Submarine gate insert and mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a submarine gate insert and a mold, the submarine gate insert is provided with a sub-runner, a glue inlet channel and a glue inlet groove, one end of the glue inlet channel is communicated with the sub-runner, and the other end of the glue inlet channel is communicated with the glue inlet groove; the included angle alpha between the interface of the glue inlet channel and the glue inlet groove and the glue inlet direction of the glue inlet channel is an acute angle, and the sectional area of the glue inlet groove is larger than that of the glue inlet channel. When a mold is assembled with the insert, a water gap on a product can be naturally broken when the product is demolded, and a flatter and higher-quality broken surface is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and more specifically, to a sub-gate insert and a mold. Background Art

[0002] Most PVC-U water supply fittings and pipe products use a large nozzle injection method. When designing the injection mold, it is common to connect the product and the nozzle material in series and output the parts simultaneously. In the later stage, manual and mechanical shearing and separation operations are required. This operation method has high labor costs and is prone to work-related accidents, which has a great impact on production.

[0003] The Chinese patent discloses a nozzle separation injection mold, including a movable mold fixing plate and a movable mold plate, and also includes an ejector fixing structure; a product ejector; a nozzle ejector; and a driving member. The nozzle separation injection mold of the invention uses a driving member to drive the nozzle ejector to move relative to the ejector fixing structure. When the product and the nozzle are demoulded, the product ejector first ejects the product, and the nozzle ejector keeps the nozzle immobile relative to the movable mold plate. At this time, the relative movement between the product and the nozzle separates the product from the nozzle, and then the ejector fixing structure continues to drive the product ejector and the nozzle ejector to move so that the product and the nozzle are both demoulded, overcoming the problems of low production efficiency and high cost caused by the need for manual separation of the product and the nozzle in the prior art, realizing automated production and improving production efficiency. However, this mold only causes the product and the nozzle to produce relative displacement and thus separation through different ejector pushing sequences. In the actual separation process, it may cause problems such as uneven fracture and product tearing, affecting product quality. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art and provide a submerged gate insert which can form a smoother and higher-quality fracture surface when separating a gate and a product.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A subgate insert is provided, which is provided with a runner, a glue feed channel and a glue feed groove, wherein one end of the glue feed channel is connected to the runner, and the other end is connected to the glue feed groove, and an angle α between an interface between the glue feed channel and the glue feed groove and a glue feed direction of the glue feed channel is formed at an acute angle, and a cross-sectional area of ​​the glue feed groove is larger than a cross-sectional area of ​​the glue feed channel.

[0007] When the submerged gate insert is working, the molten material for casting enters from the branch channel and finally enters the cavity from the glue inlet groove. With this arrangement, the branch channel can divert the cast molten material into the glue inlet channel, and the molten material enters the glue inlet groove through the glue inlet channel, and then enters the cavity from the glue inlet groove. The glue inlet channel and the glue inlet groove are arranged obliquely, and the angle α is an acute angle, forming a sharp structure at the connection between the glue inlet channel and the glue inlet groove. When the model in the cavity is removed, the sharp structure can break and separate the sprue material at the glue inlet channel and the glue inlet groove, thereby realizing automatic cutting of the sprue and ensuring a smooth cut; on the other hand, the cross-sectional area of ​​the glue inlet groove is larger than that of the glue inlet channel, which can effectively prevent the molten material from flowing poorly in the narrow flow channel, and can change the swirling flow direction of the molten material, thereby avoiding defects such as flow lines, pits, and pitting in the model in the cavity, thereby improving product quality.

[0008] Preferably, the diameter of the connection between the glue inlet channel and the branch channel is larger than the diameter of the connection with the glue inlet groove.

[0009] This arrangement can not only make the cross-sectional area of ​​the water inlet at the glue inlet channel and the glue inlet groove smaller, making it easier to separate, but also increase the pressure of the molten material when it enters the channel with a smaller cross-sectional area from the channel with a larger cross-sectional area, which is beneficial to improving the fluidity of the molten material and improving the injection molding quality.

[0010] Preferably, the glue inlet channel is a trapezoidal channel that is wide at the top and narrow at the bottom, and a chamfered structure is provided at the corners.

[0011] This setting method is conducive to maintaining a suitable area of ​​the glue inlet, with small molten material flow resistance, uniform and stable feed volume flow rate, sufficient pressure after the molten material enters the cavity, and the product has high density and good fullness.

[0012] Furthermore, the length of the lower bottom of the trapezoidal channel is 2-3 times the height of the trapezoidal channel.

[0013] The process diameter is set at the glue inlet. The submersible gate insert is subjected to force when it is pulled and cut in the vertical direction (height). The smaller the height dimension, the smaller the cutting force of the submersible insert, and the product convex fracture quality is better. On the contrary, the larger the height dimension, the greater the cutting force of the gate material, the cutting action becomes a pulling action, and pits will form on the plane of the gate boss, affecting the appearance of the product. This setting method can effectively improve the flatness of the cut surface.

[0014] Preferably, the glue inlet groove has a thickness of 0.1-0.5 mm.

[0015] With this setting, when the molten material enters the glue inlet groove, the molten material is buffered in the glue inlet groove, avoiding direct entry into the cavity from the narrow glue inlet channel, making the molten material injection path change more gradually, and avoiding the formation of defects such as flow lines, pits, and pitting caused by rapid pressure changes.

[0016] Preferably, a plurality of screw countersunk holes are also provided.

[0017] Through this arrangement, the subgate insert can be detachably connected to the movable mold or the fixed mold according to production needs, so as to improve the application scope of the utility model.

[0018] Preferably, the glue inlet channels and glue inlet grooves are grouped in pairs, and there are plural groups in total, and the two groups of glue inlet channels and glue inlet grooves are symmetrically arranged on both sides of the branch channel.

[0019] Through this arrangement, the subgate insert can simultaneously connect multiple cavities with the main runner, and multiple models can be cast at the same time, thereby improving production efficiency.

[0020] A submerged gate mold comprises a fixed mold and a movable mold, wherein a cavity and a main runner are formed in the middle of the fixed mold and the movable mold after being combined, and further comprises the above-mentioned submerged gate insert, wherein the submerged gate insert is detachably connected to the fixed mold or the movable mold, the branch channel is connected to the main runner, the glue inlet groove is connected to the cavity, and the main runner is connected to the cavity through the submerged gate insert.

[0021] Through this arrangement, the submerged gate insert can be installed in the fixed mold. When the movable mold is separated from the fixed mold, the submerged gate insert and the fixed mold remain stationary, the product in the cavity follows the movable mold to separate, and the submerged gate insert and the product undergo relative displacement. In this process, the sharp-angle structure between the glue inlet channel and the glue inlet groove disconnects the gate material, thereby separating the product and the gate material in the process of following the movement of the movable mold.

[0022] Preferably, the submerged gate insert is also provided with a plurality of ejector movable openings.

[0023] Furthermore, the subgate mold further comprises a plurality of ejector pins, which are movably connected to the movable mold, and some of the ejector pins can be inserted into the mold cavity, while the remaining ejector pins can be inserted into the subgate insert.

[0024] Through this arrangement, when the subgate insert is installed in the movable mold, after the fixed mold is separated from the movable mold, the ejector pins are respectively inserted into the cavity and the subgate insert to eject the product and the sprue material. In the process of leaving the mold, the product and the subgate insert are relatively displaced, and the connection between the product and the sprue material is disconnected by the sharp-angle structure of the subgate insert, thereby completing the separation of the mold and the sprue material during demolding and improving the convenience of material removal.

[0025] Preferably, the subgate insert is arranged in the middle of the fixed mold or the movable mold, and the main runner is connected with a plurality of cavities through the subgate insert.

[0026] With this setting, the molten material in the main runner can be injected into multiple cavities through the submerged gate insert, thereby forming multiple products at one time, and ensuring that the injection pressure and runner length of each product are the same, which is more conducive to the unified control of injection pressure and cooling, thereby improving injection efficiency and product quality.

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] (1) By setting the glue inlet groove, the cast product can be separated from the nozzle material autonomously during demoulding, and the molding quality during the casting process is guaranteed, avoiding the occurrence of defects such as flow lines, pits, and pits.

[0029] (2) The setting of the trapezoidal channel inlet with a wide top and narrow bottom ensures the flatness of the sprue material when it is cut and the fluidity of the molten material during the injection molding process, thereby improving the molding quality of the product.

[0030] (3) Through the design of the screw countersunk hole, the submerged gate insert can be quickly disassembled and replaced with the movable mold or the fixed mold, thereby improving the applicability of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of a sub-gate insert according to the utility model from a first perspective;

[0032] Figure 2 This is a second perspective schematic diagram of a sub-gate insert of the utility model;

[0033] Figure 3 It is a third perspective schematic diagram of a sub-gate insert of the utility model;

[0034] Figure 4 for Figure 3 A schematic cross-sectional structure diagram of ;

[0035] Figure 5 It is a partial cross-sectional schematic diagram of a sub-gate mold of the utility model;

[0036] Figure 6 It is a schematic diagram of a first embodiment of a submerged gate mold of the utility model;

[0037] Figure 7 It is a schematic diagram of a second embodiment of a submerged gate mold of the utility model.

[0038] The illustrations are as follows:

[0039] 1. Runner; 2. Glue inlet; 3. Glue inlet groove; 4. Screw countersunk hole; 5. Fixed mold; 6. Moving mold; 7. Main runner; 8. Cavity; 9. Ejector;

[0040] α is the angle between the interface between the glue inlet channel and the glue inlet groove and the glue inlet direction of the glue inlet channel. DETAILED DESCRIPTION

[0041] The utility model is further described below in conjunction with specific implementation methods. The drawings are only used for exemplary descriptions, and are only schematic diagrams, not actual pictures, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0042] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0043] Example 1

[0044] like Figures 1 to 4 The figure shows a first embodiment of a submerged gate insert of the utility model, which provides a submerged gate insert, provided with a branch channel 1, a glue inlet channel 2 and a glue inlet groove 3, one end of the glue inlet channel 2 is connected to the branch channel 1, and the other end is connected to the glue inlet groove 3, and the angle α between the interface between the glue inlet channel 2 and the glue inlet groove 3 and the glue inlet direction of the glue inlet channel 2 is set to be an acute angle, and the cross-sectional area of ​​the glue inlet groove 3 is larger than the cross-sectional area of ​​the glue inlet channel 2.

[0045] When the submerged gate insert is working, the molten material for casting enters from the branch channel 1, and finally enters the cavity 8 from the injection groove 3. Through this setting, the branch channel 1 can divert the cast molten material into the injection channel 2, and the molten material enters the injection groove 3 through the injection channel 2, and then enters the cavity 8 from the injection groove 3. The injection channel 2 and the injection groove 3 are inclined, and the interface between the two forms an acute angle structure. When the model in the cavity 8 is removed, the acute angle structure can break and separate the nozzle material at the injection channel 2 and the injection groove 3, thereby realizing automatic cutting of the nozzle and ensuring a smooth cut; on the other hand, the cross-sectional area of ​​the injection groove 3 is larger than that of the injection channel 2, which can effectively avoid the molten material from flowing poorly in the narrow flow channel, and can change the swirling flow direction of the molten material, thereby avoiding the defects of flow lines, pits, pits, etc. in the model in the cavity 8, and improving product quality.

[0046] As an embodiment of the present utility model, the cross-sectional area of ​​the connection between the glue inlet channel 2 and the branch channel 1 is larger than the cross-sectional area at the connection with the glue inlet groove 3 .

[0047] This arrangement can not only make the cross-sectional area of ​​the water inlet at the glue inlet channel 2 and the glue inlet groove 3 smaller, which is convenient for separation; but also the pressure of the molten material will increase when it enters the channel with a smaller cross-sectional area from the channel with a larger cross-sectional area, which is beneficial to improve the fluidity of the molten material and improve the injection molding quality.

[0048] As an embodiment of the present utility model, the glue inlet channel 2 is a trapezoidal channel which is wide at the top and narrow at the bottom, and a chamfered structure is provided at the corner.

[0049] This arrangement is conducive to maintaining a suitable area of ​​the glue inlet, with small resistance to melt flow, uniform and stable feed volume flow rate, sufficient pressure after the melt enters the cavity 8, and high density and good fullness of the product.

[0050] As an embodiment of the present invention, the length of the lower bottom of the trapezoidal channel is 2-3 times the height of the trapezoidal channel.

[0051] The process diameter is set at the glue inlet. The submersible gate insert is subjected to force when it is pulled and cut in the vertical direction (height). The smaller the height dimension, the smaller the cutting force of the submersible insert, and the product convex fracture quality is better. On the contrary, the larger the height dimension, the greater the cutting force of the gate material, the cutting action becomes a pulling action, and pits will form on the plane of the gate boss, affecting the appearance of the product. This setting method can effectively improve the flatness of the cut surface.

[0052] As an implementation mode of the present utility model, the thickness of the glue inlet groove 3 is 0.1-0.5 mm.

[0053] With this arrangement, when the molten material enters the glue inlet groove 3, the molten material is buffered in the glue inlet groove 3, avoiding direct entry into the cavity 8 from the narrow glue inlet channel 2, thereby improving the fluidity of the molten material and avoiding the formation of defects such as flow lines, pits, and pitting.

[0054] As an embodiment of the present utility model, a plurality of screw countersunk holes 4 are further provided.

[0055] Through this arrangement, the submerged gate insert can be detachably connected to the movable mold 6 or the fixed mold 5 according to production needs, so as to improve the application scope of the utility model.

[0056] As an embodiment of the present invention, the glue inlet channels 2 and the glue inlet grooves 3 are grouped in pairs, and there are plural groups in total, and the two groups of glue inlet channels 2 and glue inlet grooves 3 are symmetrically arranged on both sides of the branch channel 1.

[0057] Through this arrangement, the subgate insert can simultaneously connect multiple cavities 8 with the main runner 7, and multiple models can be cast at the same time, thereby improving production efficiency.

[0058] Example 2

[0059] like Figure 5 and Figure 6 The figure shows a first embodiment of a submerged gate mold of the utility model.

[0060] A submerged gate mold comprises a fixed mold 5 and a movable mold 6. After the fixed mold 5 and the movable mold 6 are combined, a cavity 8 and a main runner 7 are formed in the middle. The mold also comprises the submerged gate insert of embodiment 1. The submerged gate insert is detachably connected to the fixed mold 5, the branch channel 1 is connected to the main runner 7, and the glue inlet groove 3 is connected to the cavity 8.

[0061] Through this arrangement, the submerged gate insert can be installed in the fixed mold 5. When the movable mold 6 is separated from the fixed mold 5, the submerged gate insert and the fixed mold 5 remain stationary, and the product in the cavity 8 moves with the movable mold 6, and the submerged gate insert and the product are relatively displaced. In this case, the sharp angle structure between the glue inlet channel 2 and the glue inlet groove 3 disconnects the gate material, thereby separating the product and the gate material in the process of following the movement of the movable mold 6, thereby improving the convenience of material removal.

[0062] As an implementation method of this embodiment, the submerged gate insert is arranged in the middle of the fixed mold 5 or the movable mold 6, and the main runner 7 is connected with the multiple cavities 8 through the submerged gate insert.

[0063] Through this arrangement, the molten material in the main runner 7 can be injected into multiple cavities 8 through the submerged gate insert, thereby forming multiple products at one time, and ensuring that the injection pressure and runner length between each product are the same, which is more conducive to the unified control of the injection pressure and cooling, thereby improving the injection efficiency and improving the product quality.

[0064] Example 3

[0065] like Figure 7 This is a second embodiment of a submerged gate mold of the utility model. This embodiment is similar to the second embodiment, except that the submerged gate insert is arranged on the movable mold 6 .

[0066] A submerged gate mold comprises a fixed mold 5 and a movable mold 6. After the fixed mold 5 and the movable mold 6 are combined, a cavity 8 and a main runner 7 are formed in the middle. The mold also comprises the submerged gate insert of embodiment 1. The submerged gate insert is detachably connected to the movable mold 6. The branch channel 1 is connected to the main runner 7, and the glue inlet groove 3 is connected to the cavity 8.

[0067] Preferably, the subgate mold further includes a plurality of ejector pins 9, which are movably connected to the movable mold 6, and the ejector pins 9 can be inserted into the cavity 8 or the subgate insert.

[0068] Through this arrangement, when the fixed mold 5 is separated from the movable mold 6, the ejector pin 9 extends out of the cavity 8 and the submerged gate insert respectively to eject the product and the sprue material. In the process of leaving the mold, the connection between the product and the sprue material is naturally separated by the action of the submerged gate insert, thereby completing the separation of the mold and the sprue material during demoulding and improving the convenience of material removal.

[0069] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A submerged gate insert, characterized in that: A flow divider (1), a glue feed channel (2) and a glue feed groove (3) are provided, one end of the glue feed channel (2) is connected to the flow divider (1), and the other end is connected to the glue feed groove (3), and an angle α between an interface between the glue feed channel (2) and the glue feed groove (3) and a glue feed direction of the glue feed channel (2) is formed at an acute angle, and a cross-sectional area of ​​the glue feed groove (3) is larger than a cross-sectional area of ​​the glue feed channel (2).

2. A subgate insert according to claim 1, characterized in that: The diameter of the connection between the glue inlet channel (2) and the branch channel (1) is larger than the diameter of the connection with the glue inlet groove (3).

3. A submerged gate insert according to claim 2, characterized in that: The glue inlet channel (2) is a trapezoidal channel that is wide at the top and narrow at the bottom, and a chamfered structure is provided at the corners.

4. A submerged gate insert according to claim 3, characterized in that: The length of the lower base of the trapezoidal channel is 2.3-2.7 times the height of the trapezoidal channel.

5. A subgate insert according to claim 1, characterized in that: The thickness of the glue inlet groove (3) is 0.1-0.5 mm.

6. A subgate insert according to claim 1, characterized in that: A plurality of screw countersunk holes (4) are also provided.

7. A subgate insert according to any one of claims 1 to 6, characterized in that: The glue inlet channels (2) and the glue inlet grooves (3) are grouped in pairs, with two groups in total, and the two groups of glue inlet channels (2) and glue inlet grooves (3) are symmetrically arranged on both sides of the branch channel (1).

8. A submerged gate mold, comprising a fixed mold (5) and a movable mold (6), wherein the fixed mold (5) and the movable mold (6) are combined to form a cavity (8) and a main runner (7) in the middle, characterized in that: It also includes the subgate insert according to any one of claims 1 to 7, wherein the subgate insert is detachably connected to the fixed mold (5) or the movable mold (6), the branch channel (1) is connected to the main runner (7), and the glue inlet groove (3) is connected to the cavity (8).

9. A submerged gate mold according to claim 8, characterized in that: It also comprises a plurality of ejector pins (9), wherein the ejector pins (9) are movably connected to the movable mold (6), and some of the ejector pins (9) can be inserted into the mold cavity (8), and the remaining ejector pins (9) can be inserted into the submerged gate insert.

10. A subgate mold according to claim 9, characterized in that: The submerged gate insert is arranged in the middle of the fixed mold (5) or the movable mold (6), and the main runner (7) is connected with a plurality of mold cavities (8) through the submerged gate insert.

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