Injection mold

Abstract

The injection mold comprises a forming assembly and a sprue, the forming assembly comprises a first mold core and a second mold core, a cavity is defined when the first mold core and the second mold core are closed, and a through hole penetrating through the thickness direction of the second mold core is formed in the second mold core; the sprue is provided with a feeding channel and a side sprue which is communicated with the feeding channel and penetrates through the sprue, the side sprue is located on the side face of the sprue, and the sprue is slidably arranged in the through hole in the thickness direction of the second mold core so as to be switched between a first position and a second position; at the first position, the side gate of the sprue is communicated with the cavity, and a sizing material can enter the cavity from the feeding channel; in the demolding process, the sprue can move from the first position to the second position, and redundant rubber formed in the side sprue can be cut off by the second mold core.

Description

Technical Field

[0001] The present invention relates to the field of injection molding, and in particular to an injection mold. Background Art

[0002] Injection molding is a process widely used in the manufacture of plastic products. Its main process is to inject molten plastic into a mold and form a product of the desired shape after cooling and solidification. However, existing injection molds often leave gates on the product after injection molding. This is because the plastic melt needs to flow through the gate when entering the mold cavity, thus forming gate marks on the product.

[0003] In traditional processes, gate removal usually relies on manual operation, that is, after the injection molded part cools down, the operator uses tools to cut or grind the gate to achieve the purpose of removing the gate. This manual gate removal method is not only inefficient and consumes a lot of manpower, but also due to the uncertainty of manual operation, the quality of gate removal is difficult to guarantee, which can easily cause appearance defects of the product and even affect the structural strength of the product. In addition, the process of manual gate removal also has certain safety risks, such as the cutting tool may cause harm to the operator. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide an injection mold that can solve the problems of low product processing efficiency, low surface flatness and poor finish.

[0005] The utility model provides an injection mold, which comprises:

[0006] A molding assembly includes a first mold core and a second mold core, wherein the first mold core and the second mold core define a mold cavity when molded together, and the second mold core is provided with a through hole penetrating the second mold core in a thickness direction thereof; and

[0007] A nozzle having a feed channel and a side gate connected to the feed channel and passing through the nozzle, wherein the side gate is located on a side of the nozzle, and the nozzle is slidably arranged in the through hole along the thickness direction of the second mold core to switch between a first position and a second position;

[0008] In the first position, the side gate of the nozzle is connected to the cavity, and the rubber can enter the cavity from the feed channel; during the demolding process, the nozzle can move from the first position to the second position, and the excess rubber after molding in the side gate can be cut off by the second mold core.

[0009] In some embodiments, the lower end surface of the nozzle is open to form a second material guide trough connected to the side gate.

[0010] In some embodiments, the side gate extends obliquely upward from the second guide trough.

[0011] In some embodiments, the side gate has a side gate inlet and a side gate outlet, the side gate inlet is connected to the second material guide groove, and the flow channel cross-sectional area of ​​the side gate inlet is larger than the flow channel cross-sectional area of ​​the side gate outlet.

[0012] In some embodiments, the side gate has a flat cross-section.

[0013] In some embodiments, the side gate is connected to the side of the top of the cavity; and / or

[0014] The cavity is U-shaped; and / or

[0015] The side gate is in a conical trumpet shape.

[0016] In some embodiments, the molding assembly further includes a panel, the panel is attached to the second mold core, and the upper end of the nozzle is connected to the panel.

[0017] In some embodiments, the panel is provided with a stepped hole penetrating through the thickness thereof, the stepped hole being connected to and facing the through hole;

[0018] The nozzle is provided with a mounting step, and the upper end of the nozzle is limited in the step hole by the mounting step.

[0019] In some embodiments, the second mold core is provided with a plurality of through holes penetrating the second mold core in the thickness direction thereof;

[0020] The injection mold comprises a plurality of nozzles, and each nozzle is slidably arranged in each through hole in a one-to-one correspondence.

[0021] In some embodiments, when the molding assembly is molded, a plurality of independent cavities are defined, and a plurality of side gates are opened on the nozzle, each of which is connected to the feed channel respectively, and each of the side gates is connected to each of the cavities one by one.

[0022] The implementation of this application has the following beneficial effects:

[0023] The present application relates to an injection mold. After the injection molding is completed and before the mold is opened, the gate on the injection molded part can be cut and removed by sliding the nozzle away from a first position. This not only avoids the tedious manual removal of the gate, effectively improves the processing and production efficiency of the product, effectively saves manpower, but also avoids the operational risks of manually using a gate cutting tool; it also improves the processing consistency of the injection molded parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0025] Figure 1 is a schematic diagram of the structure of the injection mold in some embodiments of the present application;

[0026] Figure 2 From another perspective Figure 1 The structural schematic diagram of the injection mold shown;

[0027] Figure 3 is an exploded view of an injection mold and an injection molded part in some embodiments of the present application;

[0028] Figure 4 From another perspective Figure 3 Exploded view of the injection mold and the injection molded part shown;

[0029] Figure 5 yes Figure 3 A cross-sectional view of the injection mold and the injection molded part shown;

[0030] Figure 6 yes Figure 5 A magnified view at point A;

[0031] Figure 7 is a cross-sectional view of an injection mold and an injection molded part in some embodiments of the present application;

[0032] Figure 8 yes Figure 7 Enlarged view at B;

[0033] Fig. 9 It is a schematic diagram of the structure of the nozzle and the injection molded part without removing the internal injection plastic material;

[0034] Fig.10 It is a cross-sectional view of the nozzle and the injection molded part after the internal injection molding rubber material is removed;

[0035] Fig.11 A cross-sectional view of an injection mold in some embodiments of the present application;

[0036] Fig.12 is a schematic diagram of the structure of the nozzle in some embodiments of the present application;

[0037] The reference numerals are as follows:

[0038] 10-injection mold; 1-molding component; 11-cavity; 111-first molding surface; 112-second molding surface; 12-first mold core; 121-molding ridge; 1211-molding groove; 1212-avoidance groove; 1213-first material guide groove; 1214-feeding notch; 122-limiting groove; 13-second mold core; 131-alignment groove; 132-limiting protrusion; 133-through hole; 14-panel; 141-step hole;

[0039] 2- nozzle; 21- nozzle; 211- feed channel; 212- side gate; 2121- side gate inlet; 2122- side gate outlet; 213- second guide trough; 214- installation step;

[0040] 3- material guide channel;

[0041] 40-injection molded part; 41-first smooth surface; 42-second smooth surface; 43-side surface; 44-gate position;

[0042] P1 - First position. DETAILED DESCRIPTION

[0043] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0044] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0045] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] Figure 1 and Figure 2 The injection mold 10 in some embodiments of the present application is shown. The injection mold 10 is used for injection molding. During use, the rubber material is injected into the injection mold 10, and after the rubber material is cooled and formed, it is formed into an injection molded part 40.

[0048] like Figures 1 to 4 As shown, the injection mold 10 includes a molding component 1 and a nozzle 21, and the nozzle 21 is slidably disposed on the molding component 1. The molding component 1 is used to confine the rubber material in a predetermined cavity to form an injection molded part 40 of a predetermined shape. The nozzle 21 is used to guide the rubber material to flow into a predetermined position in the molding component 1.

[0049] like Figures 4 to 8 As shown, the molding assembly 1 includes a first mold core 12 and a second mold core 13. When the first mold core 12 and the second mold core 13 are molded together, a mold cavity 11 is defined. The second mold core 13 is provided with a through hole 133 that runs through the second mold core 13 in its thickness direction.

[0050] It can be understood that the first mold core 12 and the second mold core 13 can define the mold cavity 11 after the mold is closed, and the first mold core 12 and the second mold core 13 can expose the injection molded part 40 in the mold cavity 11 after the mold is opened. The through hole 133 on the second mold core 13 can be vertically penetrated, obliquely penetrated, etc.

[0051] like Figures 3 to 5 As shown, the nozzle 21 has a feed channel 211, a side gate 212 connected to the feed channel 211 and passing through the nozzle 21, the side gate 212 is located on the side of the nozzle 21, and the nozzle 21 is slidably arranged in the through hole 133 along the thickness direction of the second mold core 13 to switch between the first position P1 and the second position.

[0052] In the first position P1, the side gate 212 of the nozzle 21 is connected to the cavity 11, and the rubber can enter the cavity 11 from the feed channel 211; during the demolding process, the nozzle 21 can move from the first position P1 to the second position, and the excess rubber after molding in the side gate 212 can be cut off by the second core 13.

[0053] It can be understood that the nozzle 21 is provided with a feed channel 211 and a side gate 212. The nozzle 21 can slide in the thickness direction of the second mold core 13. The nozzle 21 has the ability to adjust its position relative to the molding component 1. The feed channel 211 defines a conveying path for the rubber material, so that the rubber material of the injection molding equipment can be conveyed to the side gate 212 through the feed channel 211, and the side gate 212 is used to guide the rubber material to be injected into the cavity 11.

[0054] Please also refer to Fig. 9 and Fig.10 If injection molding is required, the first mold core 12 and the second mold core 13 are molded together, and the nozzle 21 is slid to a preset first position P1. At the first position P1, the rubber material is injected into the cavity 11 through the feed channel 211 and the side gate 212 on the nozzle 21.

[0055] Before opening the mold, the nozzle 21 moves before the molding component 1, and the nozzle 21 moves from the first position P1 to the second position. During the movement, since the molding component 1 has not yet opened the mold, the injection molded part 40 will still be fixed between the first mold core 12 and the second mold core 13, so that the side gate 212 on the nozzle 21 will be misaligned with the cavity 11 to a certain extent. During the misalignment process, the purpose of cutting off the gate on the injection molded part is achieved, that is, the excess rubber material after molding in the side gate 212 is cut off.

[0056] It should also be noted that although the specific position of the second position is not shown in the figure, the second position does not overlap with the first position. When the nozzle 21 moves to the second position, the nozzle 21 will be misaligned with the cavity 11, and the gate on the injection molded part 40 can be removed once it is misaligned.

[0057] like Figure 3 , Figure 5 and Figure 6 As shown, in some embodiments of the injection mold 10 , the lower end surface of the nozzle 21 is open to form a second material guide groove 213 connected to the side gate 212 .

[0058] It can be understood that the second material guide groove 213 is a buffer space for the rubber material. Specifically, when the rubber material is injected through the feed channel 211, it will enter the second material guide groove 213, and the rubber material will flow along the groove wall of the second material guide groove 213 to be buffered. Subsequently, the rubber material will flow from the second material guide groove 213 to the side gate 212, and further be discharged into the cavity 11 through the side gate 212. In this way, because the rubber material can be buffered in the second material guide groove 213, the rubber material can be continuously discharged through the side gate 212, forming a continuous flow of the rubber material, thereby avoiding the formation of cavities on the injection molded part 40.

[0059] It should be noted that since the second material guide groove 213 is formed by opening the lower end surface of the nozzle 21, the rubber formed in the second material guide groove 213 will be exposed to the lower end surface of the nozzle 21 after cooling, so as to prevent excess rubber in the second material guide groove 213 from being stuck in the groove and facilitate removal.

[0060] like Fig.10 As shown, in some embodiments of the injection mold 10 , the side gate 212 extends obliquely upward from the second guide groove 213 .

[0061] It can be understood that in the actual injection molding process, the rubber material will be pre-filled in the second material guide groove 213 located on the lower end surface of the nozzle 21, and the filled rubber material will be squeezed upward from the second material guide groove 213 located below to flow into the side gate 212 located above, and then flow from bottom to top along the side gate 212, and further injected into the cavity 11 through the side gate 212. In this way, since the side gate 212 is tilted upward, the rubber material will gradually fill the side gate 212 under the action of gravity during the process of flowing along the side gate 212, avoiding gas accumulation in the side gate 212 to form bubbles, ensuring the continuity of the rubber material injection in the subsequent injection molding process, further avoiding the formation of bubbles on the injection molded part 40, and improving the injection molding quality of the product.

[0062] like Fig.10 As shown, in some embodiments of the injection mold 10 , the side gate 212 has a side gate inlet 2121 and a side gate outlet 2122 , the side gate inlet 2121 is connected to the second material guide groove 213 , and the flow channel cross-sectional area of ​​the side gate inlet 2121 is greater than the flow channel cross-sectional area of ​​the side gate outlet 2122 .

[0063] It can be understood that the two ends of the side gate 212 are the side gate inlet 2121 and the side gate outlet 2122, wherein the side gate inlet 2121 is used for the rubber in the second material guide groove 213 to flow in, and the side gate outlet 2122 is used for the rubber in the side gate 212 to flow out, so that the rubber can be injected into the cavity 11. In this way, during the injection molding process, the cross-sectional area of ​​the flow channel of the rubber in the side gate 212 tends to decrease, so that the rubber can gradually converge when flowing in the side gate 212, further ensuring the continuity of the injection, and further improving the injection molding quality of the product.

[0064] like Figure 7 and Figure 8 As shown, in some embodiments of the injection mold 10 , the side gate 212 is connected to the side of the top of the cavity 11 .

[0065] It can be understood that the upper and lower surfaces of the cavity 11 are formed by the first mold core 12 and the second mold core 13 respectively, and the side gate 212 is connected to the side of the top of the cavity 11, which can prevent the gate formed by the excess rubber in the side gate 212 from being directly connected to the upper and lower surfaces of the cavity 11, thereby preventing the gate from leaving marks on the upper and lower surfaces of the injection molded part 40 after removal, thereby ensuring the smoothness of the upper and lower surfaces of the product (see Fig. 9 and Fig.10 ).

[0066] like Fig.11 As shown, in some embodiments of the injection mold 10 , the cavity 11 is U-shaped.

[0067] It can be understood that the shape of the injection molded part 40 formed by the cavity 11 in this type of embodiment will also be U-shaped.

[0068] It should be noted that if this type of embodiment is set together with the side content of the side gate 212 connected to the top of the cavity 11, the side gate 212 will be connected to the top of the U-shaped cavity 11, thereby preventing the formation of a gate on the upper and lower surfaces of the U-shaped injection molded part 40, thereby preventing the gate from leaving marks on the upper and lower surfaces of the U-shaped injection molded part 40 after removal, and at the same time improving the smoothness of the upper and lower surfaces of the U-shaped injection molded part 40, providing transparency of the two injection molded parts 40.

[0069] like Figure 7 and Fig.10 As shown, in some embodiments of the injection mold 10 , the side gate 212 is in a conical bell-mouth shape.

[0070] It can be understood that the conical trumpet-shaped side gate 212 can gradually gather the rubber, and the rubber is injected into the cavity 11 after being gathered, which can avoid the formation of bubbles in the flow direction of the rubber, ensure the continuity of the rubber injection of the mold, and improve the injection molding quality of the injection molded part 40.

[0071] like Figures 2 to 5 As shown, in some embodiments of the injection mold 10 , the molding assembly 1 further includes a panel 14 , the panel 14 is attached to the second mold core 13 , and the upper end of the nozzle 21 is connected to the panel 14 .

[0072] It can be understood that the panel 14 is used to drive the nozzle 21 to move. The panel 14 can be configured to be directly set on the second mold core 13 through a sliding connection structure, and can also be configured to be slidably connected to the second mold core 13 in an indirect connection manner through a sliding connection structure. The upper end of the nozzle 21 can be connected to the panel by clamping, bolting, bonding, and other connection structures in the prior art in a selected or combined manner.

[0073] It should be noted that the movement of the panel 14 drives the nozzle 21 to switch between the first position P1 and the second position, so that the nozzle 21 can successfully complete the injection molding and gate removal work.

[0074] like Figure 3 and Figure 5 As shown, in some embodiments of the injection mold 10, a step hole 141 is provided on the panel 14 and penetrates the thickness thereof, and the step hole 141 is connected to and faces the through hole 133; a mounting step 214 is provided on the nozzle 21, and the upper end of the nozzle 21 is limited in the step hole 141 by the mounting step 214.

[0075] It can be understood that the step hole 141 is composed of two or more coaxial holes of different diameters, which are connected in the depth direction to form a step-like structure. The mounting step 214 is composed of two or more coaxial bosses of different sizes, which are connected in the thickness direction to form a step-like structure.

[0076] The step hole 141 and the installation step 214 are adapted to each other. The upper end of the nozzle 21 is inserted into the step hole 141 accordingly. The outer wall of the installation step 214 will be abutted against the hole wall of the step hole 141, and the contour structures of the two are adapted to each other. In this way, the connection reliability between the nozzle 21 and the panel 14 can be improved.

[0077] Of course, the nozzle 21 and the panel 14 may be further connected by bolts, clamping, bonding or welding on the basis of being installed and matched through the step hole 141 and the installation step 214, so as to further fix the relative position of the nozzle 21 and the panel 14.

[0078] In some embodiments of the injection mold 10 , a plurality of through holes 133 penetrating the second mold core 13 in the thickness direction thereof are formed; the injection mold 10 includes a plurality of nozzles 21 , and each nozzle 21 is slidably disposed in each through hole 133 in a one-to-one correspondence.

[0079] It can be understood that in this type of embodiment, a plurality of nozzles 21 are provided, and each nozzle 21 is used for introducing the rubber material, that is, the rubber material can be introduced into the mold cavity 11 through each nozzle 21 respectively.

[0080] It should be noted that a plurality of cavities may be provided on the injection mold 10, and each nozzle 21 may be configured to correspond to each cavity 11, so that a plurality of injection molded parts 40 may be simultaneously injection molded in a single injection cycle. Of course, the injection mold 10 may be configured to simultaneously perform injection molding on a plurality of cavities 11 through one nozzle 21 (see Figure 7 and Fig. 9), it can also be configured to jointly perform injection molding on one injection cavity 11 through multiple nozzles 21. The specific adjustment depends on the processing requirements of the injection molded part 40, but even so, each nozzle 21 will slide from the first position P1 to the second position after the injection molding is completed, so that the gates formed by each nozzle 21 can be removed.

[0081] In some embodiments of the injection mold 10, a plurality of independent cavities 11 are defined when the molding component 1 is molded, a plurality of side gates 212 are provided on the nozzle 21, each side gate 212 is respectively connected to a feed channel 211, and each side gate 212 is connected to each cavity 11 one by one.

[0082] It can be understood that each cavity 11 can independently mold an injection molded part 40, and a single nozzle 21 can be used to simultaneously inject rubber into multiple cavities 11, thereby improving the injection molding efficiency of the injection mold 10 while avoiding an increase in the manufacturing cost of the injection mold 10.

[0083] like Fig.12 As shown, in some embodiments of the injection mold 10, the cross-section (i.e., the longitudinal cross-section) of the side gate 212 is flat, specifically, the vertical dimension is small and the lateral dimension is large, for example, it can be elliptical, rectangular, oval, etc.

[0084] It can be understood that the flat and wide side gate 212 can provide more space for the rubber material to flow, thereby avoiding various problems of poor injection molding surface caused by the rubber material flowing in too narrow a space.

[0085] like Figures 5 to 8 As shown, in some embodiments of the injection mold 10 , a first molding surface 111 and a second molding surface 112 are provided in the cavity 11 , and when the nozzle 21 slides to the first position P1 , the side gate 212 faces the gap between the first molding surface 111 and the second molding surface 112 .

[0086] It can be understood that the side gate 212 is precisely aligned with the interval area between the first molding surface 111 and the second molding surface 112. In this way, the gate corresponding to the side gate 212 will not appear on the first molding surface 111 or the second molding surface 112, that is, the side gate will be located between the first molding surface 111 and the second molding surface 112.

[0087] Before opening the mold, the nozzle 21 will slide away from the first position P1. The nozzle 21 sliding away from the first position P1 will drive the side gate 212 to move together, so that the side gate 212 and the cavity 11 are misaligned, and the side gate 212 is no longer aligned with the original rubber injection path. Since the injection molded part 40 has been initially solidified at this time, the movement of the side gate 212 will cause the gate part connected to the injection molded part 40 to break due to force, and automatic removal is achieved. This not only saves the complicated process of traditional manual gate removal, but also reduces the damage or unevenness that may be introduced by manual operation, ensures the smoothness and neatness of the edge of the injection molded part, and greatly improves the appearance quality and production efficiency of the product. At the same time, the gate connection position after removal will not remain on the two opposite sides of the injection molded part 40 where the smoothness needs to be ensured.

[0088] After removing the gate, the molding component 1 is opened to expose the injection molded part 40 that has been cooled and molded in the cavity 11. At this time, the staff can directly take out the injection molded part 40 with the gate removed, further improving the production and processing efficiency of the product.

[0089] In addition to the above, it should be noted that in order to enable the first molding surface 111 and the second molding surface 112 to form a smoother surface on the injection molded part, the first molding surface 111 and the second molding surface 112 can be subjected to surface finish treatment so that the corresponding contacting rubber can be cooled and formed into a surface that meets the smoothness requirements.

[0090] Furthermore, the surfaces formed by the first molding surface 111 and the second molding surface 112 on the injection molded part 40 may be plane surfaces, curved surfaces or irregular surfaces.

[0091] like Figures 2 to 5 As shown, in some embodiments of the injection mold 10, the first molding surface 111 is located on the first mold core 12 (see Figure 6 and Figure 8 ), the second molding surface 112 is located on the second mold core 13 (see Figure 4 , Figure 5 and Figure 8 ), the nozzle 21 is slidably disposed on the second mold core 13.

[0092] It can be understood that the first mold core 12 and the second mold core 13 are adapted to each other in appearance, and the two are precisely molded together by the injection molding equipment and opened when necessary. The nozzle 21 and the second mold core 13 can be configured to be connected by a sliding structure in the relevant technology. Of course, the relative sliding of the two can also be achieved by driving the injection molding equipment, and the nozzle 21 can also be fixed by other intermediate elements slidably arranged on the second mold core 13, so that the sliding of the nozzle 21 relative to the second mold core 13 can also be achieved by sliding the intermediate element.

[0093] like Figures 3 to 5 As shown, in some embodiments of the injection mold 10, a molding ridge 121 is provided on the first mold core 12, and a plurality of molding grooves 1211 are provided on the molding ridge 121 (the molding grooves 1211 can also be seen in Figure 6 ); The second mold core 13 is provided with a positioning groove 131 (the positioning groove 131 can also be seen in Figure 7 ).

[0094] Please also read Figures 6 to 8 The molding ridge 121 is configured to be inserted into the alignment groove 131 when the mold is closed, so that the molding ridge 121 abuts against the inner wall of the alignment groove 131, so that the inner wall of the alignment groove 131 covers each molding groove 1211, and then the inner wall of the alignment groove 131 and the inner wall of the molding groove 1211 jointly enclose the mold cavity 11.

[0095] It can be understood that the outer contour of the molding ridge 121 allows the molding groove 1211 provided thereon to extend along the outer contour, so that the injection molded part 40 can be molded into a corresponding surface along the surface contour and undulation degree of the molding ridge 121.

[0096] The alignment groove 131 is used to position the molding ridge 121 on the one hand, thereby improving the mold clamping accuracy, and is also used to shield the molding groove 1211, so that the inner wall surface of the molding groove 1211 and the inner wall surface of the alignment groove 131 can jointly enclose a relatively closed space, namely, the mold cavity 11, and then the rubber material can be injected into it without leakage. In this way, the production and processing accuracy of the product can be effectively improved.

[0097] like Figures 3 to 5 As shown, in some embodiments of the injection mold 10, a plurality of limiting grooves 122 are further provided on the first mold core 12, and both ends of each molding groove 1211 are respectively connected to two limiting grooves 122, and a plurality of limiting protrusions 132 are provided on the second mold core 13. Each limiting protrusion 132 is configured to be inserted into each limiting protrusion 132 one by one when the mold is closed.

[0098] It can be understood that the limiting groove 122 is adjacent to the molding groove 1211, and each molding groove is connected to a limiting groove 122 at both ends. The limiting groove 122 is connected to the end of the molding groove 1211, which can prevent the end of the injection molded part 40 from being stuck at the end of the molding groove 1211. At the same time, the plug-in cooperation between the limiting groove 122 and the limiting protrusion 132 also plays a role in auxiliary positioning, providing a precise docking interface for the subsequent insertion of the limiting protrusion.

[0099] In some embodiments, the outer shape of the limiting protrusion 132 can be configured as a prism, rectangle or trapezoid, etc., and the groove wall contour of the limiting groove 122 can be set corresponding to the outer contour of the limiting protrusion 132, so that the outer side wall of the limiting protrusion 132 inserted therein can fully contact the groove wall of the limiting groove 122, so as to achieve precise positioning to improve the mold closing accuracy, thereby improving the dimensional specification accuracy of the injection molded part.

[0100] like Figure 3 , Figure 5 and Figure 6 As shown, in some embodiments of the injection mold 10, a avoidance groove 1212 is further provided on the molding convex ridge 121, a first material guide groove 1213 is provided at the bottom of the avoidance groove 1212, a plurality of feed notches 1214 are provided on the groove wall of the avoidance groove 1212, and each feed notch 1214 is connected to each molding groove 1211 in a one-to-one correspondence; a second material guide groove 213 is provided on the surface of the nozzle 21 facing the molding convex ridge 121;

[0101] Among them, the nozzle 21 is configured to be removably inserted into the avoidance groove 1212 when the mold is closed, so that each side gate 212 is aligned with each feed notch 1214, and the first guide groove 1213 and the second guide groove 213 together enclose a guide channel 3, which connects the feed channel 211 and the side gate 212 respectively.

[0102] It can be understood that the avoidance groove 1212 is located on the molding ridge 121, providing space for the insertion of the nozzle 21. The groove wall of the avoidance groove 1212 is provided with a feed notch 1214, each of which is connected to the molding groove 1211, ensuring that the rubber material can be injected into each molding groove 1211 through each feed notch 1214.

[0103] The second material guide groove 213 corresponds to the first material guide groove 1213 in the avoidance groove 1212. When the nozzle 21 is inserted into the avoidance groove 1212 during mold closing, the two together constitute a continuous material guide channel 3. It should be noted that after the mold is opened, the first material guide groove 1213 and the second material guide groove 213 will separate from each other, so that the plastic part filled in the material guide channel 3 can be exposed, which is convenient for directly taking out the excess part; wherein, since the side gate has completed the cutting and separation, the excess part can be directly taken out. In this way, the excess rubber can be quickly removed after the injection molding process, so that the injection mold 10 can quickly enter a new round of injection molding.

[0104] In addition to the above, the injection molded part 40 is injection molded in the molding cavity 11; please refer to Fig. 9 and Fig.10The injection molded part 40 has a first smooth surface 41 and a second smooth surface 42. The first smooth surface 41 and the second smooth surface 42 are arranged opposite to each other. The first smooth surface 41 is molded on the first molding surface 111, and the second smooth surface 42 is molded on the second molding surface 112. The gate position 44 of the injection molded part 40 is on the side surface 43 of the injection molded part 40, and the side surface 43 is located between the first smooth surface 41 and the second smooth surface 42.

[0105] It can be understood that the contour of the first smooth surface 41 on the injection molded part 40 corresponds to the contour of the first molding surface 111, and the contour of the second smooth surface 42 corresponds to the contour of the second molding surface 112. Accordingly, since the first smooth surface 41 and the second smooth surface 42 are both configured to have a high degree of smoothness, the surfaces of the first molding surface 111 and the second molding surface 112 both need to be processed to have a high degree of smoothness to ensure that the rubber material in contact therewith can form a surface that meets the smoothness requirements after cooling and molding.

[0106] The gate position 44 is located on the side surface 43 of the injection molded part, that is, between the first smooth surface 41 and the second smooth surface 42, so that the smoothness and flatness of the two surfaces are not affected during the injection molding process. The mold design also allows the gate to be automatically cut off when the mold is opened, thereby reducing post-processing steps and improving production efficiency.

[0107] The implementation of this application has the following beneficial effects:

[0108] The present application relates to an injection mold. After the injection molding is completed and before the mold is opened, the gate on the injection molded part can be cut and removed by sliding the nozzle away from a first position. This not only avoids the tedious manual removal of the gate, effectively improves the processing and production efficiency of the product, effectively saves manpower, but also avoids the operational risks of manually using a gate cutting tool; it also improves the processing consistency of the injection molded parts.

[0109] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments have their own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily required for the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0110] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An injection mold, characterized in that: include: A molding assembly (1) comprises a first mold core (12) and a second mold core (13); the first mold core (12) and the second mold core (13) define a mold cavity (11) when the first mold core (12) and the second mold core (13) are molded together; and the second mold core (13) is provided with a through hole (133) penetrating the second mold core (13) in a thickness direction thereof; and A nozzle (21) having a feed channel (211) and a side gate (212) connected to the feed channel (211) and penetrating the nozzle (21), wherein the side gate (212) is located on a side of the nozzle (21), and the nozzle (21) is slidably disposed in the through hole (133) along the thickness direction of the second mold core (13) to switch between a first position (P1) and a second position; At the first position (P1), the side gate (212) of the nozzle (21) is connected to the cavity (11), and the rubber material can enter the cavity (11) from the feed channel (211); during the demolding process, the nozzle (21) can move from the first position (P1) to the second position, and the excess rubber material after molding in the side gate (212) can be cut off by the second mold core (13).

2. The injection mold according to claim 1, characterized in that: The lower end surface of the nozzle (21) is open to form a second material guide groove (213) connected to the side gate (212).

3. The injection mold according to claim 2, characterized in that: The side gate (212) extends obliquely upward from the second material guide groove (213).

4. The injection mold according to claim 2, characterized in that: The side gate (212) comprises a side gate inlet (2121) and a side gate outlet (2122), the side gate inlet (2121) is connected to the second material guide groove (213), and the flow channel cross-sectional area of ​​the side gate inlet (2121) is greater than the flow channel cross-sectional area of ​​the side gate outlet (2122).

5. The injection mold according to claim 1, characterized in that: The side gate (212) has a flat cross section.

6. The injection mold according to claim 1, characterized in that: The side gate (212) is connected to the side of the top of the cavity (11); and / or The cavity (11) is U-shaped; and / or The side gate (212) is in a conical trumpet shape.

7. The injection mold according to claim 1, characterized in that: The second mold core (13) is provided with a plurality of through holes (133) penetrating the second mold core (13) in its thickness direction; The injection mold comprises a plurality of nozzles (21), and each nozzle (21) is slidably disposed in each through hole (133) in a one-to-one correspondence.

8. The injection mold according to claim 1, characterized in that: When the molding component (1) is molded, a plurality of independent cavities (11) are defined, and a plurality of side gates (212) are provided on the nozzle (21), each of the side gates (212) is connected to the feed channel (211), and each of the side gates (212) is connected to each of the cavities (11) in a one-to-one correspondence.

9. The injection mold according to any one of claims 1 to 8, characterized in that: The molding assembly (1) further comprises a panel (14), wherein the panel (14) is attached to the second mold core (13), and the upper end of the nozzle (21) is connected to the panel (14).

10. The injection mold according to claim 9, characterized in that: The panel (14) is provided with a stepped hole (141) penetrating the thickness thereof, and the stepped hole (141) is connected to and faces the through hole (133); The nozzle (21) is provided with a mounting step (214), and the upper end of the nozzle (21) is limited in the step hole (141) by the mounting step (214).

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