Mold core assembly of injection mold

Abstract

The mold core assembly is suitable for forming a workpiece with a containing groove and a rotating shaft seat, an opening of the containing groove is arranged backwards, an opening of the rotating shaft seat is arranged forwards, the mold core assembly comprises a fixed mold core and a movable mold core, the movable mold core is arranged on a front mold, the fixed mold core is arranged on a rear mold, and the movable mold core is arranged on the rear mold. The outer wall of the fixed mold core is suitable for defining the inner wall of the containing groove, the movable mold cores are movably connected with the mold, and after the mold is closed, the movable mold cores are suitable for being combined with one another and defining the inner wall of the outer side of the cavity. The mold core assembly of the injection mold is small in size and low in production cost.

Description

Technical Field

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

[0002] At present, the glove box bucket is usually rotatably connected to the glove box, which can help the driver or passengers to store and sort some small items more conveniently, such as change, mobile phone chargers, car keys, etc. The glove box bucket of some models can also be used to place important documents such as documents, vehicle registration certificates, insurance policies, etc. The design of the glove box bucket can improve the practicality and convenience of the glove box, making the items in the car more organized and easier to access. The glove box bucket usually includes the following structures: a receiving groove and a rotating shaft seat. The receiving groove is used to complete the core storage function of the glove box bucket, and the rotating shaft seat is suitable for installing a rotating shaft and realizing the rotatable connection between the glove box bucket and the glove box, thereby achieving quick opening and closing.

[0003] However, the existing core mold components used to produce the inner bucket of the glove box are large in size and have high production costs, which are technical problems that need to be solved by technical personnel in this field. Summary of the invention

[0004] One object of the present application is to provide a core assembly of an injection mold with a smaller volume and lower production cost.

[0005] In order to achieve the above objectives, the technical solution adopted in this application is:

[0006] A core assembly of an injection mold, the core assembly is suitable for molding a workpiece having a receiving groove and a rotating shaft seat, the opening of the receiving groove is arranged rearwardly, and the opening of the rotating shaft seat is arranged forwardly, the core assembly includes a fixed mold core and a movable mold core, the movable mold core is arranged on a front mold, and the fixed mold core is arranged on a rear mold, the outer wall of the fixed mold core is suitable for defining the inner wall of the receiving groove, the movable mold core has multiple groups and is movably connected to the mold, and when the mold is closed, the multiple groups of movable mold cores are suitable for combining with each other and defining the outer and inner walls of the cavity.

[0007] Further preferably, the movable mold core includes a base mold core and a movable core, the base mold core is fixedly mounted on the front mold, the movable core has multiple groups and is relatively arranged on the circumference of the base mold core, the movable core is movably connected to the front mold, and when the molds are closed, the movable core and the base mold core are suitable for cooperating with each other and defining the outer and inner walls of the cavity, the movable core and the base mold core jointly define a rotating shaft seat cavity, and the rotating shaft seat cavity is suitable for forming the rotating shaft seat.

[0008] Further preferably, the shaft seat is provided with a shaft groove suitable for accommodating the shaft, the shaft groove extends in the up-down direction, and the notch of the shaft groove is arranged forward, the shaft seat includes a necking seat, the neck of the shaft groove shrinks inwardly to form the necking seat, the movable core includes a locking mold core and a hydraulic mold core, the locking mold core has two groups and is respectively arranged on the left and right sides of the base mold core, the hydraulic mold core has two groups and is respectively arranged on the upper and lower sides of the base mold core, the base mold core and the locking mold core jointly define a necking cavity, and a necking protrusion is provided on the hydraulic mold core in the up-down direction, and the necking protrusion is suitable for invading the necking cavity and cooperating to form the necking seat.

[0009] Further preferably, the shaft seat includes a flared seat, the neck of the shaft groove expands outward or remains unchanged to form the flared seat, the base mold core and the locking mold core jointly define a flared cavity, and the flared cavity is suitable for forming the flared seat.

[0010] Further preferably, the rear mold is provided with a locking rod protruding forward along the front-to-back direction, and the locking mold core is provided with a driving hole matching the locking rod, and the locking rod is suitable for being inserted into the driving hole. When the mold is opened, the rear mold moves backward and drives the locking rod to move backward, thereby driving the locking mold cores on the left and right sides to move toward the left and right sides respectively, thereby realizing the separation of the locking mold core from the inner bucket of the glove box; the mold also includes a hydraulic driving source, and under the action of the hydraulic driving source, the hydraulic mold core moves along the upper and lower sides respectively, and realizes the separation of the hydraulic mold core from the inner bucket of the glove box.

[0011] Further preferably, the movable core includes a locking mold core and a hydraulic mold core, the locking mold core has two groups and are respectively arranged on the left and right sides of the base mold core, the hydraulic mold core has two groups and are respectively arranged on the upper and lower sides of the base mold core, and a buffer surface is provided on the base mold core, the buffer surface has an angle α with the opening and closing direction of the mold, satisfying 0°<α≤90°, and the buffer surface is suitable for cooperating with the fixed mold core and forming the bottom of the accommodating groove.

[0012] Further preferably, a buckle cavity is further provided in the movable mold core, and the buckle cavity is suitable for forming a buckle portion provided on the same side as the rotating shaft seat, and the base mold core and the locking mold core are suitable for jointly defining the buckle cavity, and the buckle portion is suitable for movably connecting the glove box inner bucket and the glove box, and controlling the flow speed of the plastic raw material in the cavity.

[0013] Further preferably, at least one reinforcement part is respectively provided on the outside of the upper and lower sides of the inner bucket of the glove box, a reinforcement cavity suitable for molding the reinforcement part is provided in the movable mold core, the locking mold core and the hydraulic mold core are suitable for jointly defining the reinforcement cavity, and the reinforcement part is suitable for controlling the connection strength of the left and right sides and the upper and lower sides of the inner bucket of the glove box, and controlling the flow speed of the plastic raw material in the cavity.

[0014] Further preferably, a water cavity is provided in the movable mold core, the movable core and the base mold core jointly define the water cavity, and the water cavity is connected to the mold cavity, the plastic raw material is suitable for passing through the water cavity and entering the mold cavity, the water cavity includes a plane inner wall and a curved inner wall, the plane inner wall is arranged on the base mold core, and the curved inner wall is arranged on the movable core.

[0015] Compared with the prior art, the beneficial effect of the present application is that: since the opening of the receiving groove and the opening of the rotating shaft seat are arranged along the direction of mold opening and closing in the present application, and the opening of the receiving groove and the opening of the rotating shaft seat are in opposite directions, the receiving groove can be demolded from the mold during the mold opening process, and by using a movable mold core, after the injection molding is completed, the movable mold core is separated from the rotating shaft seat by controlling the movement of the movable mold core, thereby greatly reducing the mold size, so that the mold of the present application can be placed on a smaller injection molding machine for production, thereby reducing the injection molding production cost and mold manufacturing cost, and improving the injection molding production cycle to a certain extent. (For one-in-one molds, the injection molding efficiency of large injection molding machines is generally lower than that of small injection molding machines) BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an embodiment of the injection mold in the present application, showing a front mold and a rear mold;

[0017] Figure 2 A schematic diagram of a workpiece of an embodiment of an injection mold in the present application;

[0018] Figure 3 A schematic diagram of a workpiece of an embodiment of an injection mold in the present application from another angle;

[0019] Figure 4 It is a partial enlarged view of an embodiment of the injection mold in the present application, showing the locking seat;

[0020] Figure 5 It is a partial enlarged view of an embodiment of the injection mold in the present application, showing the flared seat;

[0021] Figure 6 An exploded view of an embodiment of the injection mold in the present application;

[0022] Figure 7 A schematic diagram of a movable mold core of an embodiment of an injection mold in the present application;

[0023] Figure 8 A front view of a movable mold core of an embodiment of an injection mold in the present application;

[0024] Fig. 9 A rear view of a movable mold core of an embodiment of an injection mold in the present application;

[0025] Fig.10 A schematic diagram of a movable mold core of an embodiment of an injection mold in the present application;

[0026] Fig.11 A front view of a movable mold core of an embodiment of an injection mold in the present application, showing a separated state;

[0027] Fig.12 A rear view of a movable mold core of an embodiment of an injection mold in the present application, showing a separated state;

[0028] Fig.13 A schematic diagram of a movable mold core of an embodiment of an injection mold in the present application, showing a necking cavity;

[0029] Fig.14 A schematic diagram of a movable mold core of an embodiment of an injection mold in the present application, showing an expansion cavity;

[0030] Fig.15 A schematic diagram of a movable mold core of an embodiment of an injection mold in the present application, showing a buffer surface;

[0031] Fig.16 It is a schematic diagram of an embodiment of the injection mold in the present application.

[0032] In the figure: 1. movable mold core; 11. base mold core; 111. buffer surface; 12. movable core; 121. locking mold core; 1211. driving hole; 122. hydraulic mold core; 1221. necking protrusion; 13. shaft seat cavity; 131. necking cavity; 132. expansion cavity; 14. water cavity; 141. plane inner wall; 142. curved inner wall; 15. buckle cavity; 16. reinforcing rib cavity; 2. fixed mold core; 3. front mold; 31. ejector assembly; 4. rear mold; 41. locking rod; 100. workpiece; 101. shaft seat; 1011. expansion seat; 1012. necking seat; 1013. shaft groove; 102. buckle portion; 103. accommodating groove; 1031. groove bottom; 104. water outlet; 105. reinforcing rib portion. DETAILED DESCRIPTION

[0033] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating 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 cannot be understood as limiting the specific scope of protection of the present application.

[0035] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0036] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0037] The inventor of the present application has found through further research on the product that the mold structure of the workpiece 100 in the prior art is complex and the manufacturing process is high mainly because:

[0038] (1) The product structure of the workpiece 100 is relatively complex. In addition to the rotating shaft seat 101 and the receiving groove 103, it also has a plurality of buckle portions 102 and a reinforcing rib portion 105. The demoulding directions of these buckle portions 102 and the reinforcing rib portion 105 are different. In order to reduce the manufacturing cost of the mold and reduce the number of sliders as much as possible, the notch of the receiving groove 103 is usually set upward or downward to facilitate the demoulding of other parts. However, since the receiving groove 103 of the workpiece 100 is relatively deep, the slider used to form the receiving groove 103 is relatively large in size and has a relatively long moving distance, which makes it difficult to reduce the volume of the existing injection mold;

[0039] (2) It is also necessary to set up a plurality of sliders to cooperate with the male mold core to realize the demolding of the buckle portion 102 and the reinforcing rib portion 105. In order to accommodate these sliders and allow these sliders to have sufficient movement space, the mold volume will inevitably increase.

[0040] Based on this, the inventor of the present application has developed an injection mold for producing a workpiece 100, one embodiment of which is as follows: Figures 1 to 16 As shown, the front mold 3 and the rear mold 4 are included, and a cavity for molding a workpiece 100 is defined between the front mold 3 and the rear mold 4. The workpiece 100 includes a receiving groove 103 and a rotating shaft seat 101. The opening of the receiving groove 103 and the opening of the rotating shaft seat 101 are both arranged along the mold opening and closing direction (in this specific embodiment, the mold opening and closing direction is the front-to-back direction), and the opening of the receiving groove 103 and the opening of the rotating shaft seat 101 are opposite to each other (such as Figure 2 and Figure 3 As shown in the figure, the mold includes a fixed mold core 2 and a movable mold core 1. The outer wall of the fixed mold core 2 is suitable for defining the inner wall of the receiving groove 103. The movable mold core 1 has multiple groups and is movably connected to the mold. When the mold is closed, the multiple groups of movable mold cores 1 are suitable for combining with each other and defining the outer inner wall of the cavity. It is worth mentioning that due to the setting of the receiving groove 103, the cavity has an outer inner wall and an inner inner wall. Specifically, the outer inner wall of the cavity is suitable for molding the outer surface of the workpiece 100, and the inner inner wall of the cavity is suitable for molding the groove wall of the receiving groove 103 (that is, the inner wall of the receiving groove 103).

[0041] Since the opening of the receiving groove 103 and the opening of the rotating shaft seat 101 are arranged along the direction of mold opening and closing in the present application, and the opening of the receiving groove 103 and the opening of the rotating shaft seat 101 are in opposite directions, the receiving groove 103 can be demoulded from the mold during the mold opening process, and the movable mold core 1 is used. After the injection molding is completed, the movable mold core 1 is separated from the rotating shaft seat 101 by controlling the movement of the movable mold core 1, thereby greatly reducing the mold size. Specifically, the original size of the original mold is 1275mm (height) * 1077mm (width), which can only be placed on a 1200T injection molding machine for production, with high power consumption and greatly limited injection molding cycle; the mold size of the present application is 1198mm (height) * 856mm (width), which can be placed on a 650T injection molding machine for production, greatly reducing the cost of injection molding production, and the injection molding cycle time can also be further shortened. (For one-in-one molds, the injection molding efficiency of large injection molding machines is generally lower than that of small injection molding machines)

[0042] It is worth mentioning that, compared with the existing design, the mold of the present application has multiple movable mold cores 1, and after the mold is closed, the multiple groups of movable mold cores 1 are combined with each other and define the outer and inner walls of the cavity. Therefore, the mold core volume of the mold of the present application will be greatly reduced, and there is no need to additionally add a slider assembly to cooperate with the mold core to form multiple structures of the workpiece 100 that are difficult to be directly separated from the cavity after the mold is opened, such as the buckle portion 102, the reinforcing rib portion 105, and the shaft seat 101 for convenient demolding. The cavity can be generated by mutual combination, and the product (workpiece 100) can be separated from the mold (that is, demolding) by mutual separation. Therefore, the lateral size (left and right direction) and longitudinal size (up and down direction) of the mold of the present application are greatly reduced, and compared with the prior art, the ejection assembly 31 can be set as little as possible. Due to the setting of the movable mold core 1, the separation of the workpiece 100 from the mold is more convenient, and the demolding speed is also faster, which can reduce the production cycle to a certain extent (effectively reduce the demolding time and ejection time) and improve production efficiency.

[0043] Further preferably, Figure 6 As shown, the movable mold core 1 is arranged on the front mold 3, and the fixed mold core 2 is arranged on the rear mold 4. The movable mold core 1 includes a base mold core 11 and a movable core 12. The base mold core 11 is fixedly installed on the front mold 3. The movable core 12 has multiple groups and is relatively arranged on the circumference of the base mold core 11. The movable core 12 is movably connected to the front mold 3. When the mold is closed, the movable core 12 and the base mold core 11 are suitable for cooperating with each other and defining the outer and inner walls of the cavity. The movable core 12 and the base mold core 11 jointly define the shaft seat cavity 13, and the shaft seat cavity 13 is suitable for forming the shaft seat 101.

[0044] It is worth mentioning that in the prior art, the ejector assembly 31 is usually arranged on the rear mold 4. After the mold is opened, the ejector assembly 31 is driven by the ejector rod on the injection molding machine to move, thereby achieving complete demolding of the mold. Due to the structural limitations of the injection molding machine, the ejector rod cannot be directly driven to move during the mold opening process (which may easily lead to interference or safety risks). In addition, since the structure of the workpiece 100 is relatively complex, the setting direction and ejection speed of the ejector structure are limited. High-speed ejection is likely to leave ejector marks, resulting in problems such as reduced product appearance. In the present application, the fixed mold core 2 is arranged on the rear mold 4. The movable mold core 1 is arranged on the front mold 3, so during the mold opening process, the rear mold plate on the injection molding machine drives the rear mold 4 to move, thereby realizing the separation of the workpiece 100 from the rear mold 4; then, by controlling the movement of the movable mold core 1, the movable mold cores 1 are separated from each other and the workpiece 100 is separated from the front mold 3, and the demolding speed is faster. Moreover, since the base mold core 11 is arranged, the workpiece 100 can stay on the base mold core 11, which is convenient for subsequent ejection. Since the contact area between the base mold core 11 and the workpiece is small, the setting of the ejection component 31 and the restriction of the ejection speed are both small, which is more conducive to rapid production.

[0045] In addition, if Figure 8 and Fig. 9 As shown, the movable mold core 1 and the base mold core 11 are combined to form the outer and inner walls of the cavity; Fig.14 and Fig.15 As shown, it is shown that the movable mold core 1 and the base mold core 11 are separated from each other and facilitate the separation of the workpiece 100. In the actual production process, after the mold is opened, each group of movable mold cores 1 moves away from each other, so that the workpiece 100 can stay on the base mold core 11, which is convenient for subsequent ejection. If the base mold core 11 is not provided, after the movement of each group of movable mold cores 1 separating from each other, the workpiece 100 is easy to fall directly, causing problems such as strain or product damage.

[0046] Further preferably, the front mold 3 is further provided with an ejector assembly 31, the head of the ejector assembly 31 is movably connected to the base mold core 11, and when ejection is required, the ejector assembly 31 is adapted to abut against the groove bottom 1031 of the accommodating groove 103, and separate the workpiece 100 from the movable mold core 1. Since the workpiece 100 will stay on the base mold core 11 after each group of movable cores 12 move away from each other, the ejector assembly 31 movably connected to the base mold core 11 is then driven, so that the ejector assembly 31 ejects the workpiece 100, effectively reducing the ejection time and increasing the ejection speed.

[0047] Further preferably, Fig.13 As shown, the shaft seat 101 is provided with a shaft groove 1013 suitable for accommodating the shaft, the shaft groove 1013 extends in the up-down direction, and the notch of the shaft groove 1013 is arranged forward, the shaft seat 101 includes a necking seat 1012, the neck of the shaft groove 1013 shrinks inwardly to form the necking seat 1012, the movable core 12 includes a locking mold core 121 and a hydraulic mold core 122, the locking mold core 121 has two groups and is respectively arranged on the left and right sides of the base mold core 11, the hydraulic mold core 122 has two groups and is respectively arranged on the upper and lower sides of the base mold core 11, the base mold core 11 and the locking mold core 121 jointly define a necking cavity 131, and a necking protrusion 1221 is arranged on the hydraulic mold core 122 in the up-down direction, and the necking protrusion 1221 is suitable for invading the necking cavity 131 and cooperating to form the necking seat 1012. It is worth mentioning that the notch of the shaft groove 1013 is arranged forward, which means that the notch of the shaft groove 1013 is arranged along the mold opening and closing direction. Figure 4 As shown, the neck of the shaft groove 1013 contracts inwardly, thereby limiting the displacement of the shaft and preventing the shaft from directly escaping from the shaft groove 1013 during use.

[0048] In order to facilitate demoulding, the locking mold core 121 and the base mold core 11 are respectively used to define the necking cavity 131, which is used to form the outer wall of the rotating shaft seat 101, and the necking protrusion 1221 is provided to form the rotating shaft groove 1013 of the necking seat 1012. When demoulding is required, Figures 14 to 16 As shown, by driving the locking mold core 121 and the hydraulic mold core 122 to move in the direction of the arrows, the demoulding of the necking seat 1012 is achieved. In this specific embodiment, since the locking mold core 121 has two groups and is respectively arranged on the left and right sides of the base mold core 11, and the hydraulic mold core 122 has two groups and is respectively arranged on the upper and lower sides of the base mold core 11, the locking mold core 121 can be driven to move in the left and right direction, and the hydraulic mold core 122 can be driven to move in the up and down direction to achieve rapid demoulding, and the mold structure is compact, the manufacturing cost is lower, and the injection molding production cost is also lower. (More conducive to production on a small injection molding machine)

[0049] Further preferably, Figure 5 and Fig.12 As shown, the shaft seat 101 includes an expansion seat 1011 , the neck of the shaft groove 1013 expands outward or remains unchanged to form the expansion seat 1011 , the base mold core 11 and the locking mold core 121 jointly define an expansion cavity 132 , and the expansion cavity 132 is suitable for forming the expansion seat 1011 .

[0050] It is worth mentioning that the expansion seat 1011 and the necking seat 1012 are provided at the same time, which facilitates the installation of the workpiece 100 and simplifies the installation difficulty and the mold structure. The necking seat 1012 limits the shaft to be directly separated from the shaft groove 1013, while the expansion seat 1011 can be directly demoulded without adding other sliders, thereby further reducing the volume of the injection mold of the present application.

[0051] Specifically, if Fig.12 As shown, the expansion cavity 132 is defined by the base mold core 11 and the locking mold core 121. When the locking mold core 121 moves away from the base mold core 11, the expansion seat 1011 can be directly ejected under the action of the ejection assembly 31 without getting stuck or other problems.

[0052] Further preferably, Figure 6As shown, the rear mold 4 is provided with a locking rod 41 protruding forward along the front-to-back direction, and the locking mold core 121 is provided with a driving hole 1211 matching the locking rod 41. The locking rod 41 is suitable for being inserted into the driving hole 1211. When the mold is opened, the rear mold 4 moves backward and drives the locking rod 41 to move backward, thereby driving the locking mold cores 121 on the left and right sides to move toward the left and right sides respectively, thereby realizing the separation of the locking mold core 121 and the workpiece 100; the mold also includes a hydraulic driving source, and the hydraulic mold core 122 moves along the upper and lower sides respectively under the action of the hydraulic driving source, and realizes the separation of the hydraulic mold core 122 and the workpiece 100. By making the driving sources of the locking mold core 121 and the hydraulic mold core 122 different, the locking force between each movable core 12 can be controlled as needed, and the mold structure and use cost of the present application can be simplified. Specifically, the driving force and locking force of the locking mold core 121 are both generated by the movement of the rear mold 4. When the rear mold 4 is in a locked state relative to the front mold 3, the size of the locking mold core 121 is controlled by the locking force of the mold; and the locking force and driving force of the hydraulic mold core 122 are driven by the hydraulic driving source. Therefore, during the mold opening process, the locking mold core 121 and the hydraulic mold core 122 can move in steps, that is, first control the locking mold core 121 to move away from the workpiece 100, and then control the hydraulic mold core 122 to move away from the workpiece 100, thereby avoiding the problem of direct detachment of the workpiece 100 due to excessive separation speed, causing surface scratches or surface stains. And because the driving sources of the hydraulic mold core 122 and the locking mold core 121 are different, the speed and triggering time of the hydraulic mold core 122 can be adjusted as needed, thereby maximally reducing the injection cycle of the mold. In addition, by using a hydraulic driving source to drive the hydraulic mold core 122, the size of the mold will be further reduced, which is more conducive to production on a smaller injection molding machine.

[0053] Further preferably, Fig.15 As shown, the movable core 12 includes a locking mold core 121 and a hydraulic mold core 122. The locking mold core 121 has two groups and is respectively arranged on the left and right sides of the base mold core 11. The hydraulic mold core 122 has two groups and is respectively arranged on the upper and lower sides of the base mold core 11. The base mold core 11 is provided with a buffer surface 111. The buffer surface 111 has an angle α with the mold opening and closing direction, which satisfies 0°<α≤90°, and the buffer surface 111 is suitable for cooperating with the fixed mold core 2 and forming the groove bottom 1031 of the receiving groove 103. The buffer surface 111 can control the flow rate of the plastic jet to prevent the flow rate from being too high, which directly causes the problems of insufficient locking force of the movable core 12 and unnecessary flash. In addition, the buffer surface 111 can cooperate with the groove bottom 1031 of the receiving groove 103 to avoid unnecessary waste of materials caused by adding other components. By controlling the position and length of the buffer surface 111 , the clamping force can be controlled, thereby avoiding the need for excessive clamping force on the movable core 12 .

[0054] Further preferably, a snap-in cavity 15 is also provided in the movable mold core 1. The snap-in cavity 15 is suitable for forming a snap-in portion 102 provided on the same side as the rotating shaft seat 101. The base mold core 11 and the locking mold core 121 are suitable for jointly defining the snap-in cavity 15. The snap-in portion 102 is suitable for flexibly connecting the workpiece 100 and the glove box, and controlling the flow rate of the plastic raw material in the mold cavity. Setting the snap-in cavity 15 and forming the snap-in portion 102 has two functions. One is that it can be used as a snap-in position to flexibly connect the workpiece 100 and the glove box; the other is that it acts as a slow-flow cavity for the plastic fluid to limit the flow rate of the plastic raw material in the mold cavity. The plastic flow rate of the mold of the present application cannot be too fast or too slow. If it is too fast, the movable core 12 will easily expand during the injection molding process; if it is too slow, the plastic cannot fill the mold cavity. Therefore, the position and size of the snap-in cavity 15 can be set according to the needs to achieve the control of the injection flow rate.

[0055] Further preferably, Figure 2 and Fig.11 As shown, at least one reinforcing rib 105 is respectively provided on the outside of the upper and lower sides of the workpiece 100, and a reinforcing rib cavity 16 suitable for forming the reinforcing rib 105 is provided in the movable mold core 1, and the locking mold core 121 and the hydraulic mold core 122 are suitable for jointly defining the reinforcing rib cavity 16, and the reinforcing rib 105 is suitable for controlling the connection strength between the left and right sides and the upper and lower sides of the workpiece 100, and controlling the flow rate of the plastic raw material in the cavity. The reinforcing rib 105 can control the connection strength between the left and right sides and the upper and lower sides of the workpiece 100, and can also serve as a buffer cavity to avoid flash caused by too fast injection flow rate, store a part of the plastic raw material, and also play a role in facilitating exhaust.

[0056] Further preferably, Fig.15 and Fig.16 As shown, a water cavity 14 is provided in the movable mold core 1, and the movable core 12 and the base mold core 11 jointly define the water cavity 14, and the water cavity 14 is connected to the mold cavity. The plastic raw material is suitable for passing through the water cavity 14 and entering the mold cavity. The water cavity 14 includes a plane inner wall 141 and a curved inner wall 142. The plane inner wall 141 is arranged on the base mold core 11, and the curved inner wall 142 is arranged on the movable core 12. The water cavity 14 is suitable for forming the water cavity 104. The plane inner wall 141 and the curved inner wall 142 are provided to increase the ability of the water cavity 14 to accommodate cold materials and effectively reduce the impact. In addition, the plane inner wall 141 is provided on the base mold core 11, and the curved inner wall 142 is provided on the movable core 12. Since the movable core 12 is movable, it is convenient to separate the curved inner wall 142 from the forming water cavity 104, and it is convenient for the ejection component 31 to act on the workpiece 100, thereby ejecting the entire workpiece 100, avoiding the problem that the adhesion between the water cavity 104 and the base mold core 11 is too large, causing difficulty in separation.

[0057] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A core assembly of an injection mold, the core assembly being suitable for molding a workpiece having a receiving groove and a rotating shaft seat, characterized in that: The opening of the accommodating groove is arranged backward, and the opening of the rotating shaft seat is arranged forward. The core assembly includes a fixed mold core and a movable mold core. The movable mold core is arranged on the front mold, and the fixed mold core is arranged on the rear mold. The outer wall of the fixed mold core is suitable for defining the inner wall of the accommodating groove. The movable mold core has multiple groups and is movably connected to the mold. When the mold is closed, the multiple groups of movable mold cores are suitable for combining with each other to define the outer and inner walls of the cavity.

2. A core assembly of an injection mold according to claim 1, characterized in that: The movable mold core includes a base mold core and a movable core, the base mold core is fixedly installed on the front mold, the movable core has multiple groups and is relatively arranged on the circumference of the base mold core, the movable core is movably connected to the front mold, when the mold is closed, the movable core and the base mold core are suitable for cooperating with each other and defining the outer and inner walls of the cavity, the movable core and the base mold core jointly define the rotating shaft seat cavity, and the rotating shaft seat cavity is suitable for forming the rotating shaft seat.

3. A core assembly of an injection mold according to claim 2, characterized in that: The shaft seat is provided with a shaft groove suitable for accommodating the shaft, the shaft groove extends in the up-down direction, and the notch of the shaft groove is arranged forward, the shaft seat includes a necking seat, the neck of the shaft groove shrinks inward to form the necking seat, the movable core includes a locking mold core and a hydraulic mold core, the locking mold core has two groups and is respectively arranged on the left and right sides of the base mold core, the hydraulic mold core has two groups and is respectively arranged on the upper and lower sides of the base mold core, the base mold core and the locking mold core jointly define a necking cavity, and a necking protrusion is provided on the hydraulic mold core in the up-down direction, and the necking protrusion is suitable for invading the necking cavity and cooperating to form the necking seat.

4. A core assembly of an injection mold according to claim 3, characterized in that: The rotating shaft seat comprises an expanding seat, the neck of the rotating shaft groove expands outward or remains unchanged to form the expanding seat, the base mold core and the locking mold core jointly define an expanding cavity, and the expanding cavity is suitable for forming the expanding seat.

5. A core assembly of an injection mold according to claim 3, characterized in that: The rear mold is provided with a locking rod protruding forward along the front-to-back direction, and the locking mold core is provided with a driving hole matching the locking rod, and the locking rod is suitable for being inserted into the driving hole. When the mold is opened, the rear mold moves backward and drives the locking rod to move backward, thereby driving the locking mold cores on the left and right sides to move toward the left and right sides respectively, thereby realizing the separation of the locking mold core from the inner bucket of the glove box; the mold also includes a hydraulic driving source, and under the action of the hydraulic driving source, the hydraulic mold core moves along the upper and lower sides respectively, and realizes the separation of the hydraulic mold core from the inner bucket of the glove box.

6. A core assembly of an injection mold according to claim 2, characterized in that: The movable core includes a locking mold core and a hydraulic mold core. The locking mold core has two groups and is respectively arranged on the left and right sides of the base mold core. The hydraulic mold core has two groups and is respectively arranged on the upper and lower sides of the base mold core. A buffer surface is provided on the base mold core. The buffer surface has an angle α with the opening and closing direction of the mold, satisfying 0°<α≤90°, and the buffer surface is suitable for cooperating with the fixed mold core and forming the bottom of the accommodating groove.

7. A core assembly of an injection mold according to claim 6, characterized in that: A buckle cavity is also provided in the movable mold core, and the buckle cavity is suitable for forming a buckle part provided on the same side of the rotating shaft seat. The base mold core and the locking mold core are suitable for jointly defining the buckle cavity, and the buckle part is suitable for movably connecting the inner bucket of the glove box and the glove box, and controlling the flow speed of the plastic raw material in the cavity.

8. A core assembly of an injection mold according to claim 6, characterized in that: At least one reinforcement part is respectively provided on the outside of the upper and lower sides of the inner bucket of the glove box, and a reinforcement cavity suitable for molding the reinforcement part is provided in the movable mold core. The locking mold core and the hydraulic mold core are suitable for jointly defining the reinforcement cavity. The reinforcement part is suitable for controlling the connection strength between the left and right sides and the upper and lower sides of the inner bucket of the glove box, and controlling the flow speed of the plastic raw material in the cavity.

9. A core assembly of an injection mold according to claim 6, characterized in that: A water cavity is arranged in the movable mold core, the movable core and the base mold core jointly define the water cavity, and the water cavity is connected to the mold cavity, the plastic raw material is suitable for passing through the water cavity and entering the mold cavity, the water cavity includes a plane inner wall and a curved inner wall, the plane inner wall is arranged on the base mold core, and the curved inner wall is arranged on the movable core.

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