Injection molding tool
By setting multiple injection runners and guide rails in the injection molding fixture, and equipping it with oil-driven components and circulating runners, the problem of incomplete product separation caused by wear of the gate cutting structure is solved, thereby improving injection molding quality and production efficiency and reducing scrap rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NUOBO AUTOMOTIVE PARTS (TAIZHOU) CO LTD
- Filing Date
- 2025-04-11
- Publication Date
- 2026-05-15
AI Technical Summary
In existing injection molding processes, the gate cutting structure of the slider wears down due to frequent friction, making it difficult to completely separate the product from the gate, which affects product quality and increases the scrap rate.
An injection molding fixture was designed, in which a first slider and a second slider, together with a base, form a product cavity. Multiple injection channels and guide rails are provided to ensure that the injection material flows smoothly into the cavity. The gate cutting structure is detachable. The guide rails are equipped with oil-driven components and circulation channels to provide lubrication and guidance, ensuring the stability of the sliders and the reliability of the gate cutting.
This achieves complete separation of the product from the gate, reduces product scrap rate, improves injection molding quality and production efficiency, reduces friction and wear and flow resistance, and ensures the normal working performance of the mold.
Smart Images
Figure CN224240247U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tooling technology for injection molding, and in particular to an injection molding tooling. Background Technology
[0002] Injection molding is a method in which hot melt plastic material is injected into a mold cavity of the desired shape. After the plastic material cools and solidifies, the mold is opened and the solidified plastic material is ejected to obtain the molded product. It is widely used in the field of plastic product manufacturing.
[0003] Furthermore, in order to ensure product quality, existing plastic products are usually demolded by using a sliding block to cut the connection between the product and the gate. However, due to the frequent cutting operations, the gate cutting structure on the sliding block is constantly subjected to impact and friction. Over time, its cutting edge gradually wears down and becomes dull.
[0004] Therefore, in the subsequent cutting process, it is difficult to completely separate the product from the gate, resulting in inevitable residue at the separation point. This severely affects the appearance quality of the product, making it unable to meet the expected quality standards and leading to an increased product scrap rate. Utility Model Content
[0005] In view of this, the present invention aims to provide an injection molding tooling to reduce the scrap rate of products.
[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:
[0007] An injection molding fixture includes a base, and a first slider and a second slider slidably disposed on the base;
[0008] The first slider includes a slider body and a detachable gate cutting structure disposed on the slider body;
[0009] The first slider and the second slider can slide and abut against the base, forming a product cavity with the base. The first injection channel on the gate cutting structure can communicate with the product cavity, and the gate cutting structure and the second slider can form a second injection channel.
[0010] One end of the second injection channel is connected to the first injection channel, and the other end forms a pouring port. The third injection channel on the base can be connected to the second injection channel, and the second slider is provided with a fourth injection channel connected to the second injection channel.
[0011] Furthermore, along the flow direction of the injection molding material within the first injection molding channel, the cross-sectional area of the first injection molding channel gradually decreases.
[0012] Furthermore, the extension direction of the second injection channel intersects the sliding direction of the first slider, and the sliding direction of the second slider is opposite to the sliding direction of the first slider.
[0013] Furthermore, the fourth injection channel is arranged to intersect with the second injection channel; and / or, the third injection channel is arranged to intersect with the fourth injection channel.
[0014] Furthermore, the base is provided with a first through hole that communicates with the third injection molding channel. The length direction of the third injection molding channel and the first through hole are consistent. A ejector pin that slides along the length direction of the first through hole is provided in the first through hole.
[0015] Furthermore, the extension length of the fourth injection channel is more than twice the diameter of the connection between the first injection channel and the product cavity.
[0016] Furthermore, the bottom of the first slider is provided with a first groove, and the base is provided with a first guide rail adapted to the first groove. The first guide rail is embedded in the first groove and can guide the first slider to slide relative to the base; and / or, the bottom of the second slider is provided with a second groove, and the base is provided with a second guide rail adapted to the second groove. The second guide rail is embedded in the second groove and can guide the second slider to slide relative to the base.
[0017] Furthermore, both the first guide rail and the second guide rail are provided with oil chambers and multiple second through holes communicating with the oil chambers. The multiple second through holes are arranged at intervals along the length direction of the first guide rail or the second guide rail. An oil driving component is provided in the oil chamber, which can drive the oil in the oil chamber to flow out from the second through holes.
[0018] Furthermore, the oil drive assembly includes a rotating shaft rotatably disposed within the oil chamber and a helical blade disposed on the rotating shaft; both the first guide rail and the second guide rail are provided with drive motors, the drive motors and the rotating shafts are in one-to-one correspondence, and the rotating shafts are connected to the output ends of the corresponding drive motors.
[0019] Furthermore, both the first guide rail and the second guide rail are provided with circulation channels, and the circulation channels and the oil cavity extend along the length direction of the first guide rail or the second guide rail; the two ends of the circulation channels are respectively connected to the oil cavity.
[0020] Compared with the prior art, this utility model has the following advantages:
[0021] The injection molding fixture of this utility model, with a first slider, a second slider, and a base forming a product cavity, is connected to the product cavity via a first injection runner. The first, second, third, and fourth injection runners are interconnected, ensuring smooth flow of the injection material into the product cavity and providing a stable material supply for product molding. After the product is filled and molded, the first slider slides, causing its gate cutting structure to sever the connection between the product and the gate. Simultaneously, the gate cutting structure in the first slider is detachably mounted on the slider body. This design facilitates replacement of the gate cutting structure when it wears, thus preventing residue during separation of the product and injection material, ensuring product appearance quality, and reducing product scrap rate.
[0022] By gradually reducing the cross-sectional area of the first injection runner, the flow rate of the injection material can be increased, ensuring that the material is quickly filled into the product cavity, reducing filling time, and thus improving production efficiency. At the same time, it can also overcome the flow resistance of the injection material, allowing it to pass smoothly through the first injection runner and fill every corner of the product cavity, reducing molding defects such as short shots and material shortages caused by poor material flow, and improving the molding quality of the product.
[0023] The extension direction of the second injection runner intersects with the sliding direction of the first slider. This forces the injection material entering the second injection runner from the sprue to change direction during flow, breaking the limitation of the injection material flowing in a single direction, reducing flow resistance, and thus preventing eddies or stagnation of the injection material, thereby improving mold filling efficiency and injection quality. Simultaneously, the second slider slides in the opposite direction to the first slider, ensuring a tight fit between them when the mold is closed, preventing leakage of injection material during the injection process.
[0024] The arrangement of the fourth injection runner intersecting with the second injection runner allows the injection material in the fourth injection runner to counteract the cutting force of the gate cutting structure when the gate cutting structure cuts the connection between the product and the injection material in the first injection runner. This prevents the injection material in the first injection runner from rotating, ensuring complete separation between the product and the gate and guaranteeing the product's appearance quality. At the same time, it also prevents the rotational stress generated during the shearing process from damaging the gate cutting structure.
[0025] Furthermore, the intersecting arrangement of the third and fourth injection runners allows some of the injection material to enter the third injection runner from the second injection runner, thus making the injection material in the third injection runner a stable anchor point. As a result, when the gate cutting structure moves with the first slider, it can counteract the pulling force of the first slider on the injection material, so that the stress during gate cutting is concentrated at the connection between the first injection runner and the product cavity, thereby ensuring a smooth fracture surface and improving the product qualification rate.
[0026] By designing the ejector pins and ensuring they directly act on the injection material within the third injection runner, a uniform ejection force can be applied after the product separates from the injection material. This allows the solidified injection material to detach smoothly from the base, enabling rapid removal of solidified material, shortening the entire injection molding cycle, and allowing the mold to proceed to the next injection cycle more quickly, thus improving production efficiency. Simultaneously, the first through-hole is connected to the third injection runner, and the sliding of the ejector pins also helps remove any residual material and impurities from the first through-hole, ensuring unobstructed flow in the runner and through-hole, and maintaining the normal operating performance of the mold.
[0027] Setting the extension length of the fourth injection runner to be more than twice the diameter of the connection between the first injection runner and the product cavity ensures that a portion of the injection material remains within the fourth injection runner when the first and second sliders slide, thus forming a rigid support. This distributes the cutting force of the gate cutting structure and ensures the stability of the cutting process.
[0028] The matching relationship between the first guide rail and the first slide groove provides guidance for the sliding of the first slider relative to the base, and the matching relationship between the second guide rail and the second slide groove provides guidance for the sliding of the second slider relative to the base. This allows the first and second sliders to slide along specific paths, so that the first and second sliders can accurately abut and form the product cavity. At the same time, the design of the guide rail and slide groove can also prevent the first and second sliders from deviating or shaking, improve the stability of the sliding of the first and second sliders, and thus improve the quality of the injection molded product.
[0029] The oil cavity design allows for the storage of lubricating oil, and the oil-driven assembly enables multiple second through-holes on the first guide rail to release lubricating oil onto the contact surface between the first guide rail and the first slide groove, forming a lubricating film between them. This effectively reduces the friction between the first slider and the first guide rail during sliding, minimizing heat and wear caused by friction, thereby extending the service life of both the first guide rail and the first slider. Furthermore, the multiple second through-holes are spaced along the length of the guide rail to ensure that the lubricating oil evenly covers the entire sliding path, preventing insufficient or excessive lubrication in certain areas.
[0030] The hydraulic drive assembly consists of a rotating shaft and helical blades. Its simple structure facilitates design and implementation. By driving the rotating shaft to rotate, the helical blades rotate accordingly, thus utilizing the helical propulsion principle to continuously push the oil in the oil chamber along the length of the first guide rail, forming a stable oil flow. This ensures that the oil can efficiently flow out from the second through hole, providing stable lubrication between the first guide rail and the first slider. Simultaneously, the rotating shaft is connected to the output end of the drive motor, allowing the drive motor to actively control the oil flow rate and volume, preventing oil leakage or contamination due to over-lubrication. Furthermore, the first and second guide rails are each equipped with independent drive motors, allowing for individual adjustment of the oil output according to the actual movement requirements of the first and second sliders.
[0031] By designing a circulating flow channel, the oil within the oil chamber can circulate. When the oil drive assembly propels the oil out of the second through holes in the first guide rail to lubricate the first guide rail and the first slider, excess oil flows back into the oil chamber and enters the circulating flow channel, achieving oil recycling. This avoids significant oil loss and waste, reducing the operating costs of the injection molding fixture. Simultaneously, it also reduces the maintenance workload caused by frequent oil additions. Attached Figure Description
[0032] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:
[0033] Figure 1 This is a schematic diagram of the overall structure of the injection molding tooling described in this embodiment of the utility model;
[0034] Figure 2 For along Figure 1 Sectional view of line AA in the middle;
[0035] Figure 3 For along Figure 1 Sectional view of the middle BB line;
[0036] Figure 4 for Figure 2 Enlarged view of the structure shown at point C;
[0037] Figure 5 for Figure 3 Enlarged view of the structure shown at point D;
[0038] Figure 6 This is a schematic diagram of the contact between the first slider and the second slider according to an embodiment of the present utility model;
[0039] Figure 7 This is a schematic diagram of the structure of the base described in an embodiment of the present utility model;
[0040] Figure 8 This is a schematic diagram of the structure of the second slider according to an embodiment of the present utility model;
[0041] Figure 9 for Figure 8 Enlarged view of the structure shown at point E in the middle;
[0042] Figure 10 This is a schematic diagram of the structure of the second guide rail according to an embodiment of the present invention;
[0043] Figure 11 for Figure 10 A schematic diagram of the structure shown from another perspective.
[0044] Explanation of reference numerals in the attached figures:
[0045] 1. Base; 11. First slider; 111. First slide groove; 12. Second slider; 121. Second slide groove; 13. First through hole; 131. Ejector pin; 14. First guide rail; 15. Second guide rail; 16. Base body; 17. Support block;
[0046] 21. Slider body; 22. Gate cutting structure; 221. Bolt;
[0047] 31. Product cavity; 311. First product cavity; 312. Second product cavity; 32. First injection runner; 33. Second injection runner; 331. Gating port; 34. Third injection runner; 35. Fourth injection runner; 36. Connecting runner; 37. Connecting port;
[0048] 41. Oil chamber; 42. Second through hole; 43. Oil drive assembly; 431. Rotating shaft; 432. Spiral blade; 44. Circulation channel; 45. Drive motor. Detailed Implementation
[0049] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0050] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.
[0051] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0052] Taking the injection molding fixture described in this utility model as an example, the orientations used in the embodiments, such as "up, down, left, right, front, rear," are based on... Figure 1 The vertical (also known as the height direction), horizontal (also known as the width direction), and front-back (also known as the length direction) directions in the shown state are defined based on the reference.
[0053] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.
[0054] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0055] This embodiment relates to an injection molding fixture that can completely separate the product from the gate, avoiding residue at the separation point, thereby ensuring the appearance quality of the product and reducing the scrap rate.
[0056] In terms of overall structure, combined Figures 1 to 5 As shown, the injection molding fixture of this embodiment includes a base 1, and a first slider 11 and a second slider 12 slidably disposed on the base 1. The first slider 11 includes a slider body 21 and a detachable gate cutting structure 22 disposed on the slider body 21.
[0057] Furthermore, the first slider 11 and the second slider 12 can slide and abut against the base 1, forming a product cavity 31 together with the base 1. The first injection channel 32 on the gate cutting structure 22 can communicate with the product cavity 31, and the gate cutting structure 22 and the second slider 12 can form a second injection channel 33. One end of the second injection channel 33 is connected to the first injection channel 32, and the other end forms a pouring port 331. At the same time, the third injection channel 34 on the base 1 can communicate with the second injection channel 33, and the second slider 12 is provided with a fourth injection channel 35 that communicates with the second injection channel 33.
[0058] At this time, the product cavity 31 is formed by the first slider 11 and the second slider 12 and the base 1, and is connected to the product cavity 31 by the first injection channel 32. The first injection channel 32, the second injection channel 33, the third injection channel 34 and the fourth injection channel 35 are interconnected, which can ensure that the injection material flows smoothly into the product cavity 31, providing a stable material supply for product molding. After the product is filled and molded, the first slider 11 is slid to cut off the connection between the product and the gate by the gate cutting structure 22 on it.
[0059] Secondly, the gate cutting structure 22 in the first slider 11 is detachably mounted on the slider body 21. This design makes it easy to replace the gate cutting structure 22 when it is worn. This prevents residue from being generated when separating the product from the injection molding material, thereby ensuring the appearance quality of the product and reducing the scrap rate of the product.
[0060] In the specific structure, combined with Figure 2 , Figure 8 and Figure 9 As shown, in this embodiment, the first slider 11 and the second slider 12 are centrally symmetrical to each other. That is, the second slider 12 also includes a slider body 21 and a gate cutting structure 22. At the same time, after the first slider 11 and the second slider 12 abut together, two product cavities 31 will be formed. The two product cavities 31 are arranged at intervals along the sliding direction perpendicular to the first slider 11.
[0061] Furthermore, to clearly illustrate the structure of this injection molding fixture, in this embodiment, the two product cavities 31 are referred to as the first product cavity 311 and the second product cavity 312, respectively. And as... Figure 1 and Figure 7 As shown in the figure, the base 1 in this embodiment includes a base body 16 and two support blocks 17 detachably disposed on the base body 16. Each support block 17 extends along the height direction of the base 1, and the first slider 11 and the second slider 12 abut together and can form a first product cavity 311 and a second product cavity 312 respectively with the two support blocks 17 on the base body 16.
[0062] Among them, such as Figure 3 As shown, in the front-rear direction of the base 1, the first product cavity 311 is located at the rear position, and the second product cavity 312 is located at the front position. In a specific implementation, the second slider 12 can be driven to slide, so that the gate cutting structure 22 on it can cut off the connection between the product in the second product cavity 312 and the injection molding material.
[0063] Furthermore, the gate cutting structure 22 on the first slider 11 is connected to the first product cavity 311 via the first injection runner 32 thereon. The gate cutting structure 22 on the second slider 12 also has a first injection runner 32, which is connected to the second product cavity 312. At the same time, the gate cutting structure 22 on the second slider 12 and the first slider 11 can also form a second injection runner 33. One end of the second injection runner 33 is connected to the first injection runner 32 near the second product cavity 312, and the other end can also form a pouring gate 331.
[0064] Furthermore, two third injection channels 34 are provided on the base 1, each corresponding to one of the two second injection channels 33. The third injection channel 34 near the second product cavity 312 is connected to the second injection channel 33 near the second product cavity 312. A fourth injection channel 35 is also provided on the first slider 11, which is connected to the second injection channel 33 near the second product cavity 312. For clarity, the following description will focus on the structures near the first product cavity 311.
[0065] It is worth mentioning that both the first slider 11 and the second slider 12 can slide under the drive of the hydraulic cylinder. Of course, in addition to driving the first slider 11 and the second slider 12 to slide by the hydraulic cylinder, a lever can also be used to drive the first slider 11 and the second slider 12. The connection relationship between the lever and the first slider 11 and the second slider 12 can be set with reference to the existing technology, and will not be described in detail here.
[0066] Secondly, in traditional injection molds, after the mold is opened, the molded plastic part is always connected to the solidified material at the gating channel and cannot be separated automatically. It is necessary to manually cut and separate the plastic part from the solidified material in order to produce a usable product. However, manual operation has low production efficiency and is also prone to making the gate cut surface of the plastic part uneven, affecting the appearance of the product.
[0067] Therefore, in order to meet the requirements of enterprises for production efficiency and product quality, and to ensure that products have excellent appearance quality while improving production efficiency, automated production of injection molding tooling has emerged. That is, before the product is ejected from the mold, the connection between the product and the gate is cut off by the sliding of the first slider 11 and the second slider 12, and by the gate cutting structure 22, thereby realizing the separation of the product from the gate.
[0068] In specific implementation, the first slider 11 slides and cuts off the connection between the product in the first product cavity 311 and the injection material through the gate cutting structure 22 on it. The injection material is the injection material in the first injection channel 32 near the first product cavity 311. The second slider 12 slides and cuts off the connection between the product in the second product cavity 312 and the injection material through the gate cutting structure 22 on it. The injection material is the injection material in the first injection channel 32 near the second product cavity 312.
[0069] Furthermore, each gate cutting structure 22 can be fixed to the corresponding slider body 21 by bolts 221. Of course, in addition to using screw connection, other common detachable connection methods can also be used.
[0070] Based on the above overview, in this embodiment, in order to reduce the flow resistance of the injection molded material, such as Figure 5 As shown, along the flow direction of the injection material in the first injection channel 32, the cross-sectional area of the first injection channel 32 gradually decreases.
[0071] Therefore, by gradually reducing the cross-sectional area of the first injection runner 32, the flow rate of the injection material can be increased, ensuring that the material is quickly filled into the product cavity 31, reducing the filling time, thereby improving production efficiency. At the same time, it can also overcome the flow resistance of the injection material, allowing it to pass smoothly through the first injection runner 32 and fill all corners of the product cavity 31, reducing molding defects such as short shots and material shortages caused by poor material flow, and improving the molding quality of the product.
[0072] It should be noted that the first injection channel 32 near the first product cavity 311 has the same structure as the first injection channel 32 near the second product cavity 312, that is, the cross-sectional area of each first injection channel 32 gradually decreases along the flow direction of the injection material.
[0073] Furthermore, in this embodiment, as a preferred exemplary structure, refer to... Figure 2 and Figure 4 As shown, the extension direction of the second injection channel 33 intersects the sliding direction of the first slider 11, and the sliding direction of the second slider 12 is opposite to the sliding direction of the first slider 11.
[0074] Here, the extension direction of the second injection runner 33 intersects with the sliding direction of the first slider 11. This forces the injection material entering the second injection runner 33 from the gating port 331 to change direction during flow, breaking the limitation of the injection material flowing in a single direction, reducing flow resistance, and thus preventing eddies or stagnation of the injection material, thereby improving mold filling efficiency and injection quality. Simultaneously, the second slider 12 slides in the opposite direction to the first slider 11, ensuring tight contact between the two during mold closing and preventing leakage of the injection material during the injection process.
[0075] In the specific structure, the first slider 11 and the second slider 12 slide along the width direction of the base 1, and the second injection channel 33 near the first product cavity 311 and the second injection channel 33 near the second product cavity 312 extend along the height direction of the base 1.
[0076] Furthermore, the two first injection channels 32 are connected by a connecting channel 36. In specific implementation, injection material can be poured into the two pouring ports 331 respectively, or injection material can be poured into one of the pouring ports 331. The injection material will fill each of the first injection channels 32, each of the second injection channels 33, each of the third injection channels 34, each of the fourth injection channels 35 and the connecting channel 36.
[0077] In addition, in other embodiments, it is possible to provide only one second injection channel 33 to pour injection material into the pouring port 331, or to provide two first injection channels 32 that are not connected to each other, so that injection material is poured into the two pouring ports 331 respectively.
[0078] Furthermore, to ensure the quality of the gate cutting, in this embodiment, such as Figure 3 , Figure 4 and Figure 5 As shown, the fourth injection runner 35 is arranged intersecting with the second injection runner 33. This arrangement allows the injection material in the fourth injection runner 35 to counteract the cutting force of the gate cut-off structure 22 when the gate cut-off structure 22 severs the connection between the product and the injection material in the first injection runner 32. This prevents the injection material in the first injection runner 32 from rotating, ensuring complete separation between the product and the gate, guaranteeing the product's appearance quality. Simultaneously, it prevents rotational stress generated during the shearing process from damaging the gate cut-off structure 22.
[0079] In the specific structure, each of the fourth injection molding channels 35 in this embodiment extends along the width direction of the base 1, and the fourth injection molding channel 35 near the first product cavity 311 is disposed on the second slider 12, and the fourth injection molding channel 35 near the second product cavity 312 is disposed on the first slider 11.
[0080] In specific implementation, when the gate cutting structure 22 on the first slider 11 cuts off the gate, the fourth injection channel 35 on the second slider 12 can counteract the cutting force of the gate cutting structure 22, preventing the injection material from rotating; when the gate cutting structure 22 on the second slider 12 cuts off the gate, the fourth injection channel 35 on the first slider 11 can counteract the cutting force of the gate cutting structure 22, preventing the injection material from rotating.
[0081] Meanwhile, in this embodiment, as a preferred implementation, such as Figure 5 As shown, the third injection runner 34 and the fourth injection runner 35 are arranged intersecting. This arrangement allows some of the injection material to enter the third injection runner 34 from the second injection runner 33, thus making the injection material in the third injection runner 34 a stable anchor point. Therefore, when the gate cutting structure 22 moves with the first slider 11, it can counteract the pulling force of the first slider 11 on the injection material, so that the stress during gate cutting is concentrated at the connection 37 between the first injection runner 32 and the product cavity 31, thereby ensuring a smooth fracture surface and improving the product qualification rate.
[0082] In the specific structure, each third injection runner 34 extends along the height direction of the base 1. After the cast injection material solidifies, it will adhere to the first slider 11 and the second slider 12. When the first slider 11 drives the gate cutting structure 22 on it to slide and cuts the gate, the first slider 11 will tend to drive the injection material to slide together. Similarly, when the second slider 12 drives the gate cutting structure 22 on it to slide and cuts the gate, the second slider 12 will also tend to drive the injection material to slide together.
[0083] At this time, the injection material solidified in each of the third injection channels 34 can ensure the stability of the injection material. The setting of the third injection channel 34 can not only offset the pulling force of the first slider 11 on the injection material, but also offset the pulling force of the second slider 12 on the injection material, preventing the first slider 11 and the second slider 12 from sliding together with the injection material. As a result, the stress at the gate cut is concentrated at the connection port 37 between the first product cavity 311 and the corresponding first injection channel 32 and the connection port 37 between the second product cavity 312 and the corresponding first injection channel 32, which helps to ensure a smooth fracture surface and improve the product qualification rate.
[0084] Furthermore, to facilitate the removal of the solidified injection molding material, in this embodiment, as follows: Figure 2 and Figure 4 As shown, the base 1 is provided with a first through hole 13 that communicates with the third injection channel 34. The length directions of the third injection channel 34 and the first through hole 13 are consistent. The first through hole 13 is provided with an ejector pin 131 that slides along the length direction of the first through hole 13.
[0085] The advantage of this design is that, by positioning the ejector pin 131 and allowing it to directly act on the injection material within the third injection runner 34, a uniform ejection force can be applied after the product separates from the injection material. This allows the solidified injection material to smoothly detach from the base 1, thus enabling rapid removal of solidified injection material, shortening the entire injection molding production cycle, and allowing the mold to proceed to the next injection cycle more quickly, thereby improving production efficiency. Simultaneously, the first through hole 13 is connected to the third injection runner 34, and the sliding of the ejector pin 131 also helps to remove any residual material and impurities within the first through hole 13, ensuring the unobstructed flow of the runner and through hole, and maintaining the normal operating performance of the mold.
[0086] In the specific structure, there are two first through holes 13 on the base 1, and the two first through holes 13 correspond one-to-one with the two third injection channels 34, and each first through hole 13 is provided with an ejector pin 131. In specific implementation, after the injection material separates from the two products, the injection material solidified in the two third injection channels 34 will fix the entire injection material on the base 1. At this time, by sliding the two ejector pins 131 upward, the entire injection material can be pushed and detached from the base 1.
[0087] In addition, in this embodiment, to ensure the stability of the gate cutting process, it is still referred to Figure 5 As shown, the extension length of the fourth injection runner 35 is more than twice the diameter of the connection port 37 between the first injection runner 32 and the product cavity 31. This arrangement ensures that, when the first slider 11 and the second slider 12 slide, a portion of the injection material remains within the fourth injection runner 35 to form a rigid support, thereby distributing the cutting force of the gate cutting structure 22 and ensuring the stability of the cutting process.
[0088] In the specific structure, the diameter of the first product cavity 311 and the corresponding first injection channel 32 connecting port 37 is the same as the diameter of the second product cavity 312 and the corresponding first injection channel 32 connecting port 37, and the extension length of each fourth injection channel 35 is also the same, which is twice the diameter of the connecting port 37. Of course, in addition to setting the extension length of the fourth injection channel 35 to twice the diameter of the connecting port 37, the extension length of the fourth injection channel 35 can also be designed and adjusted according to actual needs, such as three times, four times, etc., the diameter of the connecting port 37.
[0089] Furthermore, in this embodiment, as a preferred implementation, such as Figure 6 and Figure 7 As shown, the bottom of the first slider 11 is provided with a first groove 111, and the base 1 is provided with a first guide rail 14 adapted to the first groove 111. The first guide rail 14 is embedded in the first groove 111 and can guide the first slider 11 to slide relative to the base 1.
[0090] Meanwhile, the bottom of the second slider 12 is provided with a second groove 121, and the base 1 is provided with a second guide rail 15 adapted to the second groove 121. The second guide rail 15 is embedded in the second groove 121 and can guide the second slider 12 to slide relative to the base 1.
[0091] Here, the matching relationship between the first guide rail 14 and the first slide groove 111 can provide guidance for the sliding of the first slider 11 relative to the base 1, and the matching relationship between the second guide rail 15 and the second slide groove 121 can provide guidance for the sliding of the second slider 12 relative to the base 1, so that the first slider 11 and the second slider 12 can slide along specific paths respectively, so that the first slider 11 and the second slider 12 can accurately abut and form the product cavity 31.
[0092] Meanwhile, the guide rails and slides also prevent the first slider 11 and the second slider 12 from shifting or wobbling, improving the sliding stability of the first slider 11 and the second slider 12, thereby improving the quality of the injection molded product. In the specific structure, both the first slide 111 and the second slide 121 extend along the width direction of the base 1.
[0093] Specifically, in this embodiment, in order to reduce the wear of the first slider 11 and the second slider 12, such as Figure 10 and Figure 11 As shown, both the first guide rail 14 and the second guide rail 15 are provided with oil chambers 41 and multiple second through holes 42 communicating with the oil chambers 41. The multiple second through holes 42 are arranged at intervals along the length direction of the first guide rail 14 or the second guide rail 15. Furthermore, an oil driving assembly 43 is provided inside the oil chamber 41, which can drive the oil in the oil chamber 41 to flow out from the second through holes 42.
[0094] Here, the oil cavity 41 stores lubricating oil, and the oil drive assembly 43 allows multiple second through holes 42 on the first guide rail 14 to seep out onto the contact surface between the first guide rail 14 and the first slide groove 111, forming a lubricating film between them. This effectively reduces the friction between the first slider 11 and the first guide rail 14 during sliding, reducing heat and wear caused by friction, thereby extending the service life of the first guide rail 14 and the first slider 11. Simultaneously, the multiple second through holes 42 are spaced along the length of the guide rail to ensure that the lubricating oil evenly covers the entire sliding path, avoiding insufficient or excessive lubrication in certain areas.
[0095] In the specific structure, the first guide rail 14 and the second guide rail 15 have the same structure, and the number of second through holes 42 on both is the same, which facilitates design and manufacturing. Specifically, the structure of the first guide rail 14 can be referred to Figure 10 and Figure 11The structure of the second guide rail 15 is configured. Furthermore, the number of second through holes 42 on each guide rail can be set to four. Of course, the specific number of second through holes 42 can also be designed and adjusted according to actual needs, such as one, two, or three.
[0096] In specific implementation, by driving the oil driving assembly 43 in each oil chamber 41, the oil in the oil chamber 41 of the first guide rail 14 can flow out from each of the second through holes 42 of the first guide rail 14, and the oil in the oil chamber 41 of the second guide rail 15 can flow out from each of the second through holes 42 of the second guide rail 15. This can lubricate the contact surface between the first guide rail 14 and the first slide groove 111 and the contact surface between the second guide rail 15 and the second slide groove 121, thereby reducing the wear of the first slider 11 and the second slider 12 caused by friction.
[0097] Meanwhile, in this embodiment, as a preferred implementation, such as Figure 11 As shown, the oil drive assembly 43 includes a rotating shaft 431 rotatably disposed within the oil chamber 41, and a helical blade 432 disposed on the rotating shaft 431. It can be understood that the oil drive assembly 43 consists of a rotating shaft 431 and a helical blade 432, which has a simple structure and is easy to design and implement.
[0098] By driving the rotating shaft 431 to rotate, the spiral blade 432 rotates accordingly. The spiral propulsion principle of the spiral blade 432 can be used to continuously push the oil in the oil chamber 41 along the length of the first guide rail 14, forming a stable oil flow. This ensures that the oil can flow out of the second through hole 42 efficiently, providing stable lubrication between the first guide rail 14 and the first slider 11.
[0099] Furthermore, both the first guide rail 14 and the second guide rail 15 are equipped with drive motors 45, with each drive motor 45 corresponding to a rotating shaft 431, and the rotating shaft 431 connected to the output end of the corresponding drive motor 45. This connection between the rotating shaft 431 and the output end of the drive motor 45 allows for active control of the oil flow rate and volume, preventing oil leakage or contamination due to over-lubrication. Moreover, the first guide rail 14 and the second guide rail 15 are each equipped with an independent drive motor 45, allowing for individual adjustment of the oil output according to the actual movement requirements of the first slider 11 and the second slider 12.
[0100] In specific implementation, the drive motor 45 on the first guide rail 14 drives the rotating shaft 431 to rotate, and the spiral blades 432 on it rotate together with the rotating shaft 431, so as to transport the oil in the oil chamber 41 and let the oil flow out from each of the second through holes 42 on the first guide rail 14 to lubricate the first guide rail 14 and the first slide groove 111, thereby reducing the wear of the first slider 11.
[0101] Similarly, the drive motor 45 on the second guide rail 15 drives the rotating shaft 431 to rotate, and the spiral blades 432 on it rotate together with the rotating shaft 431, thereby conveying the oil in the oil chamber 41 and allowing the oil to flow out from each of the second through holes 42 on the second guide rail 15 to lubricate the second guide rail 15 and the second slide groove 121, thereby reducing the wear of the second slider 12.
[0102] In addition, in this embodiment, to avoid wasting oil, the following reference is continued. Figure 11 As shown, both the first guide rail 14 and the second guide rail 15 are provided with circulation channels 44. The circulation channels 44 and the oil chamber 41 extend along the length direction of the first guide rail 14 or the second guide rail 15, and the two ends of the circulation channels 44 are respectively connected to the oil chamber 41.
[0103] Therefore, by setting up the circulation channel 44, the oil in the oil chamber 41 can form a circulating flow. When the oil driving component 43 drives the oil to flow out from the second through holes 42 of the first guide rail 14 to lubricate the first guide rail 14 and the first slider 11, the excess oil will flow back into the oil chamber 41 and enter the circulation channel 44, realizing the recycling of oil. This avoids a large loss and waste of oil, reducing the operating cost of the injection molding tooling. At the same time, it can also reduce the maintenance workload caused by frequent oil addition.
[0104] In the specific structure, the circulation channel 44 and oil cavity 41 in the first guide rail 14 extend along the length direction of the first guide rail 14 (the width direction of the base 1), and the circulation channel 44 and oil cavity 41 in the second guide rail 15 extend along the length direction of the second guide rail 15 (the width direction of the base 1).
[0105] In specific implementation, when the first slider 11 and the second slider 12 slide, the drive motors 45 drive the rotating shafts 431 to rotate, and the spiral blades 432 transport the oil in the corresponding oil chambers 41, causing the oil to flow out from the corresponding second through holes 42 to lubricate the first slider 11 and the second slider 12. At this time, in addition to the oil flowing out from the second through holes 42, some oil will also flow into the circulation channel 44 under the transport of the spiral blades 432, and return to the oil chambers 41 through the circulation channel 44. Thus, the pressure of the oil flowing out from the second through holes 42 can be reduced, and a large amount of oil can be prevented from flowing out of the second through holes 42.
[0106] Furthermore, after lubricating the first slider 11 and the second slider 12, each drive motor 45 will stop driving the rotating shaft 431, and each spiral blade 432 will no longer transport oil. At this time, the oil will flow back to the oil chamber 41 and the circulation channel 44 through each second through hole 42, in preparation for subsequent transport by the spiral blade 432. This reduces the waste of oil.
[0107] In this embodiment, the injection molding fixture, when in use, slides the first slider 11 and the second slider 12, causing them to drive the corresponding gate cutting structure 22 to cut off the connection between the corresponding product and the gate, thereby achieving separation of each product from the gate. Furthermore, by detachably mounting each gate cutting structure 22 on its corresponding slider body 21, each gate cutting structure 22 can be replaced, preventing wear of the gate cutting structure 22 that could lead to incomplete separation of the product and gate, resulting in residue. This ensures the appearance quality of the product and reduces the scrap rate.
[0108] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. An injection molding tooling, characterized in that: It includes a base (1), and a first slider (11) and a second slider (12) slidably disposed on the base (1); The first slider (11) includes a slider body (21) and a detachable gate cutting structure (22) disposed on the slider body (21). The first slider (11) and the second slider (12) can slide and abut against the base (1) and form a product cavity (31) together with the base (1). The first injection channel (32) on the gate cutting structure (22) can communicate with the product cavity (31), and the second injection channel (33) can be formed between the gate cutting structure (22) and the second slider (12). One end of the second injection channel (33) is connected to the first injection channel (32), and the other end forms a pouring port (331). The third injection channel (34) on the base (1) can be connected to the second injection channel (33), and the second slider (12) is provided with a fourth injection channel (35) connected to the second injection channel (33).
2. The injection molding fixture according to claim 1, characterized in that: Along the flow direction of the injection material in the first injection channel (32), the cross-sectional area of the first injection channel (32) gradually decreases.
3. The injection molding fixture according to claim 1, characterized in that: The extension direction of the second injection channel (33) intersects the sliding direction of the first slider (11), and the sliding direction of the second slider (12) is opposite to the sliding direction of the first slider (11).
4. The injection molding fixture according to claim 3, characterized in that: The fourth injection channel (35) is arranged to intersect with the second injection channel (33); and / or, The third injection channel (34) and the fourth injection channel (35) are arranged to intersect.
5. The injection molding fixture according to claim 1, characterized in that: The base (1) is provided with a first through hole (13) that communicates with the third injection channel (34). The length direction of the third injection channel (34) and the first through hole (13) are the same. The first through hole (13) is provided with an ejector pin (131) that slides along the length direction of the first through hole (13).
6. The injection molding fixture according to claim 1, characterized in that: The extension length of the fourth injection channel (35) is more than twice the diameter of the connection port (36) between the first injection channel (32) and the product cavity (31).
7. The injection molding fixture according to claim 1, characterized in that: The bottom of the first slider (11) is provided with a first groove (111), and the base (1) is provided with a first guide rail (14) adapted to the first groove (111). The first guide rail (14) is embedded in the first groove (111) and can guide the first slider (11) to slide relative to the base (1); and / or, The bottom of the second slider (12) is provided with a second groove (121), and the base (1) is provided with a second guide rail (15) adapted to the second groove (121). The second guide rail (15) is embedded in the second groove (121) and can guide the second slider (12) to slide relative to the base (1).
8. The injection molding fixture according to claim 7, characterized in that: Both the first guide rail (14) and the second guide rail (15) are provided with oil chambers (41) and multiple second through holes (42) communicating with the oil chambers (41). The multiple second through holes (42) are arranged at intervals along the length direction of the first guide rail (14) or the second guide rail (15). The oil chamber (41) is provided with an oil driving assembly (43), which can drive the oil in the oil chamber (41) to flow out from the second through hole (42).
9. The injection molding fixture according to claim 8, characterized in that: The oil drive assembly (43) includes a rotating shaft (431) rotatably disposed in the oil chamber (41) and a spiral blade (432) disposed on the rotating shaft (431). Both the first guide rail (14) and the second guide rail (15) are equipped with drive motors (45), and the drive motors (45) and the rotating shafts (431) correspond one-to-one. The rotating shafts (431) are connected to the output ends of the corresponding drive motors (45).
10. The injection molding fixture according to claim 8, characterized in that: Both the first guide rail (14) and the second guide rail (15) are provided with circulation channels (44), and the circulation channels (44) and the oil chamber (41) extend along the length direction of the first guide rail (14) or the second guide rail (15). The two ends of the circulation channel (44) are respectively connected to the oil cavity (41).