Injection mold for a flash lamp housing

Abstract

The utility model discloses a kind of injection mould of flash lamp cover shell, it is related to injection mould technical field, including front mould and back mould, the front mould and back mould mutually butt joint form the mold cavity for forming product;Injection runner is equipped between the front mould and back mould, the injection runner includes sequentially connected main runner, primary runner and secondary runner, the end of the secondary runner away from primary runner is connected with mold cavity intercommunication;First connecting fulcrum is formed between the main runner and primary runner, second connecting fulcrum is formed between the primary runner and secondary runner, the connecting place of the secondary runner and mold cavity forms gate portion, the side of the back mould away from front mould is connected with ejection mechanism, the ejection mechanism has respectively butt joint in first connecting fulcrum, second connecting fulcrum and gate portion first ejector pin, second ejector pin and third ejector pin;Product forming precision is improved, and production continuity and product quality stability are considered.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for a flashlight cover housing. Background Technology

[0002] In the field of injection molding production of strobe lamp housings, injection molds are the core equipment for achieving mass production. Currently, although conventional injection molds for strobe lamp housings can complete basic injection molding, they have significant shortcomings in actual production.

[0003] During the injection molding of the flashlight cover housing, molten material needs to fill multiple mold cavities through a runner system to form the product. After molding, the product and the runner waste are connected as one piece. Existing mold ejection mechanisms only design for ejecting the product during the ejection process; the ejection of the runner waste lacks effective coordination with the product ejection, easily leading to uneven ejection force distribution. Furthermore, the gate, as a crucial component connecting the product and the runner, has structural design flaws in existing technology. During ejection, some products often cannot withstand the ejection force at the gate, making it difficult to move synchronously with the runner waste. Consequently, these products remain trapped in the mold cavity and cannot be carried out with the runner waste, severely impacting production continuity and efficiency.

[0004] Therefore, optimizing the ejection mechanism of injection molds to achieve smooth and synchronous ejection of products and runner waste has become an urgent technical problem to be solved. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0006] An injection mold for a flashlight housing includes a front mold and a rear mold, which are joined together to form a mold cavity for molding the product. An injection runner is provided between the front mold and the rear mold. The injection runner includes a main runner, a primary runner, and a secondary runner connected in sequence. The end of the secondary runner away from the primary runner is connected to the mold cavity. A first connecting fulcrum is formed between the main runner and the primary runner, a second connecting fulcrum is formed between the primary runner and the secondary runner, a gate is formed at the connection between the secondary runner and the mold cavity, and an ejection mechanism is connected to the side of the rear mold away from the front mold. The ejection mechanism has a first ejector pin, a second ejector pin, and a third ejector pin respectively docked to the first connecting fulcrum, the second connecting fulcrum, and the gate. The upper and lower ends of the gate are respectively formed with a first thickened portion and a second thickened portion.

[0007] As a further embodiment of this utility model: the secondary flow channel includes a first flow branch section and a second flow branch section that are distributed in a U-shape; The first and second branch sections meet at the same end and are connected to the end of the primary flow channel. The other end of the first branch section is connected to one of the gate sections, and the other end of the second branch section is connected to another gate section. The first and second branch sections are symmetrically distributed on both sides of the axis of the primary flow channel, forming a bidirectional branch structure.

[0008] As a further embodiment of this utility model: the primary flow channel includes multiple channels, one end of each primary flow channel is connected to the end of the main flow channel, forming a radial distribution structure centered on the end of the main flow channel, and the other end of each primary flow channel is respectively connected to the secondary flow channel.

[0009] As a further embodiment of this utility model: the front mold is provided with a first groove that is adapted to the first thickened part, and the first groove is used to limit the forming of the first thickened part.

[0010] As a further embodiment of this utility model: a second groove adapted to the second thickened part is provided on the rear mold, and the second groove is used to limit the forming of the second thickened part.

[0011] As a further embodiment of this utility model: the top end of the third ejector pin is connected to the second thickened portion located in the second groove of the rear mold, and the central axis of the third ejector pin coincides with the central axis of the second thickened portion.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention features a multi-segment injection runner system in the injection mold, comprising a main runner, a primary runner, and a secondary runner. It is equipped with first, second, and third ejector pins that connect to the first and second connecting points and the gate, respectively. Combined with the design of first and second thickened sections at the upper and lower ends of the gate, and a first groove on the front mold to accommodate the first thickened section and a second groove on the rear mold to accommodate the second thickened section, this design achieves simultaneous and stable ejection of runner waste and the product through the coordinated action of the ejector pins. The first and second thickened sections enhance the gate's strength to prevent gate damage or product retention during ejection. Furthermore, the radially distributed primary runner and the U-shaped bidirectional secondary runner ensure uniform distribution of molten material, improving product molding accuracy and balancing production continuity with product quality stability.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the lower mold structure in this utility model; Figure 3 yes Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the structure of the injection molding runner waste and the product in this utility model; Figure 5 This is a cross-sectional structural schematic diagram of this utility model from one perspective; Figure 6 This is a cross-sectional structural schematic diagram from another perspective of this utility model.

[0016] The reference numerals and names in the figure are as follows: 1. Front mold; 2. Rear mold; 3. Mold cavity; 4. Main runner; 5. Primary runner; 6. Secondary runner; 7. First connecting support point; 8. Second connecting support point; 9. Gate; 10. First ejector pin; 11. Second ejector pin; 12. Third ejector pin; 13. First thickened part; 14. Second thickened part; 15. First sub-running section; 16. Second sub-running section; 17. First slot; 18. Second slot. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-6 In this embodiment of the present invention, an injection mold for a flashlight housing is provided. The mold includes a front mold 1 and a rear mold 2, wherein the front mold 1 and the rear mold 2 can be connected to each other, and after connection, they form a mold cavity 3 for molding the product.

[0019] An injection runner is provided between the front mold 1 and the rear mold 2. The injection runner includes a main runner 4, a primary runner 5, and a secondary runner 6 connected in sequence. The end of the secondary runner 6 away from the primary runner 5 is connected to the mold cavity 3. In this way, during the injection molding process, the molten material can pass through the main runner 4, the primary runner 5, and the secondary runner 6 in sequence, and finally flow into the mold cavity 3 to complete the molding of the product.

[0020] A first connecting point 7 is formed between the main runner 4 and the primary runner 5, and a second connecting point 8 is formed between the primary runner 5 and the secondary runner 6. A gate 9 is formed at the connection between the secondary runner 6 and the mold cavity 3. Simultaneously, an ejection mechanism is connected to the side of the rear mold 2 away from the front mold 1. This ejection mechanism has a first ejector pin 10, a second ejector pin 11, and a third ejector pin 12, which are respectively connected to the first connecting point 7, the second connecting point 8, and the gate 9. When the product is formed and the ejection mechanism is activated, the first ejector pin 10, the second ejector pin 11, and the third ejector pin 12 apply ejection forces to the first connecting point 7, the second connecting point 8, and the gate 9, respectively, so that the runner waste and the product can be ejected from the mold together. It is understood that the product itself has corresponding ejector pins for ejection.

[0021] To enhance the structural strength of the gate section 9, a first thickened portion 13 and a second thickened portion 14 are formed at the upper and lower ends of the gate section 9, respectively. By providing these two thickened portions, damage to the gate section 9 due to excessive force during the ejection process can be effectively avoided, thereby ensuring that the product can be ejected synchronously with the runner waste.

[0022] The secondary runner 6 includes a first branch section 15 and a second branch section 16 arranged in a U-shape. The first branch section 15 and the second branch section 16 meet at the same end and connect to the end of the primary runner 5. The other end of the first branch section 15 connects to a gate section 9, and the other end of the second branch section 16 connects to another gate section 9. Furthermore, the first branch section 15 and the second branch section 16 are symmetrically distributed on both sides of the axis of the primary runner 5, forming a bidirectional flow distribution structure. This structural design allows the molten material in the primary runner 5 to flow through the two branch sections to different gate sections 9, and then enter the corresponding mold cavity 3, which helps to improve the uniformity of material distribution among the mold cavities 3.

[0023] The primary runner 5 comprises multiple runners, one end of which converges and connects to the end of the main runner 4, forming a radial distribution structure centered on the end of the main runner 4. The other end of each primary runner 5 is connected to a secondary runner 6. In this way, the molten material in the main runner 4 can be dispersed and flow to each secondary runner 6 through the multiple radially distributed primary runners 5, and then enter the corresponding mold cavity 3 through the secondary runners 6. This can meet the requirement of simultaneous molding of multiple mold cavities 3, which helps to improve production efficiency.

[0024] A first groove 17 adapted to the first thickened portion 13 is provided on the front mold 1. The first groove 17 is used to limit the forming of the first thickened portion 13 during the forming process to ensure that the first thickened portion 13 can be accurately formed according to the preset shape. Correspondingly, a second groove 18 adapted to the second thickened portion 14 is provided on the rear mold 2. The second groove 18 is used to limit the forming of the second thickened portion 14 during the forming process, which can also ensure the forming accuracy of the second thickened portion 14.

[0025] The top of the third ejector pin 12 is aligned with the second thickened portion 14 located in the second slot 18 of the rear mold 2, and the central axis of the third ejector pin 12 coincides with the central axis of the second thickened portion 14. This arrangement allows the ejection force applied by the third ejector pin 12 to be transmitted along the central axis of the second thickened portion 14, ensuring both the stability and accuracy of the ejection force, and effectively preventing the ejection effect from being affected by force misalignment during the ejection process.

[0026] The gate section 9 has a first thickened portion 13 and a second thickened portion 14 formed at its upper and lower ends, respectively. By providing these two thickened portions, damage to the gate section 9 due to excessive force during ejection can be effectively prevented, thus ensuring that the product can be ejected synchronously with the runner waste. At the same time, a certain gap is left between the first thickened portion 13, the second thickened portion 14 and the product. This gap facilitates the subsequent gate breakage operation, making it easy to separate the runner waste from the product after ejection.

[0027] In summary, this utility model, by setting a multi-segment injection runner including a main runner 4, a primary runner 5, and a secondary runner 6 in the injection mold, and matching it with a first ejector pin 10, a second ejector pin 11, and a third ejector pin 12 respectively connecting to the first connecting support point 7, the second connecting support point 8, and the gate 9, combined with the design of the first thickened part 13 and the second thickened part 14 at the upper and lower ends of the gate 9, and the first groove 17 on the front mold 1 that adapts to the first thickened part 13 and the second groove 18 on the rear mold 2 that adapts to the second thickened part 14, can achieve synchronous and stable ejection of runner waste and product through the synergistic action of each ejector pin, strengthen the gate 9 through the first thickened part 13 and the second thickened part 14 to avoid gate damage or product retention during ejection, and ensure uniform distribution of molten material through the radially distributed primary runner 5 and the U-shaped bidirectional secondary runner 6, thereby improving product molding accuracy and taking into account both production continuity and product quality stability.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An injection mold for a flashlight housing, characterized in that, It includes a front mold and a rear mold, which are joined together to form a mold cavity for molding products; An injection runner is provided between the front mold and the rear mold. The injection runner includes a main runner, a primary runner, and a secondary runner connected in sequence. The end of the secondary runner away from the primary runner is connected to the mold cavity. A first connecting fulcrum is formed between the main runner and the primary runner, a second connecting fulcrum is formed between the primary runner and the secondary runner, a gate is formed at the connection between the secondary runner and the mold cavity, and an ejection mechanism is connected to the side of the rear mold away from the front mold. The ejection mechanism has a first ejector pin, a second ejector pin, and a third ejector pin respectively docked to the first connecting fulcrum, the second connecting fulcrum, and the gate. The upper and lower ends of the gate are respectively formed with a first thickened portion and a second thickened portion.

2. The injection mold for a flash lamp housing according to claim 1, characterized in that, The secondary flow channel includes a first and second branching sections arranged in a U-shape. The first and second branch sections meet at the same end and are connected to the end of the primary flow channel. The other end of the first branch section is connected to one of the gate sections, and the other end of the second branch section is connected to another gate section. The first and second branch sections are symmetrically distributed on both sides of the axis of the primary flow channel, forming a bidirectional branch structure.

3. The injection mold for a flash lamp housing according to claim 1 or 2, characterized in that, The primary flow channel includes multiple channels, with one end of each channel converging and connecting to the end of the main flow channel, forming a radial distribution structure centered on the end of the main flow channel. The other end of each primary flow channel is respectively connected to the secondary flow channel.

4. The injection mold for a flash lamp housing according to claim 1, characterized in that, The front mold has a first groove that matches the first thickened part, and the first groove is used to limit the forming of the first thickened part.

5. The injection mold for a flash lamp housing according to claim 4, characterized in that, The rear mold has a second groove that matches the second thickened part, and the second groove is used to limit the forming of the second thickened part.

6. The injection mold for a flash lamp housing according to claim 5, characterized in that, The top end of the third ejector pin is connected to the second thickened portion located in the second groove of the rear mold, and the central axis of the third ejector pin coincides with the central axis of the second thickened portion.

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