Injection mold
By designing slidingly connected front mold inserts and gate inlets in the injection mold, and using the elastic structure to cut the material rake, the problems of low production efficiency and low yield of existing injection molds are solved, and efficient production and high yield of high yield are achieved.
Patent Information
- Application Number
- CN202422389174.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-29
AI Technical Summary
After injection molding, existing injection molds need to be removed through subsequent processing, resulting in low production efficiency and low yield.
An injection mold is designed, including the front mold and the rear mold. The front mold insert is slidingly connected to the rear mold kernel, and the gate inlet is slidingly connected to the rear mold kernel. Through the elastic structure of the insert, the gate inlet is pushed to slide inward toward the front mold, cutting off the material rake inside the runner to avoid subsequent processing.
It realizes that the material rake can be cut without subsequent processing, shorten the production cycle, improve production efficiency, avoid damage to the product, and improve yield.
Smart Images
Figure CN223131256U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of molds, and particularly relates to an injection mold. Background Art
[0002] As an important molding and processing method, injection molding is applied in the fields of machinery, chemical industry, transportation, instrumentation, household appliances, medical treatment, etc. The processed products have the characteristics of high precision, high consistency, high production efficiency and low energy consumption, and have broad market demand and development prospects.
[0003] The injection mold is the core structure of injection molding. The cavity between the front mold and the rear mold of the injection mold is used for product molding. A runner for injecting materials into the cavity is provided between the front mold and the rear mold of the injection mold. After injection molding, the product formed inside the cavity is connected to the sprue formed at the runner. At present, the sprue on the product is mainly removed by manual, machining and other methods, which increases the production cycle of the product, resulting in relatively low production efficiency. Moreover, the subsequent processing operations for removing the sprue are likely to cause product defects, seriously affecting the product yield. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an injection mold, aiming at solving the problems of low production efficiency and low product yield caused by the need to remove the sprue through subsequent processing for the products formed by the existing injection molds.
[0005] The utility model discloses an injection mold, which comprises a front mold and a rear mold;
[0006] The front mold includes a front mold core and a front mold insert embedded on the front mold core and slidably connected to the front mold core along the direction of approaching / separating from the rear mold;
[0007] The rear mold includes a rear mold core. A cavity for product molding is provided between the rear mold core and the front mold insert. A runner communicating with the cavity is provided between the side surfaces of the rear mold core and the front mold core in contact with each other for injecting materials into the cavity;
[0008] It further includes a gate insert and an insert elastic structure. The gate insert is arranged on one side of the cavity adjacent to the runner and is slidably connected to the rear mold core along the direction of approaching / separating from the front mold. A gate for communicating the runner with the cavity is formed between the gate insert and the corresponding side of the front mold. The insert elastic structure is used to push the gate insert to slide towards the front mold to cut off the sprue formed inside the runner at the gate.
[0009] As an improvement, a guiding groove is provided on the rear mold insert along the moving direction of the gate insert, and the gate insert is slidably installed inside the guiding groove.
[0010] As an improvement, a limiting groove communicating with the guiding groove is provided on the side surface of the rear mold core away from the front mold core, and a limiting convex block inserted inside the limiting groove is provided on the gate insert.
[0011] As an improvement, a first gate groove is provided at the end of the gate insert close to the front mold, a second gate groove is correspondingly provided on the front mold, a gate is formed between the first gate groove and the second gate groove, and a cutting edge is formed at the notch of the first gate groove close to the cavity side.
[0012] As an improvement, the front mold further includes a front template, the front mold core is fixed to the front template, a butt block fixedly connected to the front template is embedded on the front mold core, and the second gate groove is provided at the end of the butt block close to the gate insert.
[0013] As an improvement, a receiving groove is provided on the front mold insert corresponding to the gate insert along the moving direction of the gate insert, the butt block is arranged inside the receiving groove, and the front mold insert is slidably connected with the butt block.
[0014] As an improvement, the gate insert can be inserted inside the receiving groove, and a distance is provided between the bottom surface of the guiding groove and the bottom surface of the receiving groove.
[0015] As an improvement, the rear mold further includes a rear mold insert embedded on the rear mold core, the rear mold insert is fixedly connected with the rear template, and the cavity is arranged between the rear mold insert and the front mold insert.
[0016] As an improvement, at least two front mold inserts are provided on the front mold core, a insert elastic structure for pushing the front mold insert to slide in the direction close to the rear mold is respectively provided at each front mold insert, and a cavity is respectively provided between the rear mold core and each front mold insert; at least two cavities are respectively communicated with the runner, a gate insert is respectively provided on the rear mold core corresponding to each cavity, and a gate is respectively formed between each gate insert and the corresponding side front mold.
[0017] As an improvement, a bracket is provided on the side of the rear mold core away from the front mold core, the gate insert is fixedly installed on the bracket, and the insert elastic structure is arranged between the bracket and the rear template.
[0018] Due to the adoption of the above technical solution, the injection mold of the present utility model includes a front mold and a rear mold; the front mold includes a front mold core and a front mold insert embedded on the front mold core and slidably connected to the front mold core in a direction close to / away from the rear mold; the rear mold includes a rear mold core, a cavity is provided between the rear mold core and the front mold insert for product molding, and a runner communicating with the cavity is provided between the side surfaces of the rear mold core and the front mold core in contact for injecting material into the cavity; it further includes a gate insert and an insert elastic structure. Among them, the gate insert is arranged on one side of the cavity close to the runner and is slidably connected to the rear mold core in a direction close to / away from the front mold, and a gate communicating the runner with the cavity is formed between the gate insert and the corresponding side of the front mold. The insert elastic structure is used to push the gate insert to slide in a direction close to the front mold to cut off the material rake formed inside the runner at the gate.
[0019] When the mold is opened, the power mechanism of the injection molding equipment drives the rear mold core to move away from the front mold, forming a gap between the front mold core and the rear mold core. Since the front mold insert is slidably connected to the front mold core in a direction close to / away from the rear mold, the elastic force of the insert elastic structure can push the front mold insert to move towards the rear mold side, so that the front mold insert fits on the rear mold core; since the gate insert is slidably connected to the rear mold core in a direction close to / away from the front mold, while the rear mold core moves, the elastic force of the insert elastic structure can push the gate insert to move towards the front mold. Relative movement occurs between the gate insert, the rear mold core, and the front mold insert. The front mold insert fits on the rear mold core under the elastic force of the insert elastic structure and can clamp the product between the front mold insert and the rear mold core. The relative movement between the gate insert, the rear mold core, and the front mold insert can form a cut, cutting off the material rake formed at the runner and the product formed inside the cavity at the position where the gate communicates with the cavity, thereby cutting off the material rake on the product. No subsequent processing steps are required, which can shorten the production cycle and improve production efficiency; moreover, after injection molding, the materials inside the runner and the cavity are not completely hardened, which is convenient to cut off between the material rake and the product, avoiding damage to the product and improving the product yield. The injection mold of the present utility model solves the problems of low production efficiency and low product yield of the existing injection mold where the product after injection molding needs to remove the material rake through subsequent processing. Description of the Drawings
[0020] Figure 1 is the three-dimensional structure diagram (one) of the injection mold of the present utility model;
[0021] Figure 2 is the exploded structure diagram of the injection mold of the present utility model;
[0022] Figure 3 is the three-dimensional structure diagram (two) of the injection mold of the present utility model;
[0023] Figure 4 is along Figure 1Schematic cross-sectional structure diagram along line A-A in [the figure];
[0024] Figure 5 is the schematic cross-sectional structure diagram of the injection mold of the present utility model during injection molding;
[0025] Figure 6 is the schematic cross-sectional structure diagram of the injection mold of the present utility model when cutting the material rake;
[0026] Figure 7 is Figure 6 the enlarged structure diagram at position B in [the figure];
[0027] Figure 8 is the three-dimensional structure diagram of the gate insert and the collision block of the injection mold of the present utility model;
[0028] Among them, 11 is the front mold core; 12 is the front mold insert; 121 is the accommodating groove; 13 is the insert spring; 21 is the rear mold core; 22 is the rear mold insert; 23 is the limiting groove; 30 is the runner; 31 is the gate; 40 is the gate insert; 41 is the first gate groove; 42 is the notch; 43 is the limiting protrusion; 50 is the cutting spring; 60 is the collision block; 61 is the second gate groove; 70 is the bracket; 81 is the product; 82 is the material rake. Detailed implementation manners
[0029] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0030] Figures 1 to 8 is the structural schematic diagram of the injection mold of the present utility model, among which, Figure 1 shows the three-dimensional structural schematic diagram (one) of the injection mold of the present utility model, Figure 2 shows the exploded structural schematic diagram of the injection mold of the present utility model, Figure 3 shows the three-dimensional structural schematic diagram (two) of the injection mold of the present utility model, Figure 4 shows along Figure 1 the schematic cross-sectional structure diagram along line A-A in [the figure], Figure 5 shows the schematic cross-sectional structure diagram of the injection mold of the present utility model during injection molding, Figure 6 shows the schematic cross-sectional structure diagram of the injection mold of the present utility model when cutting the material rake, Figure 7 shows Figure 6 the enlarged structure diagram at position B in [the figure], Figure 8 shows the three-dimensional structure diagram of the gate insert and the collision block of the injection mold of the present utility model. For the convenience of description, only the parts related to the present utility model are given in the figure.
[0031] It should be noted that the directional indications involved in the present utility model (such as up, down, front, back, etc.) are only used to explain the relative positional relationship between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly; for the descriptions such as "first", "second", etc. involved in the present utility model, these descriptions are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features.
[0032] As Figures 1 to 8 can be seen, the injection mold of the present utility model includes a front mold and a rear mold;
[0033] The front mold includes a front template (not shown in the figure), a front mold core 11 fixed on the front template, and a front mold insert 12 embedded on the front mold core 11 and slidably connected to the front mold core 11 in a direction close to / away from the rear mold. A insert elastic structure is provided between the front mold insert 12 and the front template for pushing the front mold insert 12 to slide in a direction close to the rear mold. Usually, the insert elastic structure is an insert spring 13;
[0034] The rear mold includes a rear template (not shown in the figure), a rear mold core 21 fixed on one side of the rear template close to the front mold core 11. A cavity for forming a product 81 is provided between the rear mold core 21 and the front mold insert 12, and a runner 30 communicating with the cavity is provided between the side surfaces of the rear mold core 21 and the front mold core 11 in contact for injecting materials into the cavity;
[0035] It further includes a gate insert 40 and an insert elastic structure. Among them, the gate insert 40 is arranged on one side of the cavity adjacent to the runner 30 and is slidably connected to the rear mold core 21 in a direction close to / away from the front mold. A gate 31 communicating the runner 30 with the cavity is formed between the gate insert 40 and the corresponding side of the front mold. The insert elastic structure is used to push the gate insert 40 to slide in a direction close to the front mold to cut off the material rake 82 formed inside the runner 30 at the gate 31. Usually, the insert elastic structure is a cutting spring 50.
[0036] For the convenience of understanding, the injection process is described as follows:
[0037] After the rear mold and the front mold are closed, materials are injected into the cavity through the runner 30, as Figure 5 shown.
[0038] When the mold is opened, as Figure 6As shown in the figure, the power mechanism of the injection molding equipment drives the rear template and the rear mold core 21 to move away from the front mold, forming a spacing between the front mold core 11 and the rear mold core 21. Since the front mold insert 12 is slidably connected to the front mold core 11 in the direction of approaching / separating from the rear mold, and a insert spring 13 is provided between the front mold insert 12 and the front template, the elastic force of the insert spring 13 can push the front mold insert 12 to move towards the rear mold side, so that the front mold insert 12 fits on the rear mold core 21. At the same time, since the gate insert 40 is slidably connected to the rear mold core 21 in the direction of approaching / separating from the front mold, when the rear template and the rear mold core 21 move, the elastic force of the cutting spring 50 can push the gate insert 40 to move towards the front mold. Relative movement occurs between the gate insert 40, the rear mold core 21, and the front mold insert 12. The front mold insert 12 fits on the rear mold core 21 under the elastic force of the insert spring 13 and can clamp the product 81 between the front mold insert 12 and the rear mold core 21. The relative movement between the gate insert 40, the rear mold core 21, and the front mold insert 12 can form a cut, cutting off the rake 82 formed at the runner 30 and the product 81 formed inside the cavity at the position where the gate 31 communicates with the cavity, thereby cutting off the rake 82 on the product 81. No subsequent processing steps are required, which can shorten the production cycle and improve production efficiency. Moreover, after injection molding, the rake 82 at the runner 30 and the product 81 inside the cavity are not completely hardened, making it easier to cut between the rake 82 and the product 81, avoiding damage to the product 81 and improving the product yield. The injection mold of the present utility model solves the problems of low production efficiency and low product yield of existing injection molds where the products formed by injection molding need to remove the rake through subsequent processing.
[0039] In the present utility model, in order to facilitate the stable sliding of the front mold insert 12 and avoid deflection during the sliding process, generally, two insert springs 13 are arranged at intervals.
[0040] In some other embodiments, the insert elastic structure between the front mold insert 12 and the front template can also be set as an elastic rubber column for pushing the front mold insert 12 to slide. Specifically, the elastic rubber column and the insert spring 13 are only some embodiments of the present utility model for realizing the sliding of the front mold insert 12.
[0041] In the present utility model, as Figure 2 、 Figure 3 and Figure 4 shown, the rear mold further includes a rear mold insert 22 embedded on the rear mold core 21. The rear mold insert 22 is fixedly connected to the rear template, and the cavity is arranged between the rear mold insert 22 and the front mold insert 12.
[0042] Specifically, a guiding groove is provided on the rear mold insert 22 along the moving direction of the gate insert 40, and the gate insert 40 is slidably installed inside the guiding groove to facilitate the movement of the gate insert 40.
[0043] In order to facilitate the control of the stroke of the gate insert 40, a limit groove 23 communicating with the guiding groove is provided on the side surface of the rear mold core 21 away from the front mold core 11, and a limit protrusion 43 inserted into the interior of the limit groove 23 is provided on the gate insert 40. When the gate insert 40 moves towards the front mold, a limiting structure can be formed between the limit protrusion 43 and the bottom surface of the limit groove 23, avoiding hard collision between the gate insert 40 and the front mold.
[0044] In the present utility model, a first gate groove 41 is provided at the end of the gate insert 40 close to the front mold, and a second gate groove 61 corresponding thereto is provided on the front mold. The bottom surface of the second gate groove 61 on the side away from the cavity is flush with the side wall of the corresponding side of the runner 30; when the mold is closed, the bottom surface of the first gate groove 41 on the side away from the cavity is flush with the side wall of the corresponding side of the runner 30, facilitating the flow of the material inside the runner 30. As shown in Figure 2 and Figure 4 , a gate 31 is formed between the first gate groove 41 and the second gate groove 61; when the mold is opened, a cutting edge is formed at the notch 42 on the side of the first gate groove 41 close to the cavity.
[0045] During injection molding, the power mechanism of the injection molding equipment drives the rear template and the rear mold core 21 to move towards the front mold. After the end of the gate insert 40 contacts the front mold, under the limitation of the front mold, it can push the gate insert 40 to move away from the front mold and compress the cutting spring 50. When the mold is closed, the bottom surface of the first gate groove 41 is flush with the side wall of the corresponding side of the runner 30, facilitating the flow of the injection molding material inside the runner 30 and flowing through the gate 31 into the cavity; when the mold is opened, the power mechanism of the injection molding equipment drives the rear template and the rear mold core 21 to move away from the front mold, forming a gap between the front mold core 11 and the rear mold core 21. The limitation of the front mold on the gate insert 40 disappears, and the elastic force of the cutting spring 50 pushes the gate insert 40 to move towards the front mold. Under the elastic force of the insert spring 13, the front mold insert 12 fits on the rear mold core 21, clamping the product 81 between the front mold insert 12 and the rear mold insert 22. When the gate insert 40 moves, the cutting edge formed at the notch 42 on the side of the first gate groove 41 close to the cavity can cut off the connection between the sprue 82 and the product 81.
[0046] Specifically, when the mold is closed, the bottom surface of the notch 42 is higher than the bottom surface of the cavity on the rear mold insert 22, as shown in Figure 4 , so that the connection between the sprue 82 and the product 81 can be made thinner, facilitating cutting.
[0047] In the present utility model, a butt block 60 fixedly connected to the front template is embedded on the front mold core 11. A second gate groove 61 is provided at the end of the butt block 60 close to the gate insert 40. During mold closing and cutting, the ends of the gate insert 40 and the butt block 60 will come into contact and collision, which can easily damage the injection mold. By separately providing the butt block 60, it is convenient to replace it when damage occurs, and the production cost can be reduced.
[0048] Specifically, a receiving groove 121 arranged along the moving direction of the gate insert 40 is provided on the front mold insert 12 corresponding to the gate insert 40. The butt block 60 is arranged inside the receiving groove 121, which can play a guiding role when the front mold insert 12 slides.
[0049] To facilitate cutting off between the rake 82 and the product 81, the gate insert 40 can be inserted into the receiving groove 121, and there is a spacing between the bottom surface of the guiding groove and the bottom surface of the receiving groove 121. As shown at the marked d in Figure 7 , after cutting, the gate insert 40 can smoothly insert into the receiving groove 121.
[0050] In the present utility model, at least two front mold inserts 12 are provided on the front mold core 11. A insert spring 13 is respectively provided between each front mold insert 12 and the front template. A cavity is respectively provided between the rear mold core 21 and each front mold insert 12; at least two cavities are respectively communicated with the runner 30. A gate insert 40 is respectively provided on the rear mold core 21 corresponding to each cavity. A gate 31 is respectively formed between each gate insert 40 and the corresponding side of the front mold.
[0051] Specifically, a rear mold insert 22 is respectively provided on the rear mold core 21 corresponding to each front mold insert 12. A cavity is respectively provided between the corresponding front mold insert 12 and the rear mold insert 22.
[0052] To facilitate installation and simultaneously cut off between the rake 82 and the products 81 inside each cavity, a bracket 70 is provided on the side of the rear mold core 21 away from the front mold core 11. The gate insert 40 is fixedly installed on the bracket 70. A cutting spring 50 is arranged between the bracket 70 and the rear template.
[0053] Generally, to facilitate the stable sliding of the gate insert 40 and avoid deflection of the bracket 70, at least two cutting springs 50 are arranged at intervals. Specifically, the number and arrangement position of the cutting springs 50 can be set according to actual usage requirements.
[0054] In some other embodiments, the insert elastic structure can also be set as an elastic rubber column. Specifically, the elastic rubber column and the cutting spring 50 are only some embodiments of the present utility model for realizing the sliding of the gate insert 40.
[0055] As Figure 1 shown, there are two front mold inserts 12. Of course, other quantities can also be set according to usage requirements.
[0056] The above are only some embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. An injection mold, comprising a front mold and a rear mold; characterized in that, the front mold includes a front mold core, and a front mold insert embedded on the front mold core and slidably connected to the front mold core along a direction close to / away from the rear mold; the rear mold includes a rear mold core. A cavity is provided between the rear mold core and the front mold insert for product molding. A runner communicating with the cavity is provided between the side surfaces of the rear mold core and the front mold core in contact with each other for injecting material into the cavity; It further includes a gate insert and an insert elastic structure. Among them, the gate insert is arranged on one side of the cavity adjacent to the runner, and is slidably connected to the rear mold core along a direction close to / away from the front mold. A gate communicating the runner and the cavity is formed between the gate insert and the corresponding side of the front mold. The insert elastic structure is used to push the gate insert to slide in the direction close to the front mold to cut off the material rake formed inside the runner at the gate.
2. The injection mold according to claim 1, characterized in that, A guiding groove is provided on the rear mold insert along the moving direction of the gate insert, and the gate insert is slidably installed inside the guiding groove.
3. The injection mold according to claim 2, characterized in that, A limiting groove communicating with the guiding groove is provided on one side surface of the rear mold core away from the front mold core. A limiting protrusion inserted into the limiting groove is provided on the gate insert.
4. The injection mold according to claim 2, characterized in that, A first gate groove is provided at the end of the gate insert close to the front mold. A corresponding second gate groove is provided on the front mold. A gate is formed between the first gate groove and the second gate groove. A cutting edge is formed at the notch of the first gate groove close to the cavity side.
5. The injection mold according to claim 4, wherein, The front mold further includes a front template. The front mold core is fixed to the front template. A butt block fixedly connected to the front template is embedded on the front mold core. The second gate groove is provided at the end of the butt block close to the gate insert.
6. The injection mold according to claim 5, characterized in that, A receiving groove is provided on the front mold insert corresponding to the gate insert along the moving direction of the gate insert. The butt block is arranged inside the receiving groove, and the front mold insert is slidably connected to the butt block.
7. The injection mold according to claim 6, wherein, The gate insert can be inserted into the receiving groove, and there is a spacing between the bottom surface of the guiding groove and the bottom surface of the receiving groove.
8. The injection mold according to claim 1, wherein, The rear mold further includes a rear mold insert embedded on the rear mold core. The rear mold insert is fixedly connected to the rear template. The cavity is provided between the rear mold insert and the front mold insert.
9. The injection mold according to any one of claims 1 to 8, characterized in that, At least two front mold inserts are provided on the front mold core. An insert elastic structure for pushing each front mold insert to slide in the direction close to the rear mold is respectively provided at each front mold insert. A cavity is respectively provided between the rear mold core and each front mold insert; at least two cavities are respectively communicated with the runner. A gate insert is respectively provided on the rear mold core corresponding to each cavity. A gate is respectively formed between each gate insert and the corresponding side of the front mold.
10. The injection mold according to claim 9, wherein A bracket is provided on the side of the rear mold core away from the front mold core. The gate insert is fixedly installed on the bracket, and the insert elastic structure is arranged between the bracket and the rear template.