a notch is formed in the longitudinal block, the tail end of the transmission piece penetrates into the longitudinal block, and the positioning part can guarantee that connection between the transmission piece and the notch does not shake; the stability of the upper needle plate group and the lower needle plate group during movement is improved, and when the positioning parts are in butt joint, a buffering effect can be achieved through the springs, so that abrasion generated when the transmission blocks are in contact with the notches is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mold frames, and more specifically, to a continuous secondary ejection mold frame. Background Art

[0002] Generally speaking, when taking out the finished product from the mold, whether a single or multi-component ejection mechanism is used, the ejection action is completed in one go.

[0003] During the mold opening process, for some products with simpler shapes, the molded product can be removed from the mold by only one ejection by the mold's ejector mechanism. However, due to the special shape of the finished product, after one ejection, the finished product is still in the mold cavity and cannot fall off automatically. In this case, another ejection action is required. This ejection action design is called secondary ejection.

[0004] The secondary ejection process in the traditional mold frame is completed by the ejection mechanism performing a second ejection action. The ejection mechanism needs to be reset before ejection can be performed again, which will extend the production time. Therefore, some mold frames are gradually eliminating this process and equipping the ejection mechanism with a secondary ejection device. However, the secondary ejection device is often complex in structure and cannot ensure that the path during the secondary ejection is completely perpendicular to the ejection mechanism. This will cause the ejector pin to deviate, causing greater wear on the mold frame, mold, and even the mold cavity, and affecting the yield rate. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a continuous secondary ejection mold frame with precise structure and stable operation.

[0006] The purpose and effect of the utility model are achieved by the following specific technical means:

[0007] A continuous secondary ejection die frame comprises an upper die, a lower die arranged on the top of the upper die, and an ejection assembly movably arranged between the upper die and the lower die;

[0008] A bottom plate is installed at the bottom of the upper mold, and the ejection assembly includes an upper needle plate group and a lower needle plate group vertically installed above the bottom plate;

[0009] A linkage mechanism is arranged at the outer ends of the upper needle plate group and the lower needle plate group, the linkage mechanism comprises a transmission member fixedly installed outside the upper needle plate group, and a longitudinal block fixedly installed outside the lower needle plate group, a notch is provided inside the longitudinal block, and the end of the transmission member penetrates into the longitudinal block, a transmission block movably connected to the notch is provided at the end of the transmission member, and the width of the transmission block is greater than the width of the position where the transmission member penetrates into the longitudinal block;

[0010] A limiting mechanism for limiting the longitudinal block is fixedly installed outside the bottom plate;

[0011] In this design, the transmission member is moved upward by the upper needle plate group, and the longitudinal block is pulled upward by the transmission block, so that the lower needle plate group is also moved upward, which plays a role of secondary ejection, and the upward position of the longitudinal block can be limited by the limit mechanism.

[0012] A further preferred solution is that ejectors are fixed to the tops of the upper needle plate group and the lower needle plate group, and the tops of the ejectors are connected to the upper mold, and the ejectors on the top surface of the lower needle plate group pass through the upper needle plate group.

[0013] A further preferred solution: the upper needle plate group and the lower needle plate group are both composed of two needle plates.

[0014] A further preferred solution: linkage mechanisms and limit mechanisms are provided on both sides of the upper needle plate group and the lower needle plate group;

[0015] This design can maintain the stable movement of the needle plate on both sides through the linkage mechanism and the limit mechanism on both sides.

[0016] A further preferred solution is that the transmission member and the longitudinal block are arranged in an inverted T shape, and when the upper needle plate group is close to the lower needle plate group, the top of the transmission block is separated from the notch by a distance of 0.5 cm to 6 cm.

[0017] A further preferred solution is that a positioning portion is provided at the top of the transmission block and the notch.

[0018] A further preferred solution: the positioning portion is chamfered, or concave-convex;

[0019] When the positioning portion is concave-convex, the top wall of the notch and the top of the transmission block are concave and convex respectively, and the corresponding positions of the concave and convex are matched when the transmission block is connected to the notch;

[0020] This design can improve the positioning effect.

[0021] A further preferred solution is that an elastic member is provided on one side of the positioning portion, and the elastic member is arranged in the transmission block or the notch.

[0022] A further preferred solution: the two sides of the limit mechanism extend to the two ends of the linkage mechanism respectively, and a reserved groove is provided at the top of the limit mechanism, and the width of the reserved groove is greater than the width of the transmission member and less than the width of the longitudinal block;

[0023] The transmission member extends from the reserved groove.

[0024] A further preferred solution is that a hook is provided on the top of the limiting mechanism for blocking the longitudinal block, and the positions where the limiting mechanism contacts the longitudinal block are rounded and provided with a protective pad.

[0025] Beneficial effects of the utility model:

[0026] 1. The molded product is ejected from the mold once by the ejector pin of the upper needle plate group. After the upper needle plate group moves up, the lower needle plate group moves up again to achieve the effect of secondary ejection. The lower needle plate group is driven by the linkage mechanism. The linkage mechanism has a simple structure and avoids adding cumbersome demolding procedures. As the transmission block moves up, the concave shape on the transmission block gradually approaches the convex shape in the notch, and the two are slowly docked. The connection between the transmission block and the notch can be accurately located by two sets of positioning parts to prevent the connection between the transmission part and the longitudinal block from shifting and causing the lower needle plate group to shift when ejecting. The positioning part can ensure that the connection between the transmission block and the notch does not shake, thereby improving the stability of the upper and lower needle plate groups when moving. When the positioning parts are docked, the spring can play a buffering role to reduce the wear caused by the contact between the transmission block and the notch;

[0027] 2. When the transmission block moves upward, the top of the longitudinal block will be held back by the limiting mechanism. The rounded corners can be set to achieve precise positioning, further positioning the longitudinal block to prevent the lower needle plate assembly from shifting. The protective pad can prevent collision or sliding wear when the limiting mechanism contacts the longitudinal block. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The utility model will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0030] Figure 2 For this utility model Figure 1 A local enlarged structural diagram of the part;

[0031] Figure 3 This is a schematic diagram of the disassembly of the linkage mechanism and the limit mechanism of the utility model;

[0032] Figure 4 It is a partial cross-sectional view of the upper needle plate assembly and the lower needle plate assembly of the utility model;

[0033] Figure 5 It is a partial cross-sectional view of the upper needle plate assembly and the lower needle plate assembly of the utility model;

[0034] Figure 6 For this utility model Figure 5 A schematic diagram of the local enlarged structure at B in FIG.

[0035] Figure 7 It is a structural schematic diagram of the linkage mechanism of the utility model;

[0036] Figure 8 It is a structural schematic diagram of the linkage mechanism of the utility model;

[0037] Fig. 9 It is a structural schematic diagram of the linkage mechanism of the utility model.

[0038] Figure 1-Figure 9 Middle: upper die 1, lower die 2, bottom plate 201, upper needle plate group 3, lower needle plate group 4, linkage mechanism 5, transmission member 501, transmission block 502, longitudinal block 503, notch 504, positioning part 6, elastic member 601, limiting mechanism 7, protection pad 701. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. The following embodiments are only examples for implementing the utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the utility model. On the contrary, changes and modifications made without departing from the scope of the utility model are all within the scope of patent protection of the utility model.

[0040] See also Figure 1-Figure 2 A continuous secondary ejection mold frame comprises an upper mold 1, a lower mold 2 arranged on the top of the upper mold 1, and an ejection assembly movably arranged between the upper mold 1 and the lower mold 2, wherein a bottom plate 201 is installed at the bottom of the upper mold 1, and the ejection assembly comprises an upper needle plate group 3 and a lower needle plate group 4 vertically installed above the bottom plate 201, the upper needle plate group 3 and the lower needle plate group 4 are both composed of two needle plates, and ejector pins (not shown in the figure) are fixed on the top of the upper needle plate group 3 and the lower needle plate group 4, and the top of the ejector pins are connected to the upper mold 1, and the ejector pins on the top surface of the lower needle plate group 4 pass through the upper needle plate group 3, and the driving end of the external driving mechanism is connected to the upper needle plate group 3, and the ejector pins of the upper needle plate group 3 can eject the formed product from the mold by moving the upper needle plate group 3 upward.

[0041] See also Figure 1-Figure 5 , Secondary ejection steps:

[0042] The linkage mechanism 5 is arranged at the outer ends of the upper needle plate group 3 and the lower needle plate group 4. The linkage mechanism 5 includes a transmission member 501 fixedly installed on the outside of the upper needle plate group 3, and a longitudinal block 503 fixedly installed on the outside of the lower needle plate group 4. When the upper needle plate group 3 is driven to move upward, the transmission member 501 will move upward synchronously. A notch 504 is provided inside the longitudinal block 503. The end of the transmission member 501 penetrates into the interior of the longitudinal block 503. A transmission block 502 movably connected to the notch 504 is provided at the end of the transmission member 501. The transmission member 501 and the longitudinal block 503 are arranged in an inverted T shape (such as Figure 4 As shown in the figure, the transmission member 501 moves up and the transmission block 502 slowly enters the notch 504. In the initial state, when the upper needle plate group 3 is close to the lower needle plate group 4, the top of the transmission block 502 is 0.5cm-6cm away from the notch 504. In this scheme, a 2cm distance is preferably designed. After the transmission block 502 moves up by 2cm, the top will abut against the top of the notch 504, thereby driving the longitudinal block 503 to move up together (as shown in the figure). Figure 5As shown), the upper needle plate group 3 moves upward together with the upper needle plate group 3, and the molded product is ejected out of the mold once by the ejector pins of the upper needle plate group 3. After the upper needle plate group 3 moves upward by a distance of 2 cm, the lower needle plate group 4 moves upward again to achieve a secondary ejection effect. The lower needle plate group 4 is driven by the linkage mechanism 5. The linkage mechanism 5 has a simple structure and avoids adding a cumbersome demoulding process.

[0043] Further, such as Figure 7-9 As shown, the top of the transmission block 502 and the notch 504 is provided with a positioning portion 6, and the positioning portion 6 can be chamfered or concave-convex (such as Figure 7 When the positioning portion 6 is chamfered, when the transmission block 502 moves up to the docking state of the positioning portion 6, the chamfer can guide the transmission block 502 to move up and position, making it move up more smoothly;

[0044] When the positioning portion 6 is concave-convex, the top wall of the notch 504 and the top of the transmission block 502 are concave and convex respectively (such as Figure 8 As shown in the figure, when the transmission block 502 is connected to the notch 504, the corresponding positions of the concave and convex are matched. As the transmission block 502 moves up, the concave shape on the transmission block 502 gradually approaches the convex shape in the notch 504, and the two slowly dock. The connection between the transmission block 502 and the notch 504 can be accurately positioned through the two sets of positioning parts 6 to prevent the connection between the transmission member 501 and the longitudinal block 503 from being offset and causing the lower needle plate group 4 to be offset when it is ejected. The positioning part 6 can ensure that the connection between the transmission block 502 and the notch 504 does not shake, thereby improving the stability of the upper needle plate group 3 and the lower needle plate group 4 when they move;

[0045] Furthermore, an elastic member 601 is provided on one side of the positioning portion 6, and the elastic member 601 is disposed in the transmission block 502 or the notch 504 (such as Fig. 9 As shown), the elastic member 601 may be a spring. When the positioning portion 6 is docked, the spring may play a buffering role to reduce the wear caused when the transmission block 502 contacts the notch 504;

[0046] See also Figure 1-Figure 6A limiting mechanism 7 for limiting the longitudinal block 503 is fixedly installed outside the bottom plate 201. Both sides of the limiting mechanism 7 extend to both ends of the linkage mechanism 5, and a reserved groove is provided at the top of the limiting mechanism 7. The width of the reserved groove is greater than the width of the transmission member 501 and smaller than the width of the longitudinal block 503. When the transmission member 501 moves up, it extends from the reserved groove. A hook portion for blocking the longitudinal block 503 is provided at the top of the limiting mechanism 7. When the transmission block 502 moves up to a height of 5cm-9cm, the top of the longitudinal block 503 will be resisted by the limiting mechanism 7. The hook portion can limit the longitudinal block 503 to prevent the lower needle plate group 4 from moving up too high, and at the same time can limit the upward movement of the transmission member 501 to prevent the upper needle plate group 3 from moving up too high. The positions where the limiting mechanism 7 contacts the longitudinal block 503 are all rounded, and a protective pad 701 is provided. The rounded corner setting can also play a role in precise positioning, further positioning the longitudinal block 503, and preventing the lower needle plate group 4 from shifting. The protective pad 701 is made of rubber material, which can prevent the limiting mechanism 7 from hitting or sliding and wearing when contacting the longitudinal block 503.

[0047] Furthermore, if necessary, a person skilled in the art may choose to install a contact sensor at the top of the longitudinal block 503 and the inner side of the hook of the longitudinal block 503. When the two are close to each other, the contact sensor transmits a contact signal to the central controller of the driving mechanism, thereby controlling the driving mechanism to stop the driving action, so that the limiting mechanism 7 limits the longitudinal block 503 while the driving mechanism stops, thereby playing a dual braking role, controlling the moving position of the upper needle plate group 3 and the lower needle plate group 4, and accurately positioning the moving height.

[0048] There are two groups of linkage mechanisms 5 and limit mechanisms 7, which are respectively located on both sides of the upper needle plate group 3 and the lower needle plate group 4. They can play a linkage and positioning role on both sides of the upper needle plate group 3 and the lower needle plate group 4 to ensure the smooth operation of the upper needle plate group 3 and the lower needle plate group 4.

[0049] like Figure 2 As shown, the transmission member 501, the longitudinal block 503 and the limiting mechanism 7 are all installed by bolts on the mold frame, and the transmission member 501, the longitudinal block 503 and the limiting mechanism 7 are all arranged on the outer surface of the mold frame, which is convenient for disassembly and assembly, and more convenient for subsequent maintenance work.

Claims

1. A continuous secondary ejection mold frame, comprising an upper mold, a lower mold arranged on the top of the upper mold, and an ejection assembly movably arranged between the upper mold and the lower mold, characterized in that: A bottom plate is installed at the bottom of the upper mold, and the ejection assembly includes an upper needle plate group and a lower needle plate group vertically installed above the bottom plate; A linkage mechanism is arranged at the outer ends of the upper needle plate group and the lower needle plate group, the linkage mechanism comprises a transmission member fixedly installed outside the upper needle plate group, and a longitudinal block fixedly installed outside the lower needle plate group, a notch is provided inside the longitudinal block, and the end of the transmission member penetrates into the longitudinal block, a transmission block movably connected to the notch is provided at the end of the transmission member, and the width of the transmission block is greater than the width of the position where the transmission member penetrates into the longitudinal block; A limiting mechanism for limiting the longitudinal block is fixedly installed outside the bottom plate.

2. A continuous secondary ejection mold frame according to claim 1, characterized in that: The top ends of the upper needle plate group and the lower needle plate group are both fixed with ejector pins, and the top ends of the ejector pins are both connected to the upper mold. The ejector pins on the top surface of the lower needle plate group penetrate through the upper needle plate group.

3. A continuous secondary ejection mold frame according to claim 1, characterized in that: The upper needle plate group and the lower needle plate group are both composed of two needle plates.

4. A continuous secondary ejection mold frame according to claim 1, characterized in that: Both sides of the upper needle plate group and the lower needle plate group are provided with a linkage mechanism and a limiting mechanism.

5. The continuous secondary ejection mold frame according to claim 1, characterized in that: The transmission member and the longitudinal block are arranged in an inverted T shape, and when the upper needle plate group is close to the lower needle plate group, the top of the transmission block is spaced 0.5 cm to 6 cm from the notch.

6. A continuous secondary ejection mold frame according to claim 1, characterized in that: The transmission block and the top of the notch are provided with positioning parts.

7. A continuous secondary ejection mold frame according to claim 6, characterized in that: The positioning portion is chamfered, or concave-convex; When the positioning portion is concave-convex, the top wall of the notch and the top of the transmission block are concave and convex respectively, and the corresponding positions of the concave and convex are matched when the transmission block is connected to the notch.

8. A continuous secondary ejection mold frame according to claim 7, characterized in that: An elastic member is provided on one side of the positioning portion, and the elastic member is arranged in the transmission block or the notch.

9. A continuous secondary ejection mold frame according to claim 1, characterized in that: The two sides of the limiting mechanism extend to the two ends of the linkage mechanism respectively, and a reserved groove is provided at the top of the limiting mechanism, and the width of the reserved groove is greater than the width of the transmission member and less than the width of the longitudinal block; The transmission member extends from the reserved groove.

10. A continuous secondary ejection mold frame according to claim 9, characterized in that: A hook portion for blocking the longitudinal block is provided on the top of the limiting mechanism, and the positions where the limiting mechanism contacts the longitudinal block are all rounded and provided with a protective pad.

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