Anti-sticking safety helmet injection mold

Abstract

The anti-sticking safety helmet injection mold comprises an upper injection mold body and a lower injection mold body, the upper injection mold body is arranged over the lower injection mold body, a forming cavity is formed in the bottom of the upper injection mold body, a male mold core is fixedly connected to the top of the lower injection mold body, and an upper lining body is fixedly connected to the inner wall of the forming cavity. The top of the male die core is fixedly connected with a lower lining body, the bottom edge of the upper lining body abuts against the top edge of the lower lining body, and a hollow interlayer is formed between the upper lining body and the lower lining body. The upper lining body and the lower lining body are respectively arranged on the upper injection mold and the lower injection mold, and the nano coatings are arranged on the inner surface of the upper lining body and the outer surface of the lower lining body, so that the surface smoothness of the upper lining body and the lower lining body can be obviously improved, the friction coefficient is reduced, and plastic adhesion is prevented; and meanwhile, the upper lining body and the lower lining body which are made of wear-resistant materials are not easy to wear and are favorable for keeping smooth, so that plastic adhesion is further prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an anti-sticking safety helmet injection mold. Background Art

[0002] As an important safety protection product, safety helmets are widely used in all walks of life. With the improvement of safety awareness, the demand for safety helmets is also increasing. Therefore, improving the production efficiency of safety helmets and reducing production costs have become important issues facing manufacturers. Injection molding of safety helmets is a common and efficient production process. However, in traditional injection molds, the sticking problem has always been a key factor affecting production efficiency and product quality. Due to the large adhesion between the plastic material and the mold surface, plastic parts are often difficult to demold smoothly from the mold after injection molding. This not only prolongs the production cycle and increases production costs, but may also cause damage or deformation to the product surface, affecting the appearance and quality of the product. Therefore, the development of injection molds with anti-sticking functions is of great significance to improving production efficiency and product quality.

[0003] When some existing injection molds are in use, an ejection mechanism is provided on them, and the injection-molded parts are ejected by the ejection mechanism. However, the ejection mechanism only plays a single mechanical pushing function and cannot avoid the sticking between the injection-molded parts and the mold. Pushing the sticky injection-molded parts by the ejection mechanism can easily cause defects on the surface of the injection-molded parts.

[0004] For example, an anti-sticking injection mold disclosed in the announcement number CN219427329U, at the end of injection molding, the front mold assembly and the rear mold assembly are opened, and the insert ejection mechanism drives the mold core insert to slide outward to a protruding state, and then pushes the injection molded workpiece away from the front mold assembly to prevent the injection molded workpiece from sticking to the front mold assembly, thereby completing the demolding operation of the injection molded workpiece and the front mold assembly.

[0005] However, the ejection mechanism of the patent only has a single mechanical ejection function, which cannot prevent the sticking between the injection molded workpiece and the mold. The ejection mechanism pushes the sticky injection molded workpiece, which is easy to cause defects on the surface of the injection molded workpiece.

[0006] Therefore, it is necessary to invent a kind of anti-sticking helmet injection mold to solve the above problems. Utility Model Content

[0007] The utility model aims to provide an anti-sticking helmet injection mold to solve the problems in the above technology.

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-sticking safety helmet injection mold, comprising an injection molding upper mold and an injection molding lower mold, the injection molding upper mold is arranged directly above the injection molding lower mold, a molding cavity is provided at the bottom of the injection molding upper mold, a punch is fixedly connected to the top of the injection molding lower mold, an upper lining is fixedly connected to the inner wall of the molding cavity, a lower lining is fixedly connected to the top of the punch, the bottom edge of the upper lining is abutted against the top edge of the lower lining, a hollow interlayer is formed between the upper lining and the lower lining, a receiving groove is provided inside the punch, a telescopic rod is installed inside the receiving groove, the top of the telescopic rod is fixedly connected to the bottom of the lower lining, a spring is sleeved on the outside of the telescopic rod, one end of the spring is abutted against the bottom of the receiving groove, and the other end of the spring is abutted against the bottom of the lower lining.

[0009] The upper lining body and the lower lining body are used to replace the injection upper mold and the injection lower mold to contact the injection molded part. The injection molded part is not easy to stick to the upper lining body and the lower lining body, thereby facilitating demoulding of the injection molded part.

[0010] Preferably, the upper lining body and the lower lining body are both made of wear-resistant material, and the inner surface of the upper lining body and the outer surface of the lower lining body are both provided with a nano coating.

[0011] Nano coating can significantly improve the surface finish of the upper and lower linings, thereby reducing the friction coefficient and preventing plastic sticking. At the same time, the upper and lower linings made of wear-resistant materials are not easily worn, which helps to maintain smoothness, thereby further preventing plastic sticking.

[0012] Preferably, a pouring gate is installed on the top of the injection upper mold, and a guide hole is opened on the top of the upper lining body, and the guide hole is arranged directly below the pouring gate.

[0013] The molten plastic is injected into the mold through the gate.

[0014] Preferably, a flow channel is provided inside the injection upper mold, one end of the flow channel is connected to the pouring port, and the other end of the flow channel is connected to the guide hole.

[0015] The molten plastic can enter the hollow interlayer between the upper lining body and the lower lining body through the flow channel and the guide hole.

[0016] Preferably, positioning piles are fixedly connected to the four corners of the bottom of the upper injection mold, and positioning holes are opened at the four corners of the surface of the lower injection mold, and the positioning piles match the positioning holes.

[0017] After the positioning piles are plugged and matched with the positioning holes, the dislocation and deviation between the injection upper mold and the injection lower mold can be prevented.

[0018] Preferably, both ends of the injection upper mold are fixedly connected with a slide plate, and both ends of the injection lower mold are fixedly connected with an end plate, and the end plate is arranged directly below the slide plate.

[0019] The end plates are used to carry the guide rods.

[0020] Preferably, a guide rod is fixedly connected to the top of the end plate, the guide rod passes through the slide plate, and the slide plate is slidably connected to the guide rod.

[0021] The slide plate can slide up and down along the guide rod to facilitate guiding the upper injection mold and the lower injection mold to close the mold.

[0022] Preferably, the four corners of the surfaces of the upper injection mold and the lower injection mold are all rounded, and the edges of the slide plate and the end plate are also rounded.

[0023] Chamfering can make sharp corners smooth, thereby improving the safety of mold use.

[0024] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0025] 1. By arranging an upper lining on the inner wall of the molding cavity of the injection upper mold and arranging a lower lining on the top of the punch of the injection lower mold, since the inner surface of the upper lining and the outer surface of the lower lining are both provided with nano coatings, the surface finish of the upper lining and the lower lining can be significantly improved, thereby reducing the friction coefficient and preventing plastic sticking. At the same time, the upper lining and the lower lining made of wear-resistant materials are not easy to wear, which is conducive to keeping smoothness, thereby further preventing plastic sticking;

[0026] 2. After the injection mold and the injection mold are opened, the lower lining will be separated from the extrusion of the upper lining, and the lower lining will be lifted upward under the push of the spring, thereby lifting the injection molded part high, making it convenient for the staff to take the injection molded part. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model when the upper injection mold and the lower injection mold are molded together;

[0028] Figure 2 It is a schematic diagram of the overall structure of the utility model when the upper injection mold and the lower injection mold are opened;

[0029] Figure 3 It is a structural cross-sectional view of the utility model when the injection upper mold and the injection lower mold are molded together;

[0030] Figure 4 This is an exploded view of the structure of the injection mold of the utility model;

[0031] Figure 5 It is a structural explosion diagram of the lower injection mold of the utility model.

[0032] Description of reference numerals:

[0033] 1. Injection upper mold; 2. Injection lower mold; 3. Molding cavity; 4. Punch core; 5. Upper lining; 6. Lower lining; 7. Hollow interlayer; 8. Receiving groove; 9. Telescopic rod; 10. Spring; 11. Pouring gate; 12. Positioning pile; 13. Positioning hole; 14. Slide plate; 15. End plate; 16. Guide rod. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] The utility model provides Figure 1-5 The anti-sticking helmet injection mold shown in the figure includes an injection upper mold 1 and an injection lower mold 2. The injection upper mold 1 is arranged directly above the injection lower mold 2. A molding cavity 3 is opened at the bottom of the injection upper mold 1. A punch core 4 is fixedly connected to the top of the injection lower mold 2. An upper lining 5 is fixedly connected to the inner wall of the molding cavity 3. A lower lining 6 is fixedly connected to the top of the punch core 4. The bottom edge of the upper lining 5 abuts against the top edge of the lower lining 6. A hollow interlayer 7 is formed between the upper lining 5 and the lower lining 6. A receiving groove 8 is opened inside the punch core 4. A telescopic rod 9 is installed inside the receiving groove 8. The top of the telescopic rod 9 is fixedly connected to the bottom of the lower lining 6. A spring 10 is sleeved on the outside of the telescopic rod 9. One end of the spring 10 abuts against the bottom of the receiving groove 8, and the other end of the spring 10 abuts against the bottom of the lower lining 6.

[0036] In one aspect of the present embodiment, the upper lining 5 and the lower lining 6 are both made of wear-resistant materials, the inner surface of the upper lining 5 and the outer surface of the lower lining 6 are both provided with a nano coating, a pouring port 11 is installed on the top of the injection mold 1, a guide hole is opened on the top of the upper lining 5, and the guide hole is arranged directly below the pouring port 11, a flow channel is opened inside the injection mold 1, one end of the flow channel is connected to the pouring port 11, and the other end of the flow channel is connected to the guide hole, the four corners of the bottom of the injection mold 1 are fixedly connected with positioning piles 12, and the surface of the injection mold 2 is provided with a plurality of guide holes. Positioning holes 13 are provided at the four corners of the surface, and the positioning piles 12 match the positioning holes 13. Both ends of the injection upper mold 1 are fixedly connected with slide plates 14, and both ends of the injection lower mold 2 are fixedly connected with end plates 15. The end plates 15 are arranged directly below the slide plates 14, and the tops of the end plates 15 are fixedly connected with guide rods 16. The guide rods 16 penetrate the slide plates 14, and the slide plates 14 are slidably connected to the guide rods 16. The four corners of the surfaces of the injection upper mold 1 and the injection lower mold 2 are chamfered, and the edges of the slide plates 14 and the end plates 15 are also chamfered.

[0037] Working principle of this utility model:

[0038] Refer to the instruction manual Figure 1-5When using the utility model, first push the injection mold 1 downward along the guide rod 16 until the injection mold 1 abuts against the injection mold 2, at which time the positioning pile 12 is plugged and matched with the positioning hole 13, and then inject molten plastic into the mold through the pouring port 11, and the molten plastic enters the hollow interlayer 7 between the upper liner 5 and the lower liner 6 through the runner and the guide hole until the hollow interlayer 7 is filled, and then stand for a period of time to wait for the plastic to cool and set;

[0039] Since the inner wall of the molding cavity 3 of the injection upper mold 1 is provided with an upper lining 5, the top of the male mold core 4 of the injection lower mold 2 is provided with a lower lining 6, and the inner surface of the upper lining 5 and the outer surface of the lower lining 6 are provided with a nano coating, the surface finish of the upper lining 5 and the lower lining 6 can be significantly improved, thereby reducing the friction coefficient and preventing plastic from sticking. At the same time, the upper lining 5 and the lower lining 6 made of wear-resistant materials are not easy to wear, which is conducive to keeping smoothness, thereby further preventing plastic from sticking;

[0040] After cooling is completed, the injection mold 1 is lifted upward. Since the injection molded part will not stick to the surface of the upper lining 5 and the lower lining 6, the injection molded part will remain on the surface of the lower lining 6 under the action of its own gravity. After losing the extrusion of the upper lining 5, the lower lining 6 will be lifted upward by the spring 10, thereby lifting the injection molded part high, making it convenient for the staff to take the injection molded part.

Claims

1. An anti-sticking helmet injection mold, comprising an injection upper mold (1) and an injection lower mold (2), characterized in that: The injection upper mold (1) is arranged directly above the injection lower mold (2); a molding cavity (3) is provided at the bottom of the injection upper mold (1); a punch (4) is fixedly connected to the top of the injection lower mold (2); an upper lining (5) is fixedly connected to the inner wall of the molding cavity (3); a lower lining (6) is fixedly connected to the top of the punch (4); a bottom edge of the upper lining (5) abuts against the top edge of the lower lining (6); a hollow interlayer (7) is formed between the upper lining (5) and the lower lining (6); a receiving groove (8) is provided inside the punch (4); a telescopic rod (9) is installed inside the receiving groove (8); the top end of the telescopic rod (9) is fixedly connected to the bottom of the lower lining (6); a spring (10) is sleeved on the outside of the telescopic rod (9); one end of the spring (10) abuts against the bottom of the receiving groove (8); and the other end of the spring (10) abuts against the bottom of the lower lining (6).

2. The anti-sticking helmet injection mold according to claim 1, characterized in that: The upper lining (5) and the lower lining (6) are both made of wear-resistant materials, and the inner surface of the upper lining (5) and the outer surface of the lower lining (6) are both provided with nano coatings.

3. The anti-sticking helmet injection mold according to claim 1, characterized in that: The top of the injection upper mold (1) is provided with a pouring port (11), and the top of the upper lining (5) is provided with a guide hole, wherein the guide hole is arranged directly below the pouring port (11).

4. The anti-sticking helmet injection mold according to claim 3, characterized in that: A flow channel is provided inside the injection upper mold (1), one end of the flow channel is connected to the pouring port (11), and the other end of the flow channel is connected to the guide hole.

5. The anti-sticking helmet injection mold according to claim 1, characterized in that: The four corners of the bottom of the injection upper mold (1) are fixedly connected with positioning piles (12), and the four corners of the surface of the injection lower mold (2) are opened with positioning holes (13), and the positioning piles (12) match the positioning holes (13).

6. The anti-sticking helmet injection mold according to claim 1, characterized in that: Both ends of the injection upper mold (1) are fixedly connected to a slide plate (14), and both ends of the injection lower mold (2) are fixedly connected to an end plate (15), and the end plate (15) is arranged directly below the slide plate (14).

7. The anti-sticking helmet injection mold according to claim 6, characterized in that: A guide rod (16) is fixedly connected to the top of the end plate (15), the guide rod (16) is arranged to penetrate the slide plate (14), and the slide plate (14) is slidably connected to the guide rod (16).

8. The anti-sticking helmet injection mold according to claim 6, characterized in that: The four corners of the surfaces of the injection upper mold (1) and the injection lower mold (2) are all chamfered, and the edges of the slide plate (14) and the end plate (15) are also chamfered.

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