Injection mold and injection molding method

Abstract

The injection mold comprises a mold core assembly and an elastic connecting piece, the mold core assembly comprises a first mold core and a second mold core which are oppositely arranged, the first mold core and the second mold core jointly define a containing hole, the containing hole is used for containing a workpiece, and the mold core assembly is provided with a containing groove and an injection molding channel; the injection molding channel communicates with the containing hole, the containing hole is formed in the groove bottom of the containing groove and communicates with the containing groove, and the containing groove is used for containing a workpiece; the elastic connecting piece is connected with the first mold core and the second mold core and used for providing elastic force for the first mold core and the second mold core to be close to each other, so that the first mold core and the second mold core clamp a workpiece in the containing hole, and the workpiece is clamped by the elastic connecting piece under the action of external force. The first die core and the second die core can overcome the elastic force provided by the elastic connecting piece to be away from each other so as to broach the containing hole, and therefore a workpiece can enter the containing hole conveniently. The workpiece feeding device can improve the workpiece feeding efficiency.

Description

Technical Field

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

[0002] With the development of the times, the popularity of mobile devices has made the competition in the manufacturing industry increasingly fierce. Among them, the card tray push rod in mobile phone electronic products is mainly composed of a cylindrical workpiece and some liquid silicone parts. Due to the relatively small volume of the workpiece, in the related technology, when placing the workpiece in the receiving hole of the injection mold, the staff often needs to use tweezers to manually clamp and place it. Correspondingly, the loading process of the workpiece in the injection mold is relatively cumbersome and difficult to meet production needs. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first aspect of the present invention provides an injection mold for improving the efficiency of workpiece feeding.

[0004] The second aspect of the present invention further provides an injection molding method.

[0005] An injection mold according to an embodiment of the first aspect of the present invention includes a mold core assembly and an elastic connecting member, the mold core assembly includes a first mold core and a second mold core that are relatively arranged, the first mold core and the second mold core jointly define a receiving hole, the receiving hole is used to place a workpiece, the mold core assembly is provided with a receiving groove and an injection channel, the injection channel is connected to the receiving hole, the receiving hole is provided at the bottom of the receiving groove and is connected to the receiving groove, the receiving groove is used to receive the workpiece; the elastic connecting member is respectively connected to the first mold core and the second mold core, the elastic connecting member is used to provide an elastic force for the first mold core and the second mold core to approach each other, so that the first mold core and the second mold core clamp the workpiece in the receiving hole, and under the action of external force, the first mold core and the second mold core can overcome the elastic force provided by the elastic connecting member to move away from each other, so as to expand the receiving hole, so as to facilitate the workpiece to enter the receiving hole.

[0006] An injection mold according to an embodiment of the first aspect of the present invention has at least the following technical effects:

[0007] During the use of the injection mold of the present application, the workpiece is placed in the receiving groove, and the staff applies external force to the first mold core and the second mold core so that the first mold core and the second mold core can overcome the elastic force of the elastic connecting member to move away from each other so that the aperture of the receiving hole is increased, and then by shaking the mold core assembly, the workpiece in the receiving groove can be smoothly entered into the receiving hole. When the workpiece is completely accommodated in the receiving hole, the external force applied to the first mold core and the second mold core is removed. Under the elastic force of the elastic connecting member, the first mold core and the second mold core are close to each other so that the aperture of the receiving hole is reduced. The first mold core and the second mold core can clamp the workpiece in the receiving hole, and then liquid silicone is injected into the receiving hole through the injection channel to form a silicone ring on the circumference of the workpiece, thereby completing the injection molding of the workpiece. It can be clearly known from the use of the above-mentioned injection mold that in the injection mold of the present application, after the staff places the workpiece in the receiving groove, by driving the first mold core and the second mold core to separate from each other and shaking the mold core assembly, the workpiece in the receiving groove can be automatically loaded into the receiving hole. For workpieces of small sizes, the staff does not need to clamp the workpieces one by one and place them in the receiving hole. The loading process of the workpiece in the receiving hole is simpler and more convenient, which improves the loading efficiency of the workpiece in the mold core assembly.

[0008] According to an injection mold of an embodiment of the first aspect of the present invention, the injection mold further includes a clamping block. A groove is formed between the first mold core and the second mold core. Under the action of external force, the clamping block can be inserted into the groove to push the first mold core and the second mold core away from each other.

[0009] According to an embodiment of the first aspect of the present invention, an injection mold further includes a mold base, on which a heating structure is provided, and a mold core assembly is detachably provided on the mold base.

[0010] According to an injection mold of an embodiment of the first aspect of the present invention, a slide groove is arranged on the mold base, and the mold core assembly is slidably arranged in the slide groove.

[0011] According to an injection mold of an embodiment of the first aspect of the present invention, a groove wall of the sliding groove is provided with a first protrusion, and the first protrusion is slidably arranged in the accommodating groove.

[0012] According to an injection mold of an embodiment of the first aspect of the present invention, the mold base includes a base body, a first limit member and a second limit member, the first limit member and the second limit member are both detachably arranged on the base body, a slide groove is formed between the first limit member and the second limit member, and a first protrusion is provided at one end of the first limit member close to the slide groove.

[0013] According to an injection mold of an embodiment of the first aspect of the present invention, a first thermal insulation member is provided on the first mold core, a second thermal insulation member is provided on the second mold core, and an elastic connecting member is detachably connected to the first thermal insulation member and the second thermal insulation member respectively.

[0014] An injection molding method according to a second aspect of an embodiment of the present invention, applied to the injection mold as in the above embodiment, comprises the following steps:

[0015] Placing a plurality of workpieces in the receiving groove;

[0016] Applying external force to the first mold core and the second mold core, so that the first mold core and the second mold core overcome the elastic force of the elastic connecting member to move away from each other, and completing the expansion of the receiving hole;

[0017] Shake the mold core assembly so that the workpiece in the receiving groove falls completely into the receiving hole;

[0018] The external force applied to the first mold core and the second mold core is cancelled, so that the first mold core and the second mold core are moved closer to each other under the elastic force of the elastic connecting member, and the shrinkage of the receiving hole is completed to clamp the workpiece in the receiving hole.

[0019] According to an injection molding method of an embodiment of the second aspect of the present invention, the injection mold further includes a squeeze block, and a groove is formed between the first mold core and the second mold core; applying external force to the first mold core and the second mold core includes the following steps:

[0020] The mold core assembly and the squeeze block are driven to approach each other so that the squeeze block is inserted into the groove, so that the first mold core and the second mold core are moved away from each other under the inner support of the squeeze block.

[0021] According to an injection molding method of an embodiment of the second aspect of the present invention, the injection mold further includes a mold base; the injection molding method further includes the following steps:

[0022] Install the mold core assembly loaded with the workpiece on the mold base;

[0023] Injecting the injection liquid into the injection channel to complete the injection molding of the workpiece;

[0024] Remove the mold core assembly from the mold base;

[0025] Remove the molded workpiece from the mold assembly.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 This is a schematic structural diagram of an injection mold according to one embodiment of the present invention;

[0029] Figure 2 for Figure 1A schematic diagram of the structure of the mold core assembly;

[0030] Figure 3 for Figure 2 A local enlarged view of the region shown in A;

[0031] Figure 4 for Figure 2 A structural diagram of the mold core component from another perspective;

[0032] Figure 5 for Figure 1 A schematic diagram of the structure of the injection mold with a core component removed;

[0033] Figure 6 FIG. 4 is a flow chart of an injection molding method according to one embodiment of the present invention.

[0034] Reference numerals:

[0035] The mold core assembly 100, the receiving hole 100a, the receiving groove 100b, the injection channel 100c, the groove 100d, the first mold core 110, the first heat insulating member 111, the second mold core 120, and the second heat insulating member 121;

[0036] The mold base 200 , the slide groove 200 a , the first protrusion 200 b , the base body 210 , the first position-limiting member 220 , and the second position-limiting member 230 . DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] In the related art, the injection mold includes an upper mold and a lower mold, the lower mold is provided with a heating structure, and the lower mold is provided with a plurality of positioning grooves. For the injection molding of small-sized workpieces, the staff needs to use tweezers and other tools to clamp the workpieces one by one and load them onto the lower mold, and then close the upper mold and the lower mold to complete the injection molding of the workpiece. Since the workpieces need to be clamped and loaded one by one by the staff using tweezers, on the one hand, the loading efficiency of the workpieces is low, and on the other hand, the heating time of the workpieces loaded into the lower mold first is longer. Accordingly, the size difference of the workpieces loaded into the lower mold first due to thermal expansion is greater, which leads to certain differences in the size of each workpiece, affecting the quality of the finished parts after the subsequent injection molding is completed.

[0042] Reference below Figures 1 to 5 An injection mold according to an embodiment of the first aspect of the present invention is described in detail.

[0043] refer to Figures 1 to 3 According to an embodiment of the first aspect of the present invention, an injection mold comprises a mold core assembly 100 and an elastic connector. The mold core assembly 100 comprises a first mold core 110 and a second mold core 120 which are arranged opposite to each other. The first mold core 110 and the second mold core 120 define a receiving hole 100a together. The receiving hole 100a is used to place a workpiece. The mold core assembly 100 is provided with a receiving groove 100b and an injection channel 100c. The injection channel 100c is connected to the receiving hole 100a. The receiving hole 100a is provided at the bottom of the receiving groove 100b and is located at the bottom of the receiving groove 100b. 100b is connected, and the receiving groove 100b is used to receive the workpiece; the elastic connecting member is respectively connected to the first mold core 110 and the second mold core 120, and the elastic connecting member is used to provide the first mold core 110 and the second mold core 120 with an elastic force to approach each other, so that the first mold core 110 and the second mold core 120 clamp the workpiece in the receiving hole 100a. Under the action of external force, the first mold core 110 and the second mold core 120 can overcome the elastic force provided by the elastic connecting member to move away from each other, so as to expand the receiving hole 100a, so as to facilitate the workpiece to enter the receiving hole 100a.

[0044] During the use of the injection mold of the present application, the workpiece is placed in the receiving groove 100b, and the staff applies external force to the first mold core 110 and the second mold core 120 so that the first mold core 110 and the second mold core 120 can overcome the elastic force of the elastic connector to move away from each other, so that the aperture of the receiving hole 100a is increased, and then by shaking the mold core assembly 100, the workpiece in the receiving groove 100b can be smoothly entered into the receiving hole 100a. When the workpiece is completely accommodated in the receiving hole 100a, the external force applied to the first mold core 110 and the second mold core 120 is removed. Under the elastic force of the elastic connector, the first mold core 110 and the second mold core 120 are close to each other, so that the aperture of the receiving hole 100a is reduced. The first mold core 110 and the second mold core 120 can clamp the workpiece in the receiving hole 100a, and then liquid silicone is injected into the receiving hole 100a through the injection channel 100c to form a silicone ring on the circumference of the workpiece, thereby completing the injection molding of the workpiece. It can be clearly known from the use of the above-mentioned injection mold that in the injection mold of the present application, after the staff places the workpiece in the receiving groove 100b, by driving the first mold core 110 and the second mold core 120 to separate from each other and shaking the mold core assembly 100, the workpiece in the receiving groove 100b can be automatically loaded into the receiving hole 100a. For workpieces of small sizes, the staff does not need to clamp the workpieces one by one and place them in the receiving hole 100a. The loading process of the workpiece in the receiving hole 100a is simpler and more convenient, thereby improving the loading efficiency of the workpiece in the mold core assembly 100.

[0045] It can be understood that, in the process of shaking the workpiece, the groove walls on both sides of the receiving groove 100b can reduce the possibility of the workpiece escaping from the receiving groove 100b, thereby increasing the possibility of the workpiece falling into the receiving hole 100a.

[0046] refer to Figure 4 In some embodiments of the present invention, the injection mold further includes a squeeze block, and a groove 100d is formed between the first mold core 110 and the second mold core 120. Under the action of external force, the squeeze block can be inserted into the groove 100d to push the first mold core 110 and the second mold core 120 away from each other. It is understandable that the staff can drive the injection mold close to the squeeze block and insert the squeeze block into the groove 100d. At this time, the first mold core 110 and the second mold core 120 can move away from each other under the internal support of the squeeze block, so that the aperture of the receiving hole 100a is increased, and the workpiece in the receiving groove 100b can enter the receiving hole 100a more easily.

[0047] In a further embodiment of the present invention, the squeezing block is a wedge-shaped block. When the wedge-shaped block is inserted into the groove 100d, two opposite inclined surfaces on the wedge-shaped block can respectively push the first mold core 110 and the second mold core 120 to separate from each other.

[0048] In some embodiments of the present invention, a plurality of accommodating holes 100a communicating with the accommodating groove 100b are disposed at the bottom of the accommodating groove 100b.

[0049] It can be understood that since the bottom of the receiving groove 100b is provided with multiple receiving holes 100a connected to the receiving groove 100b, after the staff separates the first mold core 110 and the second mold core 120 from each other to complete the expansion of the receiving hole 100a, the staff can shake the mold core assembly 100 so that the multiple workpieces in the receiving groove 100b can be respectively accommodated in each receiving hole 100a, thereby completing the loading of the workpieces in the multiple receiving holes 100a at one time.

[0050] It should be noted that after the workpiece is loaded into the receiving hole 100a in the mold core assembly 100, it is necessary to perform injection molding on the workpiece in the receiving hole 100a, and during the injection molding process, the workpiece needs to be kept heated.

[0051] refer to Figure 1 and Figure 5 In some embodiments of the present invention, the injection mold further includes a mold base 200 , on which a heating structure is disposed, and the mold core assembly 100 is detachably disposed on the mold base 200 .

[0052] It can be understood that since the heating structure is arranged on the mold base 200, and the mold core assembly 100 is detachably arranged on the mold base 200, after the mold core assembly 100 is loaded with each workpiece, the mold core assembly 100 can be installed on the mold base 200, so that the various workpieces in the mold core assembly 100 can start to be heated at the same time, the difference in heating time of each workpiece on the mold core assembly 100 is smaller, and the size difference between each workpiece is smaller. After completing the injection molding of each workpiece on the mold core assembly 100, the quality of the finished product formed is higher.

[0053] like Figure 3 and Figure 4 As shown, in some embodiments, a slide groove 200a is provided on the mold base 200, and the mold core assembly 100 is slidably disposed in the slide groove 200a. It can be understood that by slidably disposing the mold core assembly 100 in the slide groove 200a, the mold core assembly 100 can be moved along the slide groove 200a to a preset position on the mold base 200, which is convenient for the installation of the mold core assembly 100 on the mold base 200 on the one hand, and is convenient for reducing the possibility of positional deviation of the mold core assembly 100 relative to the mold base 200 during the movement.

[0054] like Figure 5 As shown, in some embodiments, a groove wall of the sliding groove 200a is provided with a first protrusion 200b, and the first protrusion 200b is slidably disposed in the receiving groove 100b.

[0055] It can be understood that, in the process of the mold core assembly 100 sliding along the slide groove 200a relative to the mold base 200, the first protrusion 200b can be inserted into the receiving groove 100b. At this time, under the limiting obstruction of the first protrusion 200b, the probability of the mold core assembly 100 disengaging from the slide groove 200a can be reduced, so as to further reduce the probability of the mold core assembly 100 being positionally offset relative to the mold base 200; at the same time, since the first protrusion 200b is inserted into the receiving groove 100b, after the mold core assembly 100 is installed on the mold base 200, the first protrusion 200b can close the orifice of the receiving hole 100a, so as to reduce the probability of the workpiece in the receiving hole 100a automatically disengaging from the receiving hole 100a during the injection molding process.

[0056] like Figure 5 As shown, in one embodiment, the mold base 200 includes a base body 210, a first stopper 220 and a second stopper 230, the first stopper 220 and the second stopper 230 are both detachably arranged on the base body 210, a slide groove 200a is formed between the first stopper 220 and the second stopper 230, and a first protrusion 200b is arranged at one end of the first stopper 220 close to the slide groove 200a. It can be understood that for mold core assemblies 100 of different specifications, the staff can adjust the width of the slide groove 200a between the first stopper 220 and the second stopper 230 by replacing the first stopper 220 and the second stopper 230 of different sizes, so that mold core assemblies 100 of different sizes can be installed on the mold base 200, thereby improving the versatility of the mold base 200.

[0057] refer to Figure 1 In some embodiments of the present invention, a first heat insulating member 111 is provided on the first mold core 110, a second heat insulating member 121 is provided on the second mold core 120, and the elastic connecting member is detachably connected to the first heat insulating member 111 and the second heat insulating member 121, respectively. It can be understood that by connecting the elastic connecting member to the first heat insulating member 111 and the second heat insulating member 121, the possibility of damage to the elastic connecting member due to heating can be reduced; by providing the first heat insulating member 111 and the second heat insulating member 121 on the first mold core 110 and the second mold core 120, respectively, it is convenient for the staff to place the mold core assembly 100 on the mold base 200 or remove it from the mold base 200.

[0058] In a further embodiment of the present invention, the first thermal insulation member 111 is threadedly connected to the first mold core 110 , and the second thermal insulation member 121 is threadedly connected to the second mold core 120 .

[0059] The following references Figure 6 An injection molding method according to an embodiment of the second aspect of the present invention is described in detail.

[0060] refer to Figure 6According to an injection molding method of an embodiment of the second aspect of the present invention, applied to the injection mold as in the above embodiment, specifically comprises the following steps:

[0061] Step S100, placing a plurality of workpieces in the receiving groove 100b;

[0062] Step S200, applying external force to the first mold core 110 and the second mold core 120, so that the first mold core 110 and the second mold core 120 overcome the elastic force of the elastic connecting member to move away from each other, and complete the expansion of the receiving hole 100a;

[0063] Step S300, shaking the mold core assembly 100, so that the workpiece in the receiving groove 100b completely falls into the receiving hole 100a;

[0064] Step S400, cancel the external force applied to the first mold core 110 and the second mold core 120, so that the first mold core 110 and the second mold core 120 are close to each other under the elastic force of the elastic connecting member, and the shrinkage of the receiving hole 100a is completed to clamp the workpiece in the receiving hole 100a.

[0065] It can be understood that the staff places the workpiece in the receiving groove 100b, and then applies external force to the first mold core 110 and the second mold core 120 so that the first mold core 110 and the second mold core 120 overcome the elastic force of the elastic connector to move away from each other, and the aperture of the receiving hole 100a increases. Then, by shaking the mold core assembly 100, the workpiece in the receiving groove 100b can be smoothly entered into the receiving hole 100a. When the workpiece is completely accommodated in the receiving hole 100a, the external force applied to the first mold core 110 and the second mold core 120 is removed. Under the elastic force of the elastic connector, the first mold core 110 and the second mold core 120 approach each other to reduce the aperture of the receiving hole 100a. The first mold core 110 and the second mold core 120 can clamp the workpiece in the receiving hole 100a, and then injection molding is performed into the receiving hole 100a through the injection channel 100c to achieve injection molding of the workpiece.

[0066] It can be understood that after completing the expansion of the receiving hole 100a, by shaking the mold core assembly 100, the workpiece in the receiving groove 100b can be automatically dropped into each receiving hole 100a, so as to complete the loading of the workpiece in each receiving hole 100a. There is no need for the workpiece personnel to clamp the workpiece one by one and load it into each receiving hole 100a. The loading speed of the workpiece in the mold core assembly 100 is faster, which reduces the workload of the staff.

[0067] In some embodiments of the present invention, the injection mold further includes a squeeze block, and a groove 100d is formed between the first mold core 110 and the second mold core 120; step S200 includes the following steps:

[0068] Step S210, driving the mold core assembly 100 and the squeezing block to approach each other, so that the squeezing block is inserted into the groove 100d, so that the first mold core 110 and the second mold core 120 are moved away from each other under the inner support of the squeezing block.

[0069] It is understandable that the staff can drive the mold core assembly 100 close to the squeezing block so that the squeezing block is inserted into the groove 100d of the mold core assembly 100, thereby making the first mold core 110 and the second mold core 120 move away from each other under the internal support of the squeezing block. At this time, the aperture of the accommodating hole 100a is increased, and the workpiece can fall into the accommodating hole 100a more smoothly.

[0070] refer to Figure 6 In some embodiments of the present invention, the injection mold further includes a mold base 200; and the injection molding method further includes the following steps:

[0071] Step S500, installing the mold core assembly 100 loaded with the workpiece on the mold base 200;

[0072] Step S600, injecting injection liquid into the injection channel 100c to complete the injection molding of the workpiece;

[0073] Step S700, removing the mold core assembly 100 from the mold base 200;

[0074] Step S800 , taking out the workpiece after injection molding from the mold core assembly 100 .

[0075] It should be noted that a heating structure is installed on the mold base 200. After the mold core assembly 100 is installed on the mold base 200, the mold base 200 can synchronously heat each workpiece in the mold core assembly 100, so that the heating time of each workpiece in the mold core assembly 100 is basically the same, so as to reduce the dimensional difference between the workpieces caused by thermal expansion and contraction.

[0076] It can be understood that the mold core assembly 100 loaded with the workpiece is placed on the mold base 200, and then the injection liquid is input into the injection channel 100c so that the injection liquid flows into the receiving hole 100a, so as to form an injection molded part on the peripheral surface of the workpiece in the receiving hole 100a, and then the mold core assembly 100 is removed from the mold base 200, and the injection molded workpiece is taken out from the mold core assembly 100.

[0077] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An injection mold, characterized in that: include: A mold core assembly, the mold core assembly includes a first mold core and a second mold core that are arranged opposite to each other, the first mold core and the second mold core jointly define a receiving hole, the receiving hole is used to place a workpiece, the mold core assembly is provided with a receiving groove and an injection channel, the injection channel is communicated with the receiving hole, the receiving hole is provided at the bottom of the receiving groove and is communicated with the receiving groove, and the receiving groove is used to receive the workpiece; An elastic connector, wherein the elastic connector is respectively connected to the first mold core and the second mold core, and the elastic connector is used to provide an elastic force for bringing the first mold core and the second mold core closer to each other, so that the first mold core and the second mold core clamp the workpiece in the receiving hole. Under the action of an external force, the first mold core and the second mold core can overcome the elastic force provided by the elastic connector and move away from each other to expand the receiving hole, so as to facilitate the workpiece to enter the receiving hole.

2. An injection mold according to claim 1, characterized in that: It also includes a squeezing block, and a groove is formed between the first mold core and the second mold core. Under the action of external force, the squeezing block can be inserted into the groove to push the first mold core and the second mold core away from each other.

3. An injection mold according to claim 1, characterized in that: It also includes a mold base, on which a heating structure is provided, and the mold core assembly is detachably arranged on the mold base.

4. An injection mold according to claim 3, characterized in that: The mold base is provided with a slide groove, and the mold core assembly can be slidably arranged in the slide groove.

5. An injection mold according to claim 4, characterized in that: The groove wall of the sliding groove is provided with a first protrusion, and the first protrusion is slidably arranged in the accommodating groove.

6. An injection mold according to claim 5, characterized in that: The mold base includes a base body, a first limit member and a second limit member. The first limit member and the second limit member are both detachably arranged on the base body. The slide groove is formed between the first limit member and the second limit member. The first protrusion is provided at one end of the first limit member close to the slide groove.

7. The injection mold according to claim 3, characterized in that: The first mold core is provided with a first thermal insulation member, the second mold core is provided with a second thermal insulation member, and the elastic connecting member is detachably connected to the first thermal insulation member and the second thermal insulation member respectively.

8. An injection molding method, characterized in that: The injection mold according to any one of claims 1 to 7 comprises the following steps: Placing a plurality of workpieces in the receiving groove; Applying external force to the first mold core and the second mold core, so that the first mold core and the second mold core overcome the elastic force of the elastic connecting member to move away from each other, and completing the expansion of the receiving hole; Shaking the mold core assembly so that the workpiece in the receiving groove completely falls into the receiving hole; The external force applied to the first mold core and the second mold core is cancelled, so that the first mold core and the second mold core are moved closer to each other under the elastic force of the elastic connecting member, and the shrinkage of the receiving hole is completed to clamp the workpiece in the receiving hole.

9. An injection molding method according to claim 8, characterized in that: The injection mold further includes a squeeze block, and a groove is formed between the first mold core and the second mold core; applying an external force to the first mold core and the second mold core includes the following steps: The mold core assembly and the squeezing block are driven to approach each other so that the squeezing block is inserted into the groove, so that the first mold core and the second mold core are moved away from each other under the inner support of the squeezing block.

10. An injection molding method according to claim 8, characterized in that: The injection mold also includes a mold base; the injection molding method also includes the following steps: Installing the mold core assembly loaded with the workpiece on the mold base; Inputting injection liquid into the injection channel to complete the injection molding of the workpiece; Remove the mold core assembly from the mold base; The workpiece after injection molding is taken out from the mold core assembly.

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