Insert type flow guide sleeve and injection mold
Through the design of the insert type flow guide sleeve, the problems of water vapor discharge and runner blind spots in the injection mold are solved, and the surface quality of the injection molded products and the stability of the hot runner are improved.
Patent Information
- Application Number
- CN202422330062.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-24
AI Technical Summary
The water vapor caused by incomplete drying of materials in existing injection molds cannot be discharged, resulting in bubbles, silver marks, yellowing and dark spots on the surface of the product, and blind corners and sharp angles in the flow channel of the diverter plate affect product quality.
Design an insert-type flow guide sleeve, set up a valve pinhole, a waste storage tank and a rounded runner structure, which is used to discharge temporary waste and water vapor, avoid the formation of blind corners and sharp corners, and ensure a smooth transition of the runner.
Effectively discharge water vapor and slag, avoid product surface defects, improve product quality, and maintain the integrity and thermal stability of the runner, reducing processing complexity.
Smart Images
Figure CN223115744U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hot runner, in particular to an insert type flow guide sleeve and an injection mold. Background Technique
[0002] Injection molds are widely used in the production of plastic molds. During injection molding, the smoothness of the flow of the molten fluid in the hot runner affects the flow rate of the molten fluid, thereby affecting the injection molding efficiency. The manifold, also known as the hot runner manifold, is the central component of the injection mold. It distributes the plastic melt transmitted by the main runner nozzle to each injection point nozzle through the runner. The manifold can evenly fill the cavities of the mold, balance the flow of the plastic, and balance the heat of the system.
[0003] The flow guide sleeve is assembled on the hot runner manifold and is used for runner transfer and guiding the valve pin inside the manifold. During the injection process, when the material is not thoroughly and unevenly dried and has too high a moisture content, water vapor will be generated during heating. During injection molding, the water vapor, air, etc. carried by the material cannot be discharged from the flow guide sleeve, resulting in problems such as bubbles, silver streaks on the product surface, and yellowing and dark spots will appear due to the inability to discharge the slag generated during long-term injection molding, affecting the product quality.
[0004] In addition, in the prior art, the runner of the manifold is processed by drilling technology. According to the different products, the number and arrangement of the near-point positions of the products are different, and the runner directions are various. In order to balance the glue output, a beneficial angle will be processed at the runner connection position, and there are dead corners at the runner transfer and splicing positions. The beneficial angle and dead corners affect the molding of the product, the stress strength of the product, and the appearance of the product.
[0005] Therefore, there is an urgent need for an insert type flow guide sleeve and an injection mold to solve the above problems. Content of the Utility Model
[0006] The purpose of the utility model is to provide an insert type flow guide sleeve and an injection mold, which can discharge water vapor and store and discharge slag, avoid problems such as bubbles, silver streaks, yellowing, and dark spots on the product surface, so as to improve the surface quality of the injection product; at the same time, it can avoid dead corners and beneficial angles in the runner of the manifold from affecting the product quality.
[0007] To achieve the above purpose, the following technical solutions are provided:
[0008] An insert type flow guide sleeve is provided with a valve pin hole, a valve pin is installed in the valve pin hole and is movably matched with the insert type flow guide sleeve. The insert type flow guide sleeve is also provided with a waste storage groove, and the waste storage groove is communicated with the valve pin hole;
[0009] The insert type flow guide sleeve is also provided with a first runner and a second runner communicated with the first runner, and the connection between the first runner and the second runner is rounded.
[0010] As an alternative, the number of the waste storage grooves is multiple, and the multiple waste storage grooves are arranged at intervals along the axial direction of the insert type flow guiding sleeve.
[0011] As an alternative, the dimension of the waste storage groove in the direction perpendicular to the axis of the insert type flow guiding sleeve is D, and the value of D is greater than or equal to 0.3 mm and less than or equal to 0.8 mm.
[0012] As an alternative, the dimension of the waste storage groove along the axial direction of the insert type flow guiding sleeve is W, and the value of W is greater than or equal to 0.8 mm and less than or equal to 1.5 mm.
[0013] As an alternative, the inner walls of the valve needle hole, the first flow channel and the second flow channel are all treated with a chromium nitride coating.
[0014] As an alternative, the insert type flow guiding sleeve includes:
[0015] A connecting portion for detachably connecting with the cushion block.
[0016] As an alternative, the insert type flow guiding sleeve further includes:
[0017] A limiting portion connected to the connecting portion, and the limiting portion abuts against the cushion block.
[0018] As an alternative, the insert type flow guiding sleeve is provided with an anti-fooling structure.
[0019] As an alternative, the anti-fooling structure includes:
[0020] An anti-fooling edge for cooperating with the manifold plate.
[0021] An injection mold includes a cushion block and the above-mentioned insert type flow guiding sleeve, and the insert type flow guiding sleeve is connected to the cushion block.
[0022] Compared with the prior art, the beneficial effects of the present utility model are:
[0023] The insert-type flow guide sleeve provided by the present utility model solves the problems in the prior art that when the material is not thoroughly and unevenly dried and has a too high moisture content, water vapor generated during heating cannot be discharged during injection molding, resulting in bubbles, silver streaks, yellowing, and dark spots on the product surface. This is achieved by arranging a waste storage tank in the insert-type flow guide sleeve that communicates with the valve needle hole. The waste storage tank temporarily stores waste and slag, and at the same time, the water vapor generated when the material is heated can also be discharged through this waste storage tank. By arranging a first flow channel and a second flow channel on the insert-type flow guide sleeve and chamfering the transition between the first flow channel and the second flow channel, the smooth transition between the transition splitter plate and the main flow channel is realized, so that there are no dead corners at the flow channel corners, which can avoid the appearance of dead corners and sharp corners in the flow channel of the splitter plate from affecting the product quality, and is convenient for processing. There is no need to drill through holes and inserts on the splitter plate, ensuring the integrity and strength of the splitter plate. At the same time, the thermal stability of the hot runner is better.
[0024] The injection mold provided by the present utility model can discharge water vapor and store and discharge slag by applying the above insert-type flow guide sleeve, avoiding problems such as silver streaks, yellowing, and dark spots on the product surface, so as to improve the surface quality of the injection product. At the same time, it can avoid the appearance of dead corners and sharp corners in the flow channel of the splitter plate from affecting the product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present utility model and these drawings.
[0026] Figure 1 It is a schematic structural diagram of the insert-type flow guide sleeve provided by the embodiment of the present utility model.
[0027] REFERENCE MARKS
[0028] 100. Insert-type flow guide sleeve;
[0029] 10. Connection part;
[0030] 20. Limiting part;
[0031] 30. Valve needle hole;
[0032] 40. Waste storage tank;
[0033] 50. Anti-rotation part; 51. Anti-fooling chamfer;
[0034] 60. Flow channel part; 61. First flow channel; 62. Second flow channel; 63. Fillet;
[0035] 200, valve needle; 300, spacer block. Detailed implementation manners
[0036] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0037] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.
[0038] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0039] In the present application, unless otherwise clearly defined and limited, if there are terms such as "installation", "connection", "connection", "fixation", etc., these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0040] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or the like, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.
[0041] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.
[0042] During the injection molding process, when the material is not thoroughly and unevenly dried and the moisture content is too high, heating will generate water vapor. During injection molding, the water vapor, air, etc. carried by the material cannot be discharged from the insert type flow guiding sleeve, resulting in problems such as bubbles and silver streaks on the product surface. The slag generated during long-term injection molding cannot be discharged, resulting in problems such as yellowing and dark spots, which affect the product quality.
[0043] In addition, in the prior art, the flow channels of the flow distribution plate are processed by drilling technology. According to the different products, the number and arrangement of the near-point positions of the products are different, and the flow channel directions are various. In order to achieve balanced glue discharge, a beneficial angle will be processed at the connection position of the flow channels, and there are dead corners at the flow channel transfer and splicing positions. The beneficial angle and dead corners have an impact on the molding of the product, the stress strength of the product, and the appearance of the product.
[0044] To solve the above problems, as Figure 1 shown, this embodiment provides an insert type flow guiding sleeve 100. The insert type flow guiding sleeve 100 is provided with a valve needle hole 30. The valve needle 200 is installed in the insert type flow guiding sleeve 100 and is movably matched with the insert type flow guiding sleeve 100. The insert type flow guiding sleeve 100 is also provided with a waste storage groove 40, and the waste storage groove 40 is communicated with the valve needle hole 30; the insert type flow guiding sleeve 100 is also provided with a first flow channel 61 and a second flow channel 62 communicated with the first flow channel 61, and a fillet 63 is provided at the transfer position of the first flow channel 61 and the second flow channel 62.
[0045] By providing a waste storage groove 40 communicating with the valve needle hole 30 within the insert type flow guiding sleeve 100, the waste and slag are temporarily stored in the waste storage groove 40. At the same time, the water vapor generated when the material is heated can also be discharged through the waste storage groove 40, solving the problems in the prior art that the material drying is incomplete and uneven, and when the moisture content is too high, water vapor is generated due to heating. During injection molding, the air carried by the material cannot be discharged, resulting in bubbles, silver streaks, yellowing, and dark spots on the product surface; by providing a first flow channel 61 and a second flow channel 62 on the insert type flow guiding sleeve 100, and rounding the corner 63 at the connection of the first flow channel 61 and the second flow channel 62, the smooth transition between the transfer splitter plate and the main flow channel is achieved, making there be no dead corners at the flow channel corners, which can avoid the appearance of dead corners and sharp corners in the flow channels of the splitter plate and affect the product quality, and is convenient for processing. There is no need to drill through holes and inserts on the splitter plate, ensuring the integrity and strength of the splitter plate. At the same time, the thermal stability of the hot runner is also better.
[0046] Optionally, the number of waste storage grooves 40 is multiple, and the multiple waste storage grooves 40 are arranged at intervals along the axial direction of the insert type flow guiding sleeve 100, improving the ability to discharge water vapor and store waste, thereby reducing the maintenance frequency of the insert type flow guiding sleeve 100 and being beneficial to improving production efficiency.
[0047] Optionally, the dimension of the waste storage groove 40 in the direction perpendicular to the axis of the insert type flow guiding sleeve 100 is D, and the value of D is greater than or equal to 0.3 mm and less than or equal to 0.8 mm. Preferably, the value of D is 0.5 mm. In other embodiments, the value of the dimension D of the waste storage groove 40 in the direction perpendicular to the axis of the insert type flow guiding sleeve 100 can also be 0.3 mm, 0.4 mm, 0.6 mm, 0.7 mm, or 0.8 mm.
[0048] Optionally, the dimension of the waste storage groove 40 in the axial direction of the insert type flow guiding sleeve 100 is W, and the value of W is greater than or equal to 0.8 mm and less than or equal to 1.5 mm. Preferably, the value of W is 1 mm. In other embodiments, the value of the dimension W of the waste storage groove 40 in the axial direction of the insert type flow guiding sleeve 100 can also be 0.8 mm, 0.9 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, or 1.5 mm.
[0049] Optionally, the inner walls of the valve needle hole 30, the first flow channel 61, and the second flow channel 62 are all treated with a chromium nitride coating. Utilizing the characteristics of chromium, such as corrosion resistance and stability in humid air, is beneficial to the flow of the plastic at the corners of the insert type flow guiding sleeve 100 and reduces the wear of the valve needle 200 on the inner wall of the insert type flow guiding sleeve 100.
[0050] Optionally, the insert type flow guide sleeve 100 includes a connecting portion 10 for detachably connecting with the spacer block 300, which facilitates the quick disassembly and assembly of the connecting portion 10 and the spacer block 300, and improves the installation efficiency of the insert type flow guide sleeve 100 and the spacer block 300.
[0051] Specifically, an external thread is provided on the outer periphery of the connecting portion 10, and an internal thread is provided inside the spacer block 300. The connecting portion 10 is threadedly connected with the spacer block 300, eliminating the need to machine fixing threads on the manifold plate, simplifying the machining of the manifold plate, saving fixing screws, and reducing the manufacturing, processing, and assembly costs. At the same time, this insert type flow guide sleeve 100 prevents the spacer block 300 from contacting the heated manifold plate, reducing heat conduction, minimizing heat loss in the hot runner, and ensuring good thermal stability.
[0052] Optionally, the insert type flow guide sleeve 100 further includes a limiting portion 20 connected to the connecting portion 10. The limiting portion 20 abuts against the spacer block 300 and is used to limit the insert type flow guide sleeve 100.
[0053] It should be noted that the spacer block 300 is screwed onto the insert type flow guide sleeve 100 so that the spacer block 300 abuts between the template and the manifold plate, preventing loosening and glue leakage of the insert type flow guide sleeve 100.
[0054] Optionally, the insert type flow guide sleeve 100 is provided with an anti-fooling structure for cooperating to install the insert type flow guide sleeve 100 in the runner, facilitating the splicing of the runner and preventing misinstallation.
[0055] Specifically, the insert type flow guide sleeve 100 includes a rotation stopping portion 50. The rotation stopping portion 50 is provided on the side of the limiting portion 20 away from the connecting portion 10. The anti-fooling structure includes an anti-fooling chamfer 51 provided on the rotation stopping portion 50. The anti-fooling chamfer 51 is used to cooperate with the manifold plate to facilitate the splicing of the insert type flow guide sleeve 100 and the manifold plate.
[0056] Optionally, the insert type flow guide sleeve 100 further includes a runner portion 60. The runner portion 60 is provided on the side of the rotation stopping portion 50 away from the limiting portion 20. Both the first runner 61 and the second runner 62 are provided inside the runner portion 60.
[0057] This embodiment also provides an injection mold, which includes a template, a manifold plate, a spacer block 300, and the above-mentioned insert type flow guide sleeve 100. The insert type flow guide sleeve 100 is connected to the spacer block 300, and the spacer block 300 abuts between the template and the manifold plate, capable of discharging water vapor and storing discharged slag, avoiding problems such as silver streaks, yellowing, and dark spots on the product surface, and improving the surface quality of the injection product. At the same time, it can prevent dead ends and sharp corners from appearing in the runner of the manifold plate, which may affect the product quality.
[0058] Note that in the description of this specification, the description referring to the reference terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0059] The above is only the preferred embodiment of the present utility model and the technical principles applied. Those skilled in the art will understand that the present utility model is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present utility model. Therefore, although the present utility model has been described in more detail through the above embodiments, the present utility model is not limited to the above embodiments. Without departing from the concept of the present utility model, more other equivalent embodiments can be included, and the scope of the present utility model is determined by the scope of the appended claims.
Claims
1. Insert type flow guiding sleeve, characterized in that, The insert-type flow guide sleeve is provided with a valve needle hole (30), and a valve needle (200) is installed in the valve needle hole (30) and is movably matched with the insert-type flow guide sleeve. The insert-type flow guide sleeve is further provided with a waste storage groove (40), and the waste storage groove (40) is communicated with the valve needle hole (30). The insert-type flow guide sleeve is further provided with a first flow channel (61) and a second flow channel (62) communicated with the first flow channel (61). A fillet (63) is provided at the transition between the first flow channel (61) and the second flow channel (62).
2. The insert type flow guiding sleeve according to claim 1, characterized in that The number of the waste storage grooves (40) is multiple, and the multiple waste storage grooves (40) are arranged at intervals along the axial direction of the insert-type flow guide sleeve.
3. The insert type flow guide sleeve according to claim 1, characterized in that, The dimension of the waste storage groove (40) in the direction perpendicular to the axis of the insert-type flow guide sleeve is D, and the value of D is greater than or equal to 0.3 mm and less than or equal to 0.8 mm.
4. The insert type flow guide sleeve according to claim 1, characterized in that, The dimension of the waste storage groove (40) in the axial direction of the insert-type flow guide sleeve is W, and the value of W is greater than or equal to 0.8 mm and less than or equal to 1.5 mm.
5. The insert type flow guiding sleeve according to claim 1, wherein The inner walls of the valve needle hole (30), the first flow channel (61) and the second flow channel (62) are all treated with a chromium nitride coating.
6. The insert type flow guiding sleeve according to any one of claims 1-5, characterized in that The insert-type flow guide sleeve includes: A connecting portion (10) for detachably connecting with a spacer block (300).
7. The insert type flow guiding sleeve according to claim 6, wherein The insert-type flow guide sleeve further includes: A limiting portion (20) connected to the connecting portion (10), and the limiting portion (20) abuts against the spacer block (300).
8. The insert type flow guiding sleeve according to any one of claims 1-5, characterized in that, The insert-type flow guide sleeve is provided with an anti-fooling structure.
9. The insert type flow guiding sleeve according to claim 8, wherein, The anti-fooling structure includes: An anti-fooling chamfer (51) for cooperating with a manifold plate.
10. Injection mold, characterized in that, It includes a spacer block (300) and the insert-type flow guide sleeve according to any one of claims 1-9, and the insert-type flow guide sleeve is connected to the spacer block (300).