Ejector-pin-free mold demolding structure

Abstract

The utility model relates to the technical field of injection molds, in particular to a thimble-free mold demolding structure which comprises an upper mold unit and a lower mold unit, the upper mold unit comprises a panel, a water gap mold, a plate A and an upper mold core, an upper mold insert is arranged in the upper mold core, and the upper mold insert is fixedly connected with the plate A; and the lower mold unit comprises a bottom plate, a plate B and a lower mold core fixed on the plate B. According to the utility model, an ejector pin is not required to be designed for demolding of a product, and the holding force on the product is removed by ingeniously moving the upper mold insert and the lower mold insert in the demolding process, so that after the upper mold core is separated from the lower mold core, the product can be conveniently taken out, and the production efficiency is improved. According to the design, the manufacturing process of the mold is simplified, the mold thickness is reduced, meanwhile, the demolding smoothness of a product can be kept, the production cost is greatly reduced, the overall structural design is simple and reasonable, and the applicability of an existing mold is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a demoulding structure of a mold without an ejector pin. Background Art

[0002] An injection mold is a mold used for injection molding. It usually consists of two parts: an upper mold and a lower mold. There is a cavity between the upper and lower molds for injecting molten plastic material. When the plastic material cools and solidifies, the mold opens and the molded part is removed from the mold. Injection molds are widely used in various industries, such as automobiles, electronics, home appliances, medical devices, etc. They are a vital part of the injection molding process and can produce plastic products of various shapes and sizes.

[0003] Most of the current injection molds use an ejector plate to drive the ejector and the push tube to eject the product. When the mold is opened, the product is first separated from the cavity and then ejected to separate the product from the core. For example, Chinese patent announcement No. "CN103407123A" discloses an inverted mold demolding ejector structure.

[0004] Due to the structural design of built-in ejector demolding, appearance defects such as whitening and deformation are prone to occur on the product surface when the product is ejected, which not only affects the product quality, but also increases the mold manufacturing cost. In order to further improve the applicability of existing molds, we propose a mold demolding structure without ejector pins. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art that when ejecting products, the product surface is prone to whitening, deformation and other appearance defects, which affects the product quality, and proposes a demoulding structure of a mold without an ejector pin.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A ejector-free mold demoulding structure is designed, comprising an upper mold unit and a lower mold unit, wherein the upper mold unit comprises a panel, a nozzle mold, an A plate and an upper mold core, wherein an upper mold insert is arranged inside the upper mold core, and the upper mold insert is fixedly connected to the A plate;

[0008] The lower mold unit includes a bottom plate, a B plate, and a lower mold core fixed on the B plate, wherein a lower mold insert penetrating into the lower mold core is fixed above the bottom plate.

[0009] Furthermore, a forming rod is fixedly installed below the nozzle mold, and the bottom of the forming rod is penetrated by the A plate and the upper mold core in sequence.

[0010] Furthermore, the lower mold insert is fixed to the bottom plate via a fastener, and a molding edge is provided at the upper end of the lower mold insert.

[0011] Furthermore, cooling water channels are provided inside the upper mold core and the lower mold core, and both ends of the cooling water channels penetrate to the outer sides of the upper mold core and the lower mold core and are connected with joints.

[0012] Furthermore, it also includes a side top mechanism, which is arranged below the A plate and is used to cooperate with the upper mold core and the lower mold core to form the product. The B plate is provided with a driving component that drives the side top mechanism to move.

[0013] Furthermore, the side push mechanism includes a slide table sliding under the A plate, and a side push rod is fixed on the side of the slide table, wherein the end of the side push rod extends between the upper mold core and the lower mold core.

[0014] Furthermore, the driving component includes a fixed seat fixed on the B plate, a wedge table is fixedly installed on the end face of the fixed seat, the side of the slide is provided with an inclined surface adapted to the wedge table, an inclined hole is opened inside the slide, and an inclined rod is fixedly installed on the inner side of the fixed seat.

[0015] The utility model proposes a demoulding structure of a mold without an ejector pin, and the utility model has the beneficial effect that: in the demoulding of the product, there is no need to design an ejector pin, and the upper mold insert and the lower mold insert are cleverly moved during the demoulding process to remove the holding force on the product, so that when the upper mold core and the lower mold core are separated, the product can be easily taken out. Such a design not only simplifies the manufacturing process of the mold, reduces the thickness of the mold, but also maintains the smoothness of product demoulding, greatly reduces the production cost, and the overall structural design is simple and reasonable, further improving the applicability of the existing mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of area A.

[0019] In the figure: 1. upper mold unit; 11. panel; 12. nozzle mold; 13. A plate; 14. upper mold core; 15. upper mold insert; 16. forming rod; 2. lower mold unit; 21. bottom plate; 22. B plate; 23. lower mold core; 24. lower mold insert; 25. forming edge; 3. joint; 4. side push mechanism; 41. slide; 42. side push rod; 43. inclined surface; 44. inclined hole; 5. product; 6. driving component; 61. fixed seat; 62. wedge platform; 63. inclined rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-3 An embodiment of the utility model discloses a demoulding structure of a mold without ejector pins, the mold structure includes an upper mold unit 1 and a lower mold unit 2, the upper mold unit 1 includes a panel 11, a nozzle mold 12, an A plate 13 and an upper mold core 14, an upper mold insert 15 is arranged inside the upper mold core 14, and the upper mold insert 15 is fixedly connected to the A plate 13, wherein the panel 11, the nozzle mold 12, the A plate 13 and the upper mold core 14 can move independently of each other to facilitate demoulding movement, and the assembly structure is a prior art and will not be described in detail here;

[0022] Furthermore, the lower mold unit 2 in the present embodiment includes a base plate 21, a B plate 22, and a lower mold core 23 fixed on the B plate 22, wherein a lower mold insert 24 penetrating into the lower mold core 23 is fixed above the base plate 21. Of course, the base plate 21, the B plate 22, and the lower mold core 23 in the present embodiment can also move independently of each other for perfect cooperation in demolding the product 5.

[0023] In some embodiments, in the embodiments of the utility model, a forming rod 16 is fixedly installed below the nozzle mold 12, and the bottom of the forming rod 16 passes through the A plate 13 and the upper mold core 14 in sequence.

[0024] Furthermore, in this embodiment, the lower mold insert 24 is fixed to the base plate 21 by fasteners, and a molding edge 25 is provided at the upper end of the lower mold insert 24. Of course, in this embodiment, a molding edge 25 is also provided at the bottom of the molding rod 16, and its purpose is to realize molding of the interior of the product 5. At the same time, after the injection molding is completed, it can be separated from it by the molding rod 16 to realize demolding of the product 5.

[0025] In some embodiments, in order to achieve rapid cooling of the product 5 after the injection molding is completed, the upper mold core 14 and the lower mold core 23 in the utility model are provided with cooling water channels, and both ends of the cooling water channels pass through the outer sides of the upper mold core 14 and the lower mold core 23 and are connected with joints 3. The provided joints 3 are used to connect external circulating cooling water. After the injection molding is completed, the upper mold core 14 and the lower mold core 23 can be cooled by circulating cooling water, which improves the cooling efficiency of the product 5.

[0026] On the basis of the above embodiment, the utility model also includes a side top mechanism 4, which is arranged below the A plate 13 and is used to cooperate with the upper mold core 14 and the lower mold core 23 to form the product 5. The B plate 22 is provided with a driving component 6 for driving the side top mechanism 4 to move.

[0027] In a preferred embodiment, the side push mechanism 4 in the utility model includes a slide 41 sliding under the A plate 13, and a side push rod 42 is fixed on the side of the slide 41, wherein the end of the side push rod 42 extends between the upper mold core 14 and the lower mold core 23. It should be pointed out that in this embodiment, the end of the side push rod 42 also has a molding edge, which is used to mold the outer side surface of the product 5. The side push rod 42 is driven to move horizontally by the left and right movement of the slide 41, so that during injection molding, the side push rod 42 can move outward to remove the clamping force on the product 5.

[0028] Furthermore, the driving component 6 includes a fixed seat 61 fixed on the B plate 22, a wedge platform 62 is fixedly installed on the end surface of the fixed seat 61, a side of the slide 41 is provided with an inclined surface 43 adapted to the wedge platform 62, an inclined hole 44 is opened inside the slide 41, and an inclined rod 63 is fixedly installed on the inner side of the fixed seat 61. When the mold is actually closed, the inclined hole 44 and the inclined rod 63 cooperate to drive the slide 41 to move laterally. Secondly, the cooperation between the wedge platform 62 and the inclined surface 43 can also play a guiding and limiting role, thereby ensuring that in the closed mold state, the side push rod 42 can be inserted between the upper mold core 14 and the lower mold core 23 to complete the injection molding of the product 5.

[0029] During demoulding, first control the sprue mold 12 to move upward, at which time the sprue mold 12 will drive the forming rod 16 to move upward, and then the control panel 11 will move upward. After the action is completed, open the bottom plate 21, and the bottom plate 21 will drive the lower mold insert 24 to move downward and separate from the product 5, thereby removing the clamping force on the lower side of the product 5. Further open the A plate 13 to pull out the upper mold insert 15, so that the upper mold insert 15 is separated from the upper side of the product 5 to remove the clamping force on the upper side of the product 5. Finally, the upper mold core 14 and the lower mold core 23 are opened to take out the product 5.

[0030] In summary, there is no need to design a ejector pin for demolding the product 5 in the utility model. The upper mold insert 15 and the lower mold insert 24 are cleverly moved during the demolding process to remove the clamping force on the product 5, so that after the upper mold core 15 and the lower mold core 14 are separated, the product 5 can be easily taken out. Such a design not only simplifies the manufacturing process of the mold, but also reduces the thickness of the mold while maintaining the smoothness of product demolding, thereby greatly reducing production costs.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ejector pin-free mold demoulding structure, comprising an upper mold unit (1) and a lower mold unit (2), characterized in that: The upper mold unit (1) comprises a panel (11), a nozzle mold (12), an A plate (13) and an upper mold core (14); an upper mold insert (15) is arranged inside the upper mold core (14); and the upper mold insert (15) is fixedly connected to the A plate (13); The lower mold unit (2) comprises a bottom plate (21), a B plate (22), and a lower mold core (23) fixed on the B plate (22), wherein a lower mold insert (24) penetrating into the lower mold core (23) is fixed above the bottom plate (21).

2. The ejector-free mold demoulding structure according to claim 1, characterized in that: A forming rod (16) is also fixedly installed below the nozzle mold (12), and the A plate (13) and the upper mold core (14) are sequentially penetrated through the bottom of the forming rod (16).

3. The ejector-free mold demoulding structure according to claim 1, characterized in that: The lower mold insert (24) is fixed to the bottom plate (21) via a fastener, and a molding edge (25) is provided at the upper end of the lower mold insert (24).

4. The ejector pin-free mold demoulding structure according to claim 1, characterized in that: The upper mold core (14) and the lower mold core (23) are both provided with cooling water channels, and both ends of the cooling water channels penetrate to the outside of the upper mold core (14) and the lower mold core (23) and are connected to joints (3).

5. The ejector pin-free mold demoulding structure according to claim 1, characterized in that: It also includes a side top mechanism (4), which is arranged below the A plate (13) and is used to cooperate with the upper mold core (14) and the lower mold core (23) to form the product (5), and the B plate (22) is provided with a driving component (6) for driving the side top mechanism (4) to move.

6. The ejector pin-free mold demoulding structure according to claim 5, characterized in that: The side push mechanism (4) comprises a slide table (41) sliding under the A plate (13), and a side push rod (42) is fixed on the side of the slide table (41), wherein the end of the side push rod (42) extends between the upper mold core (14) and the lower mold core (23).

7. The ejector-free mold demoulding structure according to claim 6, characterized in that: The driving component (6) includes a fixed seat (61) fixed on the B plate (22), a wedge platform (62) is fixedly installed on the end surface of the fixed seat (61), a side edge of the slide (41) is provided with an inclined surface (43) adapted to the wedge platform (62), an inclined hole (44) is opened inside the slide (41), and an inclined rod (63) is fixedly installed on the inner side of the fixed seat (61).

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