Sliding type core-pulling injection mold

Abstract

The utility model discloses a sliding type core-pulling injection mold which comprises a lower mold and an upper mold, the upper mold covers the lower mold, and an injection molding pipe is mounted on the upper mold; the mounting block is inserted into the upper end of the upper die, and a core-pulling rod is mounted in the middle of the mounting block; the blocking mechanism is arranged below the lower die and can be suitable for core-pulling rods with different thicknesses, and the situation that the space exists between the core-pulling rods and the bottom of the lower die is avoided; and the quick extraction mechanism is mounted in the core-pulling rod and can cool the core-pulling rod, so that injection molding material adhesion in the process of extracting the core-pulling rod is avoided. According to the sliding type core-pulling injection mold, no distance exists between the core-pulling rod and the lower mold, the normal injection molding effect cannot be affected, the core-pulling injection mold can be adjusted according to the shape of an injection molding product, then the core-pulling injection mold can be made into a plurality of injection molding products through injection molding, the application range of the core-pulling injection mold is widened, and the production efficiency is improved. And a plurality of injection molds are not needed to manufacture different injection products.

Description

Technical Field

[0001] The utility model relates to the technical field of core-pulling injection molds, in particular to a sliding core-pulling injection mold. Background Art

[0002] Moulds are used in industrial production to obtain the required products by injection molding, blow molding, extrusion, die-casting or forging, smelting, stamping and other methods. Injection moulds are used to produce plastic products. Injection moulding is achieved by pouring. The plastic product is taken out after the upper and lower parts of the injection mould are separated. Some plastic products have undercuts or grooves in different directions, and a core-pulling structure is required to form them.

[0003] For example, a stable core-pulling mechanism of a two-color injection mold with publication number CN218053720U, a core-pulling mechanism is arranged through the top of the upper mold, an adsorption ring is arranged at the bottom of the core-pulling mechanism, a core groove is arranged at the top of the lower mold, an electromagnetic seat is arranged on the inner side of the core groove, a support plate is arranged at the top of the core-pulling mechanism, and a plurality of inserts are evenly distributed at the bottom of the support plate.

[0004] The core pulling mechanism can be used to achieve core pulling. The core pulling mechanism is directly inserted into the corresponding hole on the lower mold. Different plastic products have different shapes and structures. When the core pulling mechanism with a smaller diameter is inserted into the hole, there will be a gap between the outside of the core pulling mechanism and the hole. The gap will affect the molding of the plastic product, which will result in a core pulling injection mold being only suitable for making plastic products of one specification. Different plastic products require corresponding molds, which greatly increases the production cost. Utility Model Content

[0005] The purpose of the utility model is to provide a sliding core-pulling injection mold to solve the problem raised in the above background technology that a core-pulling injection mold on the market is only suitable for making plastic products of one specification, and different plastic products require corresponding molds, which greatly increases the production cost.

[0006] To achieve the above object, the utility model provides the following technical solution: a sliding core-pulling injection mold, comprising: a lower mold and an upper mold, the upper mold covers the upper part of the lower mold, and an injection tube is installed on the upper mold;

[0007] It also includes: a mounting block, which is inserted into the upper end of the upper die, and a core pulling rod is installed in the middle of the mounting block;

[0008] The blocking mechanism is arranged below the lower die. Through the setting of the blocking mechanism, core pulling rods of different thicknesses can be used to avoid a gap between the core pulling rod and the bottom of the lower die;

[0009] The quick withdrawal mechanism is installed inside the core pulling rod, which can cool the core pulling rod to avoid the injection plastic from sticking during the process of withdrawing the core pulling rod.

[0010] Preferably, docking seats are installed at the four lower corners of the upper mold, the outer side of the docking seats is in contact with the outer side of the lower mold, and a limiting hole is provided at the bottom of the lower mold.

[0011] Preferably, the blocking mechanism comprises a stopper and a movable plate, the stopper is inserted into the limiting hole, and a detachable movable plate is mounted on the lower end of the stopper.

[0012] Preferably, the outer side of the stop block and the inner side of the limiting hole fit together, a mounting hole with the same outer diameter as the core pulling rod is opened inside the stop block, the movable plate and the lower mold are threadedly connected, and magnets with a diameter smaller than the mounting hole are adhered to the lower end of the core pulling rod and the top of the movable plate, and the upper and lower magnets attract each other.

[0013] Preferably, the quick extraction mechanism comprises a side cavity, a hollow cavity and a through hole, the core pulling rod is provided with a hollow cavity and a side cavity inside, the side cavity is arranged in a circular ring structure, and a through hole is provided between the side cavity and the hollow cavity.

[0014] Preferably, a water inlet pipe is installed in the middle position above the core-pulling rod, a water pump is installed on the water inlet pipe, a water outlet pipe is installed at a position corresponding to the upper cavity of the core-pulling rod, and an inverted "U"-shaped handle is installed on the mounting block.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model is provided with a movable plate and a stopper, the outer sides of the stopper are fitted with the inner sides of the limiting holes, the stopper and the movable plate are detachable, the stopper and the limiting holes are always kept in fit, the stopper can be replaced according to core pulling rods of different diameters, there is no spacing between the core pulling rod and the lower mold, and the normal injection molding effect will not be affected. The core pulling injection mold can be adjusted according to the shape of the injection molded product, so that the core pulling injection mold can be injection molded into multiple injection molded products, so that the use range of the core pulling injection mold is expanded, and multiple injection molds are not required to produce different injection molded products.

[0017] 2. The utility model is provided with a hollow cavity, a side cavity and a through hole, and the through hole connects the hollow cavity and the side cavity, and cooling water enters into the hollow cavity and flows into the side cavity through the through hole. The cooling water fills the inside of the side cavity to cool the core pulling rod. In the process of pulling out the core pulling rod, no injection plastic will adhere to the outer surface, so that the injection molded product is prevented from being deformed during the pulling process, and the core can be pulled quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the main cross-sectional structure of the lower mold of the utility model;

[0020] Figure 3 This is a schematic diagram of the main cross-sectional structure of the installation block of the utility model;

[0021] Figure 4 This is a schematic diagram of the top-sectional structure of the core-pulling rod of the utility model;

[0022] Figure 5 For this utility model Figure 4 Enlarged structural diagram at A in the middle.

[0023] In the figure: 1. lower mold; 2. limiting hole; 3. upper mold; 4. docking seat; 5. mounting block; 6. water outlet pipe; 7. water inlet pipe; 8. water pump; 9. core pulling rod; 10. moving plate; 11. stopper; 12. hollow cavity; 13. magnet; 14. through hole; 15. handle; 16. side cavity. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 5 , the utility model provides the following technical solutions:

[0026] A sliding core-pulling injection mold comprises: a lower mold 1 and an upper mold 3, wherein the upper mold 3 covers the upper part of the lower mold 1, and an injection tube is installed on the upper mold 3; it also comprises: a mounting block 5, which is inserted into the upper end of the upper mold 3, and a core-pulling rod 9 is installed in the middle of the mounting block 5; docking seats 4 are installed at the four corners below the upper mold 3, and the outer side of the docking seats 4 is in contact with the outer side of the lower mold 1, and a limiting hole 2 is provided at the bottom of the lower mold 1, and a magnet 13 with a diameter smaller than the mounting hole is adhered to the lower end of the core-pulling rod 9 and the upper part of the movable plate 10, and the upper and lower magnets 13 attract each other.

[0027] The upper mold 3 is covered on the top of the lower mold 1. During the process of covering the upper mold 3, the docking seat 4 needs to be aligned with the side of the lower mold 1. The setting of the docking seat 4 can stabilize the upper mold 3 to prevent the upper mold 3 from shaking. The upper mold 3 slides between the docking seat 4 and the lower mold 1 during the covering process or separation. The mounting block 5 is inserted into the interior of the upper mold 3, and the core pulling rod 9 is inserted into the interior of the mounting hole. The upper and lower magnets 13 attract and contact each other to limit the core pulling rod 9. Then, the material is injected into the mold through the injection tube. After the injection is completed, the mold is cooled by the cooling mechanism on the outside, so that the mold and the injection molded product can be better demolded.

[0028] The quick withdrawal mechanism is installed inside the core pulling rod 9, which can cool the core pulling rod 9 to avoid adhesion of the injection plastic during the process of withdrawing the core pulling rod 9; the quick withdrawal mechanism includes a side cavity 16, a hollow cavity 12 and a through hole 14. The core pulling rod 9 is provided with a hollow cavity 12 and a side cavity 16. The side cavity 16 is a circular ring structure. A through hole 14 is provided between the side cavity 16 and the hollow cavity 12. A water inlet pipe 7 is installed in the middle position above the core pulling rod 9, and a water pump 8 is installed on the water inlet pipe 7. A water outlet pipe 6 is installed at the position corresponding to the side cavity 16 on the core pulling rod 9, and an inverted "U"-shaped handle 15 is installed on the mounting block 5.

[0029] Before the core pulling rod 9 is pulled out, cooling water is introduced into the core pulling rod 9 through the water inlet pipe 7, and the water pump 8 allows the cooling water to enter the hollow cavity 12. The cooling water then enters the side cavity 16 through the through hole 14, and the cooling water cools the core pulling rod 9. The cooled cooling water flows out through the water outlet pipe 6, and the cooling water flows between the hollow cavity 12 and the side cavity 16 to quickly cool the core pulling rod 9, thereby allowing the core pulling rod 9 to be quickly separated from the injection molded product, preventing the injection molding material from sticking during the process of pulling out the core pulling rod 9, and keeping the injection molded product intact.

[0030] A blocking mechanism is arranged below the lower mold 1. Through the setting of the blocking mechanism, core pulling rods 9 of different thicknesses can be used to avoid a gap between the core pulling rod 9 and the bottom of the lower mold 1. The blocking mechanism includes a stopper 11 and a movable plate 10. The stopper 11 is inserted into the limiting hole 2. A detachable movable plate 10 is installed at the lower end of the stopper 11. The outer side of the stopper 11 and the inner side of the limiting hole 2 are fitted together. A mounting hole with the same outer diameter as the core pulling rod 9 is opened inside the stopper 11. The movable plate 10 is threadedly connected to the lower mold 1.

[0031] When the core pulling rod 9 needs to be replaced according to the injection molded product, the handle 15 is lifted upward by hand. The process of lifting the handle 15 upward drives the mounting block 5 and the core pulling rod 9 to move upward synchronously until the core pulling rod 9 is completely pulled out. The movable plate 10 is rotated by hand. The movable plate 10 moves downward synchronously during the rotation, and the movable plate 10 is separated from the lower mold 1. Then, the stopper 11 is removed, and the stopper 11 corresponding to the mounting hole of the core pulling rod 9 is installed on the movable plate 10. Then, the stopper 11 is inserted into the limiting hole 2 and the movable plate 10 is rotated in the opposite direction. , until the movable plate 10 cannot be rotated, at this time the upper end of the stopper 11 is flush with the upper end of the limiting hole 2, the outer side of the stopper 11 is fitted with the limiting hole 2, the outlet pipe 6 and the inlet pipe 7 are disassembled and installed on the new core pulling rod 9, and then the whole is inserted into the upper mold 3, the core pulling rod 9 is inserted into the interior of the mounting hole, and at the same time the outer side of the core pulling rod 9 is fitted with the interior of the mounting hole, there is no spacing between the mounting hole and the core pulling rod 9, which will not affect the production of injection molded products, and one mold can produce injection molded products of different specifications, so that the use range of the mold is expanded.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sliding core-pulling injection mold, comprising: A lower mold (1) and an upper mold (3), wherein the upper mold (3) covers the upper part of the lower mold (1), and an injection molding tube is installed on the upper mold (3); It is characterized by further comprising: A mounting block (5) is inserted into the upper end of the upper mold (3), and a core pulling rod (9) is installed in the middle of the mounting block (5); A blocking mechanism is arranged below the lower die (1). Through the arrangement of the blocking mechanism, core pulling rods (9) of different thicknesses can be used to avoid a gap between the core pulling rod (9) and the bottom of the lower die (1); The quick extraction mechanism is installed inside the core pulling rod (9) and can cool the core pulling rod (9) to avoid the injection molding material from sticking during the process of extracting the core pulling rod (9).

2. A sliding core-pulling injection mold according to claim 1, characterized in that: A docking seat (4) is installed at each of the four lower corners of the upper mold (3), the outer side of the docking seat (4) is in contact with the outer side of the lower mold (1), and a limiting hole (2) is provided at the bottom of the lower mold (1).

3. A sliding core-pulling injection mold according to claim 1, characterized in that: The blocking mechanism comprises a stopper (11) and a movable plate (10); the stopper (11) is inserted into the interior of the limiting hole (2); and a detachable movable plate (10) is mounted at the lower end of the stopper (11).

4. A sliding core-pulling injection mold according to claim 3, characterized in that: The outer side of the stopper (11) and the inner side of the limiting hole (2) are fitted together, and a mounting hole having the same outer diameter as the core pulling rod (9) is provided inside the stopper (11). The movable plate (10) and the lower mold (1) are threadedly connected, and magnets (13) having a diameter smaller than the mounting hole are adhered to the lower end of the core pulling rod (9) and the upper part of the movable plate (10), and the upper and lower magnets (13) attract each other.

5. The sliding core-pulling injection mold according to claim 1, characterized in that: The quick extraction mechanism comprises a side cavity (16), a hollow cavity (12) and a through hole (14); the hollow cavity (12) and the side cavity (16) are provided inside the core pulling rod (9); the side cavity (16) is provided in a circular ring structure; and a through hole (14) is provided between the side cavity (16) and the hollow cavity (12).

6. The sliding core-pulling injection mold according to claim 1, characterized in that: A water inlet pipe (7) is installed at the middle position above the core pulling rod (9), a water pump (8) is installed on the water inlet pipe (7), a water outlet pipe (6) is installed at a position corresponding to the upper cavity (16) of the core pulling rod (9), and an inverted "U"-shaped handle (15) is installed on the mounting block (5).

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