Product demolding structure of injection mold

Abstract

The utility model discloses a product demoulding structure of an injection mould, which comprises a plate B, a first ejector plate and a second ejector plate, the first ejector plate and the second ejector plate are arranged at the bottom of the plate B. The first ejector plate is provided with a first ejector which extends into the plate B and is contacted with a product cavity, and the second ejector plate is internally provided with a water gap ejection structure. And the abutting end a of the water gap ejection structure extends into the water cavity in the plate B and sequentially moves towards the plate B along with the first ejector plate and the second ejector plate, so that a product in the product cavity is separated from a glue solution in the water cavity. Through the movement of the first ejector plate and the second ejector plate towards the B plate, a first ejector on the first ejector plate can push a product in the B plate to be separated from a product cavity, and an abutting end in a water gap ejection structure on the second ejector plate can push out excess materials in the B plate to be separated from a water gap cavity, so that a water gap automatically falls off while the product is ejected out of the injection mold; manual secondary processing is avoided, the production efficiency is improved, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technology in the field of injection molds, in particular to a product demoulding structure of an injection mold. Background Art

[0002] With the progress of the design technology of molds, more and more innovative and applied molds appear in all walks of life. An injection mold is a tool for producing plastic products; the demoulding of a mold refers to taking out the product that has been condensed from the mold.

[0003] However, for the existing auxiliary demoulding structures of injection molds, during the use process, most of the auxiliary demoulding structures of plastic product injection molds cannot effectively separate the product from the mold cavity during demoulding, or the product fails to separate from the remaining material in the sprue after separation, thus affecting the processing efficiency of the product. Summary of the Utility Model

[0004] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present utility model is to provide a product demoulding structure of an injection mold, which can further...

[0005] To achieve the above purpose, the present utility model adopts the following technical solution: A product demoulding structure of an injection mold includes a B plate, a first ejector plate and a second ejector plate provided at the bottom of the B plate. A first ejector pin extending into the B plate and contacting the product cavity is provided on the first ejector plate. A sprue ejecting structure is provided in the second ejector plate, and the contact end a of the sprue ejecting structure extends into the sprue cavity in the B plate. As the first ejector plate and the second ejector plate move sequentially towards the B plate, the product in the product cavity is separated from the glue in the sprue cavity.

[0006] Further, the sprue ejecting structure includes an insertion hole opened in the first ejector plate, a second ejector pin is inserted into the insertion hole, the upper end of the second ejector pin extends into the sprue cavity, and the contact end a is located at the upper end of the second ejector pin.

[0007] Further, an inwardly concave expansion groove is provided at one end of the insertion hole opposite to the second ejector plate, and a limiting ring lapped in the expansion groove is connected to one end of the second ejector pin located in the expansion groove.

[0008] Further, the sprue ejecting structure further includes a receiving groove opened on one side of the second ejector plate opposite to the first ejector plate, a top rod is inserted into the receiving groove, and the top rod corresponds to the limiting ring.

[0009] Further, a contact rod is connected to the lower end of the top rod, the contact rod penetrates to the bottom of the second ejector plate and abuts against the base.

[0010] Further, the cross-sectional area of the contact rod is smaller than that of the top rod, and the top rod fits with the inner cavity of the receiving groove.

[0011] Further, when the top of the ejector rod is parallel to the second ejector plate, there is a margin space of 3-5 mm between the bottom of the ejector rod and the bottom wall of the receiving groove.

[0012] Further, the cross-sectional area of the expansion slot is larger than that of the insertion hole, and the cross-sectional area of the expansion slot is smaller than that of the receiving groove.

[0013] Compared with the prior art, the present utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions, by the movement of the first ejector plate and the second ejector plate towards the B plate, the first ejector pins on the first ejector plate can push the products in the B plate out of the product cavity, and the contact end in the gate ejection structure on the second ejector plate can push the remaining materials in the B plate out of the gate cavity, so that while the injection mold ejects the products, the gate automatically falls off, avoiding manual secondary processing, improving production efficiency and product quality.

[0014] To more clearly illustrate the structural features and functions of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of Embodiment 1 of the present utility model.

[0016] Figure 2 is a perspective view of Embodiment 1 of the present utility model.

[0017] Figure 3 is a perspective view of Embodiment 1 of the present utility model.

[0018] Figure 4 is of Embodiment 1 of the present utility model Figure 1 enlarged view of part A.

[0019] Figure 5 is of Embodiment 1 of the present utility model Figure 3 enlarged view of part B.

[0020] DESCRIPTION OF THE REFERENCE NUMERALS

[0021] 10 B plate, 11 product cavity, 12 gate cavity, a contact end;

[0022] 20 first ejector plate, 21 first ejector pin, 30 second ejector plate;

[0023] 40 gate ejection structure, 41 insertion hole, 42 second ejector pin, 43 expansion slot, 44 limiting ring, 45 receiving groove, 46 ejector rod, 47 contact rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Please refer to Figures 1-5As shown, it shows the specific structure of the first preferred embodiment of the present utility model, which is a product demoulding structure of an injection mould, including a B plate 10, a first ejector plate 20 provided at the bottom of the B plate 10, and a second ejector plate 30. A first ejector pin 21 extending into the B plate 10 and contacting the product cavity 11 is provided on the first ejector plate 20. A gate ejecting structure 40 is provided in the second ejector plate 30. The contact end a of the gate ejecting structure 40 extends into the gate cavity 12 in the B plate 10. As the first ejector plate 20 and the second ejector plate 30 move sequentially towards the B plate 10, the product in the product cavity 11 is separated from the glue in the gate cavity 12. When the first ejector plate 20 moves upwards, the first ejector pin 21 thereon extends into the product cavity 11, contacting the product in the product cavity 11 to separate the product from the product cavity 11. The second ejector plate 30 drives the gate ejecting structure 40 to move upwards, so that the contact end a of the gate ejecting structure 40 pushes the remaining material in the gate cavity 12 upwards to separate it from the inner wall of the gate cavity 12, thereby completing the separation of the product and the gate, and increasing the processing efficiency of the injection mould.

[0025] Specifically, the first ejector plate 20 is located above the second ejector plate 30, and the first ejector plate 20 is located below the B plate 10. The product cavity 11 and the gate cavity 12 are provided on the B plate 10, and the product cavity 11 and the gate cavity 12 are connected and communicated. After the B plate 10 is clamped with the external A plate, the glue can be injected into the product cavity 11 from the gate cavity 12.

[0026] As Figure 4 shown, exemplarily, the gate ejecting structure 40 includes an insertion hole 41 opened on the first ejector plate 20. A second ejector pin 42 is inserted into the insertion hole 41. The upper end of the second ejector pin 42 extends into the gate cavity 12, and the contact end a is located at the upper end of the second ejector pin 42. Since the insertion hole 41 penetrates the first ejector plate 20, when the first ejector plate 20 moves towards the B plate 10, the second ejector pin 42 will not move with the first ejector plate 20, but drives the first ejector pin 21 on the first ejector plate 20 to move towards the B plate 10, separating the product from the product cavity 11 and separating it from the remaining material in the gate cavity 12.

[0027] As Figure 4As shown, exemplarily, an inner concave expansion slot 43 is provided at one end of the insertion hole 41 relative to the second ejector plate 30 on the first ejector plate 20. A limiting ring 44 that overlaps in the expansion slot 43 is connected to one end of the second ejector pin 42 located in the expansion slot 43. The expansion slot 43 is opened on one side of the first ejector plate 20 relative to the second ejector pin 42, and the expansion slot 43 communicates with the insertion hole 41. The limiting ring 44 inserted in the expansion slot 43 is sleeved and fixed with the second ejector pin 42, and the second ejector pin 42 is located in the middle of the limiting ring 44. When the first ejector plate 20 moves to a predetermined position, the second ejector plate 30 moves towards the first ejector plate 20, pushing the limiting ring 44 to move into the expansion slot 43, and then the abutting end a of the second ejector pin 42 pushes the remaining material in the water cavity 12 to separate from the inner wall of the water cavity 12.

[0028] As Figure 4 shown, exemplarily, the gate ejecting structure 40 further includes a receiving groove 45 opened on one side of the second ejector plate 30 relative to the first ejector plate 20. A ejector rod 46 is inserted in the receiving groove 45, and the ejector rod 46 corresponds to the limiting ring 44. Due to the correspondence between the receiving groove 45 and the expansion slot 43, when the second ejector plate 30 moves closer to the first ejector plate 20, the bottom wall of the receiving groove 45 needs to abut against the ejector rod 46 before the second ejector pin 42 can be pushed upward to achieve the effect of delayed pushing, so as to prevent the second ejector pin 42 and the first ejector pin 21 from moving upward simultaneously, which may affect the separation of the product and the gate.

[0029] As Figure 4 shown, exemplarily, a abutting rod 47 is connected to the lower end of the ejector rod 46. The abutting rod 47 penetrates to the bottom of the second ejector plate 30 and abuts against the base. The abutting rod 47 penetrates to abut against the second ejector plate 30. When the bottom surface of the second ejector plate 30 fits the plane, the upper part of the ejector rod 46 is parallel to the upper end surface of the second ejector plate 30.

[0030] The cross-sectional area of the abutting rod 47 is smaller than that of the ejector rod 46, and the ejector rod 46 fits the inner cavity of the receiving groove 45.

[0031] As Figure 4 shown, exemplarily, when the top of the ejector rod 46 is parallel to the second ejector plate 30, there is a margin space of 3 - 5 mm between the bottom of the ejector rod 46 and the bottom wall of the receiving groove 45. By providing the 3 - 5 mm margin space, when this injection mold ejects the product, the gate can automatically fall off, avoiding manual secondary processing, improving production efficiency and product quality.

[0032] The cross-sectional area of the expansion slot 43 is larger than that of the insertion hole 41, and the cross-sectional area of the expansion slot 43 is smaller than that of the receiving groove 45.

[0033] In summary, the key design point of the present utility model lies in that by opening an expansion slot 43 at the bottom of the first ejector plate 20 and an accommodation slot 45 at the top surface of the second ejector plate 30, with the caliber of the accommodation slot 45 being larger than that of the expansion slot 43, the second ejector pin 42 does not move upward with the upward movement of the first ejector plate 20 but moves upward with the upward movement of the second ejector plate 30. In this way, while the injection mold realizes the ejection of the product, the sprue automatically falls off, avoiding secondary manual processing, improving production efficiency and product quality.

[0034] As described above, only the preferred embodiments of the present utility model are given, and no limitation is made to the technical scope of the present utility model. Therefore, any minor modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A product demoulding structure of an injection mold, comprising a B plate (10) and a first ejector plate (20) and a second ejector plate (30) arranged at the bottom of the B plate (10), characterized in that: The first ejector plate (20) is provided with a first ejector (21) extending into the B plate (10) and contacting the product cavity (11); the second ejector plate (30) is provided with a water outlet ejection structure (40); the contact end (a) of the water outlet ejection structure (40) extends into the water cavity (12) in the B plate (10); as the first ejector plate (20) and the second ejector plate (30) move toward the B plate (10) in sequence, the product in the product cavity (11) is separated from the glue in the water cavity (12).

2. The product demoulding structure of an injection mold according to claim 1, characterized in that: The water inlet ejection structure (40) comprises a through hole (41) formed on the first ejector plate (20), a second ejector (42) being inserted into the through hole (41), an upper end of the second ejector (42) extending into the water inlet (12), and the abutment end (a) being located at the upper end of the second ejector (42).

3. The product demoulding structure of the injection mold according to claim 2, characterized in that: An extension slot (43) recessed in the first ejector plate (20) is provided at one end of the insertion hole (41) opposite to the second ejector plate (30), and a limiting ring (44) overlapped in the extension slot (43) is connected to one end of the second ejector (42) located in the extension slot (43).

4. The product demoulding structure of the injection mold according to claim 3, characterized in that: The water inlet ejection structure (40) further comprises a receiving groove (45) provided on a side of the second ejector plate (30) opposite to the first ejector plate (20), wherein an ejector rod (46) is inserted into the receiving groove (45), and the ejector rod (46) corresponds to the limiting ring (44).

5. The product demoulding structure of the injection mold according to claim 4, characterized in that: The lower end of the ejector rod (46) is connected to a resisting rod (47), and the resisting rod (47) is inserted into the bottom of the second ejector plate (30) and resists the base.

6. The product demoulding structure of the injection mold according to claim 5, characterized in that: The cross-sectional area of ​​the abutment rod (47) is smaller than that of the push rod (46), and the push rod (46) fits in the inner cavity of the accommodation groove (45).

7. The product demoulding structure of an injection mold according to claim 4, characterized in that: When the top of the ejector rod (46) is parallel to the second ejector plate (30), a margin space of 3-5 mm exists between the bottom of the ejector rod (46) and the bottom wall of the accommodating groove (45).

8. The product demoulding structure of an injection mold according to claim 4, characterized in that: The cross-sectional area of ​​the expansion slot (43) is larger than that of the insertion hole (41), and the cross-sectional area of ​​the expansion slot (43) is smaller than that of the accommodating slot (45).

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