A mold with secondary ejection

Abstract

The present invention provides a mold capable of secondary ejection, which includes an upper mold and a lower mold. The upper mold includes an upper template and a core provided in the upper template; the lower mold includes a lower template and a cavity provided in the lower template; the mold further includes a secondary ejection mechanism provided on the two side arms of the upper mold and cooperating with each other. The upper mold further includes two backing plates provided on the upper template, an upper mold top plate provided on the two backing plates, and a face ejector plate, a first bottom ejector plate, and a second bottom ejector plate provided between the upper mold top plate and the template. The secondary ejection mechanism includes a fixed seat, a fastening block, a support block provided on the fastening block, and a first connecting rod and a second connecting rod, and the support block is provided between the first connecting rod and the second connecting rod. The structure of the present invention is simple. Through the push rod, direct ejection, and cooperation with the secondary ejection mechanism, the secondary ejection of the product can be realized, thus ensuring the smooth demolding of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and in particular to a mold capable of secondary ejection. Background Art

[0002] During the injection molding process of products, products with multiple latches and undercuts are often encountered. The common practice is to use angled lifters or swing rods, or to utilize the characteristics of the material in combination with the product structure to allow a certain elastic deformation space for forced demolding. However, for some products, these solutions are not applicable. For example, a product is not very large, but has multiple latches arranged, and there is not enough space to set angled lifters, and it is not suitable for forced demolding, that is, it is impossible to use the existing technology to achieve demolding. In addition, the existing technology for demolding also has the following disadvantages:

[0003] 1. In the existing angled lifter structure, since the sliding seat of the angled lifter is easily worn, and due to structural reasons, it cannot ensure very good vertical support during injection molding, resulting in the angled lifter being prone to being too low or too high during production. Being too low may cause excessive glue and affect product assembly, and being too high may damage the product when releasing the latch.

[0004] 2. The existing angled lifter structure cannot be made too small, otherwise it is easy to produce elastic deformation, resulting in unqualified product quality and breakage. If the angled lifter structure is designed larger, it will affect the design of the cooling water channels in the inner mold core.

[0005] 3. In the existing angled lifter structure, the product is not easy to fall off during demolding. It requires manual or robotic grasping, that is, automatic demolding cannot be achieved.

[0006] 4. The existing angled lifter structure requires machining of angled holes and irregular parts, and the processing cost is relatively high. Summary of the Invention

[0007] In view of the deficiencies of the prior art, the present invention provides a mold capable of secondary ejection, which can realize the secondary ejection of the product, thereby ensuring the smooth demolding of the product with undercuts.

[0008] The technical solution of the present invention is: a mold capable of secondary ejection, including an upper mold and a lower mold. The upper mold includes an upper template and a core set inside the upper template;

[0009] The lower mold includes a lower template and a cavity set inside the lower template;

[0010] The mold further includes a secondary ejection mechanism arranged on the two side arms of the upper mold and cooperating with each other.

[0011] Further, the upper mold further includes two backing plates arranged on the upper template, an upper mold top plate is arranged on the two backing plates, and the two backing plates are installed on the upper template through a plurality of corresponding screws.

[0012] Further, the upper mold further includes a face pin plate, a first bottom pin plate, and a second bottom pin plate disposed between the upper mold top plate and the upper template.

[0013] Further, a plurality of return pins are connected between the face pin plate and the upper template.

[0014] Further, a plurality of support columns are connected between the face pin plate, the first bottom pin plate, and the second bottom pin plate, and support column sleeves are sleeved on the support columns.

[0015] Further, a plurality of straight ejectors are provided at the lower end of the face pin plate, and the straight ejectors extend downward into the upper template and are inserted around the core.

[0016] Further, a push rod is provided at the lower end of the second bottom pin plate, and the push rod extends downward through the first bottom pin plate, the face pin plate, and the upper template in sequence and is inserted into the core.

[0017] Further, the lower mold further includes a lower mold bottom plate disposed at the lower end of the lower template.

[0018] Further, the secondary ejection mechanism includes a fixed seat, and a latch assembly disposed in the fixed seat for fixing the face pin plate of the upper mold, as well as the first bottom pin plate and the second bottom pin plate.

[0019] Further, the fixed seat is of an L-shaped structure, and a groove is provided along the length direction of the fixed seat, and the latch assembly is disposed in the groove and can move in the groove.

[0020] Further, a plurality of fixing rods for connecting with the upper template are provided at the lower end of the fixed seat.

[0021] Further, the latch assembly includes a latch block, a support block is provided on the latch block, as well as a first connecting rod and a second connecting rod, and the support block is disposed between the first connecting rod and the second connecting rod.

[0022] Further, a card slot is provided at the upper end of the latch block, and a spring block disposed in the second bottom pin plate is also connected in the card slot, and a plurality of springs are provided on the spring block.

[0023] Further, the position where the spring block is clamped with the card slot is of a wedge-shaped structure.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The structure of the present invention is simple. Through the cooperation of the push rod, the straight ejector, and the secondary ejection mechanism, the secondary ejection of the product can be realized, thereby ensuring the smooth demolding of the product. Description of the Drawings

[0026] Figure 1 Structural schematic diagram of the present invention;

[0027] Figure 2 Structural schematic diagram of the upper template of the present invention;

[0028] Figure 3 Structural schematic diagram of the lower template of the present invention;

[0029] Figure 4 Partial structural schematic diagram of the upper mold of the present invention;

[0030] Figure 5 Structural schematic diagram of the connection between the core and the straight ejector of the present invention;

[0031] Figure 6 Structural schematic diagram of the secondary ejection mechanism of the present invention;

[0032] Figure 7 Structural schematic diagram of the fastening block of the present invention;

[0033] In the figure, 1 - upper mold top plate, 2 - face ejector plate, 3 - first bottom ejector plate, 4 - second bottom ejector plate, 5 - upper template, 6 - backing plate, 7 - lower template, 8 - lower mold bottom plate, 9 - secondary ejection mechanism;

[0034] 21 - return pin, 22 - support pillar, 23 - straight ejector, 24 - push rod;

[0035] 51 - core, 52 - runner;

[0036] 71 - cavity;

[0037] 91 - fixed seat, 92 - groove, 93 - fixed rod, 94 - fastening block, 95 - support block, 96 - first connecting rod, 97 - second connecting rod; 98 - clamping groove, 99 - elastic block, 100 - spring; Specific embodiments

[0038] The following further describes the specific embodiments of the present invention in conjunction with the accompanying drawings:

[0039] As Figure 1 shown, this embodiment provides a mold capable of secondary ejection, including a mutually cooperating upper mold and lower mold, and the mold further includes a mutually cooperating secondary ejection mechanism provided on both side arms of the upper mold.

[0040] Furthermore, as Figure 2 shown, in this embodiment, the upper mold includes an upper template 5 and a core 51 disposed within the upper template 5. In this embodiment, there are two cores 51; and the two cores 51 are connected and communicated through a runner 52.

[0041] Furthermore, as Figure 3As shown, the lower mold in this embodiment includes a lower template 7 and a cavity 71 disposed within the lower template 7. Correspondingly, the number of the cavities 71 is also two, and the two cavities 71 are also connected through corresponding runners 52.

[0042] Further, as a preference of this embodiment, as Figure 1 shown, the upper mold further includes two backing plates 6 disposed on the upper template 5, an upper mold top plate 1 is disposed on the two backing plates 6, and the two backing plates 6 are mounted on the upper template 5 through a plurality of corresponding screws.

[0043] Further, as a preference of this embodiment, as Figure 1 shown, the upper mold further includes a face ejector plate 2, a first bottom ejector plate 3, and a second bottom ejector pin 4 disposed between the upper mold top plate 1 and the upper template 5. In this embodiment, the face ejector plate 2 is located above the upper template 5, and the first bottom ejector plate 3 and the second bottom ejector pin 4 are sequentially arranged on the face ejector plate 2. And in this embodiment, as Figure 4 shown, the face ejector plate 2, the first bottom ejector plate 3, and the second bottom ejector pin 4 are disposed between the mold top plate 1 and the upper template 5 through a plurality of support columns 22. In this embodiment, a corresponding support column sleeve is further sleeved on each support column 22.

[0044] Further, as a preference of this embodiment, as Figure 4 shown, a plurality of return pins 21 are connected between the face ejector plate 2 and the upper template 5.

[0045] Further, as a preference of this embodiment, as Figure 4 、 5 shown, a plurality of straight ejectors 23 are further disposed at the lower end of the face ejector plate 2, and the straight ejectors 23 extend downward into the upper template 5 and are inserted into the slot holes of the core 51.

[0046] Further, as Figure 4 、 5 shown, a push rod 24 is further disposed at the lower end of the second bottom ejector plate 4 in this embodiment, and the push rod 24 extends downward and sequentially passes through the first bottom ejector plate 3, the face ejector plate 2, and the upper template 5 and is inserted into the core 51.

[0047] Further, as Figure 1 shown, the lower mold in this embodiment further includes a lower mold bottom plate 8 disposed at the lower end of the lower template 7.

[0048] Further, as Figure 6 shown, the secondary ejection mechanism 9 includes a fixed seat 91, and a latch assembly disposed within the fixed seat 91 for fixing the face ejector plate 2 of the upper mold, as well as the first bottom ejector plate 3 and the second bottom ejector plate 4.

[0049] Further, as a preference of this embodiment, the fixing base 91 is of an L-shaped structure, and a groove 92 is provided along the length direction on the fixing base 91. The buckle assembly is arranged in the groove 92 and can move in the groove 92. In this embodiment, a plurality of fixing rods 94 for connecting with the upper template 5 are arranged at the lower end of the fixing base 91. In this embodiment, the number of the fixing rods 94 is 4.

[0050] Further, as a preference of this embodiment, the buckle assembly includes a buckling block 94, a supporting block 95 is arranged on the buckling block 94, and a first connecting rod 96 and a second connecting rod 97. The supporting block 95 is arranged between the first connecting rod 96 and the second connecting rod 97. In this embodiment, the first connecting rod 96 is connected with the face needle plate 2, the second connecting rod 97 is connected with the first bottom needle plate 3, and the supporting block 95 is clamped in the groove at the lower end of the first bottom needle plate 3.

[0051] Further, as a preference of this embodiment, as Figure 7 shown, a clamping groove 98 is further provided at the upper end of the buckling block 94 of this embodiment. The clamping groove 98 is also connected with a spring block 99 arranged in the second bottom needle plate 4. The position where the spring block 99 is connected with the clamping groove 98 is of a wedge-shaped structure, and a plurality of springs 100 are arranged on the spring block 99.

[0052] During the use process, since the face needle plate 2, the first bottom needle plate 3, and the second bottom needle plate 4 are connected by the buckle assembly, therefore, during the first demolding process, the face needle plate 3, the first bottom needle plate 3, and the second bottom needle plate 4 will move together with the buckle assembly. When the first demolding is completed, the spring block 99 of the second bottom needle plate 4 is separated from the clamping groove 98, and then the second demolding process is carried out. During the ejection process, since the face needle plate 2 and the first bottom needle plate 3 are connected with the first connecting rod 96 and the second connecting rod 97, the buckling block 94 will move a certain distance in the groove 92, and then continue to eject the face needle plate 2 and the first bottom needle plate 3. At the same time, during the movement of the first bottom needle plate 3 and the second bottom needle plate 4, the product is ejected through the direct ejector 23 and the push rod 24.

[0053] The above embodiments and descriptions in the specification only illustrate the principle and the best embodiments of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A mold with secondary ejection, comprising an upper mold and a lower mold that cooperate with each other, characterized in that, The upper die mentioned above includes an upper template and a core set inside the upper template; The lower die mentioned above includes a lower template and a cavity set inside the lower template; The die also includes a secondary ejection mechanism arranged on both side arms of the upper die and cooperating with each other; It also includes a plurality of straight ejectors and ejector rods connected to the core; The upper die also includes two backing plates arranged on the upper template, an upper die top plate is arranged on the two backing plates, and the two backing plates are installed on the upper template through a plurality of corresponding screws; The upper die also includes a face ejector plate, a first bottom ejector plate, and a second bottom ejector plate arranged between the upper die top plate and the upper template; A plurality of return pins are connected between the face ejector plate and the upper template; The face ejector plate, the first bottom ejector plate, and the second bottom ejector plate are arranged between the upper die top plate and the upper template through a plurality of corresponding support columns, and support column sleeves are also sleeved on the support columns; A plurality of straight ejectors are also arranged at the lower end of the face ejector plate, and the straight ejectors extend downward into the upper template and are inserted into the core; A push rod is also arranged at the lower end of the second bottom ejector plate, and the push rod extends downward and sequentially passes through the first bottom ejector plate, the face ejector plate, and the upper template and is inserted into the core; The lower die also includes a lower die bottom plate arranged at the lower end of the lower template; The secondary ejection mechanism includes a fixed seat, and a latch assembly arranged inside the fixed seat for fixing the face ejector plate, the first bottom ejector plate, and the second bottom ejector plate of the upper die, and a plurality of fixing rods for connecting with the upper template are arranged at the lower end of the fixed seat; The fixed seat is of an L-shaped structure, and a groove is provided along the length direction on the fixed seat, and the latch assembly is arranged in the groove and can move in the groove; The latch assembly includes a latch block, a support block is arranged on the latch block, and a first connecting rod and a second connecting rod, and the support block is arranged between the first connecting rod and the second connecting rod; A clamping groove is also provided at the upper end of the latch block, and a spring block arranged inside the second bottom ejector plate is also connected in the clamping groove. The position where the spring block is clamped with the clamping groove is of a wedge-shaped structure, and a plurality of springs are arranged on the spring block.

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