Sound net injection molding part injection molding process and forming mold thereof

Abstract

The invention discloses a sound net injection molding part injection molding process and a forming mold thereof, and belongs to the technical field of injection molds, the sound net injection molding part injection molding mold comprises a base plate, a female mold, a male mold and an automatic locking mechanism; the automatic locking mechanism comprises a female mold locking assembly and a male mold locking assembly, an automatic unlocking mechanism is arranged at the upper end of the support, and a locking test mechanism is arranged at the lower end of the support. According to the mode, separate injection molding of the inner injection molding part and the outer injection molding part is achieved through cooperation of first-injection injection molding and second-injection injection molding, the finished product of the sound king injection molding part is obtained, the injection molding efficiency is effectively improved, and the overall quality of the injection molding product is improved; the quick locking effect on the female mold and the male mold can be achieved through cooperation of the female mold locking assembly and the male mold locking assembly, and quick unlocking of the female mold and the male mold can be achieved through the automatic unlocking mechanism, so that locking and unlocking operation of the female mold and the male mold is convenient and quick, the mold closing locking effect of the female mold and the male mold is guaranteed, and the rate of finished products is effectively increased.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to an injection molding process for a sound network injection molded part and a molding mold thereof. Background Art

[0002] Sound net injection molding is often used in sound-generating structures to block dust and leak out the sound channel.

[0003] like Figure 8 and Fig. 9 As shown, the sound net injection molded parts are usually composed of a sound net, an inner injection molded part and an outer injection molded part. Each component is molded separately and then reassembled, which has low production efficiency, long cycle and high cost. It is difficult to mold the whole part in one time, and the inner and outer injection molded parts are prone to defects such as burrs, cracks or bubbles during the molding process.

[0004] Based on this, the present invention designs an injection molding process for a sound network injection molded part and a molding mold thereof to solve the above problems. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an injection molding process for a sound network injection molded part and a molding mold thereof.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A sound network injection molding process, comprising the following steps:

[0008] Step 1: The raw materials for internal injection molding are subjected to material quality control, storage and drying operations in sequence, and the raw materials for internal injection molding are added into the barrel of the injection molding machine for one shot to be melted, and the melting temperature is 385℃-395℃; the raw materials for sound nets are subjected to material quality control and storage operations, and the raw materials for sound nets are cut and formed into sound nets, and then implanted into the one-shot molding mold of the injection molding machine;

[0009] Step 2: The first shot mold is closed and the injection molding machine is started to squeeze the molten material of the inner injection mold into the first shot mold. The extrusion force is 1600-2200kgf / cm 3 , the holding time is 0.8s, the inner injection molded part is formed, the one-shot molding operation of the sound net injection molded part is completed, and the one-shot molded finished product is ejected;

[0010] Step 3: Load the one-shot molding finished product through the vibration plate, transfer the one-shot molding finished product through the robot, perform appearance inspection on the one-shot molding finished product through the CCD component, automatically load the qualified one-shot molding finished product onto the plate, perform appearance re-inspection on the one-shot molding finished product manually, and put the qualified one-shot molding finished product into the warehouse;

[0011] Step 4: Perform incoming material quality control and warehousing operations on the raw materials for external injection molding parts. Inject the raw materials for external injection molding parts into the barrel of the injection molding machine for the second shot and melt them at a melting temperature of 15-20°C; implant the finished product of the first shot into the second shot molding mold.

[0012] Step 5: The two-shot molding mold is closed and the molding cavity is preheated by a high-frequency preheating machine;

[0013] Step 6: Start to squeeze the molten outer injection molding material into the two-shot molding mold, the extrusion force is 230-280Bar, the holding time is 3.0s, the outer injection molding material is molded, and the two-shot molding operation of the sound network injection molding part is completed;

[0014] Step 7: Separate the two-shot mold, take out the sprue, eject the sound net injection molded part and clean the mold surface;

[0015] Step 8: The sound net injection molded parts are divided into holes and placed on trays, and then put into storage after cleaning, drying and appearance inspection.

[0016] In order to better achieve the purpose of the present invention, the present invention also provides a molding die thereof, comprising a base plate, a female die, a male die and an automatic locking mechanism;

[0017] The base plate is fixedly provided with a support leg, the top of the support leg is fixedly provided with a support seat, a female mold and a male mold are arranged at the upper end of the support seat, and the female mold and the male mold cooperate to form an injection molded part;

[0018] The automatic locking mechanism comprises a female mold locking component and a male mold locking component. The female mold is provided with a female mold locking component, and the male mold is provided with a male mold locking component. The female mold locking component and the male mold locking component cooperate to lock the female mold on the male mold.

[0019] The upper end of the support is provided with an automatic unlocking mechanism for controlling the unlocking of the female mold locking assembly and the male mold locking assembly, and the lower end of the support is also provided with a locking test mechanism for testing and judging whether the female mold locking assembly and the male mold locking assembly are locked.

[0020] Furthermore, the mother mold locking assembly includes a baffle and a second spring, and the mother mold is symmetrically provided with sliding grooves on the front and rear sides, and a baffle connected to the sliding groove for limiting sliding is arranged in the sliding groove; an H-shaped groove is opened in the middle of the baffle, and the second spring is arranged in the H-shaped groove; an accommodating groove is opened in the mother mold, and the second spring is located in the accommodating groove and the H-shaped groove.

[0021] Furthermore, the male mold locking assembly includes a locking rod and a third spring. Locking rods connected to the baffle bars are provided on the left and right sides of each baffle bar, and the locking rods are slidably connected to the male mold. A receiving groove is provided in the male mold, and the third spring is located in the receiving groove. A protrusion that is slidably connected to the inner wall of the receiving groove is provided at the lower end of the locking rod; and the two ends of the third spring are respectively abutted against the top of the receiving groove and the upper end of the protrusion.

[0022] Furthermore, the blocking bar is provided with a locking groove corresponding to the locking rod and used for locking with the locking rod, and the upper end of the locking rod is provided with a clamping groove that cooperates with the locking groove to lock; the top end of the locking rod adopts a ball head structure.

[0023] Furthermore, the locking test mechanism includes a top cylinder, a top plate and a top rod. The top cylinder is fixedly installed at the lower end of the support, and the output end of the top cylinder is fixedly installed with a top plate. Four top rods corresponding to the locking rods are fixedly installed on the top plate, and the top rods are used to push the locking rod upward.

[0024] Furthermore, the automatic unlocking mechanism includes a side-push unlocking assembly and a limit assembly arranged on the support, the limit assembly is used to limit the horizontal displacement of the side-push unlocking assembly, and the side-push unlocking assembly is used to push the baffle to control the locking state of the baffle and the locking rod.

[0025] Furthermore, the side-push unlocking assembly includes a first fixed seat, a transverse plate, a first spring, a connecting block, a handle and a push plate. The first fixed seat is fixedly connected to the support, and the transverse plate can be horizontally moved on the first fixed seat. The front and rear sides of the transverse plate away from one end of the male mold are symmetrically fixed with connecting blocks, and the first spring is fixedly installed between the connecting block and the first fixed seat; a push plate for pushing the baffle is fixedly installed on the other side of the transverse plate; and a handle for pulling the transverse plate is also fixedly installed on the transverse plate.

[0026] Furthermore, the limit assembly is provided with two groups and is symmetrically distributed on the front and rear sides of the first fixed seat, the limit assembly includes a second fixed seat, a limit groove, a stop block and a limit block, the two second fixed seats are fixedly connected to the support; a limit groove is opened on the side of the second fixed seat close to the first fixed seat, and two limit blocks that are slidably connected to the limit groove are fixedly installed on the side of the first fixed seat; the stop block is fixedly connected to the second fixed seat and is located between the two limit blocks.

[0027] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes separate injection molding of inner and outer injection molded parts and outer injection molded parts through the combination of one-shot injection molding and two-shot injection molding to obtain finished Yinwang injection molded parts, effectively improving the efficiency of injection molding and improving the overall quality of injection molded products.

[0028] 2. The present invention can achieve a quick locking effect on the female mold and the male mold by cooperating with the female mold locking component and the male mold locking component, and verify the mold locking effect of the female mold and the male mold through the locking test mechanism after the injection molding operation, thereby limiting the relative position between the female mold and the male mold to ensure the mold locking effect of the female mold and the male mold, effectively improving the yield rate, and the female mold and the male mold can be quickly unlocked by the automatic unlocking mechanism, making the locking and unlocking operations of the female mold and the male mold convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A three-dimensional molding die of the present invention Figure 1 ;

[0031] Figure 2 A front view of a forming die of the present invention;

[0032] Figure 3 A top view of a molding die of the present invention;

[0033] Figure 4 A three-dimensional molding die of the present invention Figure 2 ;

[0034] Figure 5 For along Figure 3 AA direction cross-sectional view;

[0035] Figure 6 for Figure 5 The enlarged view of point B in the middle;

[0036] Figure 7 A three-dimensional diagram of the automatic unlocking mechanism of the present invention;

[0037] Figure 8 Three-dimensional injection molding of the sound network Figure 1 ;

[0038] Fig. 9 Three-dimensional injection molding of the sound network Figure 2 .

[0039] The numbers in the figure represent:

[0040] 10. Base plate; 11. Leg; 12. Support; 2. Mother mold; 3. Male mold; 4. Automatic unlocking mechanism; 41. Side push unlocking assembly; 411. First fixed seat; 412. Transverse plate; 413. First spring; 414. Connecting block; 415. Handle; 416. Push plate; 42. Limiting assembly; 421. Second fixed seat; 422. Limiting groove; 423. Block; 424. Limiting block; 5. Automatic locking mechanism; 51. Block bar; 52. Second spring; 53. Locking rod; 54. Third spring; 55. Locking groove; 56. H-shaped groove; 57. Slide groove; 58. Card slot; 6. Locking test mechanism; 61. Top cylinder; 62. Top plate; 63. Top rod; 7. Sound net injection molded part; 71. Sound net; 72. Inner injection molded part; 73. Outer injection molded part. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The terms “left”, “right”, “front”, “back”, “up” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0043] Embodiment 1: In some embodiments, please refer to the drawings of the specification Figure 1-Figure 9 , a sound net injection molding process, comprising the following steps:

[0044] Step 1: The raw materials for the inner injection molded parts 72 are subjected to material quality control, storage and drying operations in sequence, and the raw materials for the inner injection molded parts 72 are added into the barrel of the injection molding machine for one shot and melted, and the melting temperature is 385°C-395°C; the raw materials for the sound net 71 are subjected to material quality control and storage operations, and the raw materials for the sound net 71 are cut and molded into the sound net 71, and then implanted into the one-shot molding mold of the injection molding machine;

[0045] Step 2: The first shot mold is closed, and the injection molding machine is started to squeeze the molten material of the inner injection molded part 72 into the first shot mold with an extrusion force of 1600-2200kgf / cm 3 , the holding time is 0.8s, the inner injection molded part 72 is formed, the one-shot molding operation of the sound net injection molded part 7 is completed, and the one-shot molded finished product is ejected;

[0046] Step 3: Load the one-shot molding finished product through the vibration plate, transfer the one-shot molding finished product through the robot, perform appearance inspection on the one-shot molding finished product through the CCD component, automatically load the qualified one-shot molding finished product onto the plate, perform appearance re-inspection on the one-shot molding finished product manually, and put the qualified one-shot molding finished product into the warehouse;

[0047] Step 4: Perform incoming material quality control and warehousing operations on the raw materials of the external injection molded parts 73, inject the raw materials of the external injection molded parts 73 into the barrel of the injection molding machine for the second shot and melt them, the melting temperature is 15-20°C; implant the finished product of the first shot into the second shot molding mold,

[0048] Step 5: The two-shot molding mold is closed and the molding cavity is preheated by a high-frequency preheating machine;

[0049] Step 6: Start to squeeze the molten outer injection molding part 73 raw material into the two-shot molding mold, the extrusion force is 230-280Bar, the holding time is 3.0s, the outer injection molding part 73 raw material is molded, and the two-shot molding operation of the sound network injection molding part 7 is completed;

[0050] Step 7: Separate the two-shot molding mold, take out the sprue, eject the sound net injection molded part 7 and clean the mold surface;

[0051] Step 8: Divide the sound net injection molded parts into 7 holes and place them on a tray. After cleaning, drying and appearance inspection, they are put into storage.

[0052] Embodiment 2: In some embodiments, Figure 1-Figure 9 As shown, as a preferred embodiment of the present invention, a molding die includes a base plate 10, a female die 2, a male die 3 and an automatic locking mechanism 5;

[0053] The base plate 10 is fixedly provided with a support leg 11, a support 12 is fixedly provided at the top of the support leg 11, a female mold 2 and a male mold 3 are arranged at the upper end of the support 12, and the female mold 2 and the male mold 3 cooperate to form an injection molded part;

[0054] The automatic locking mechanism 5 includes a female mold locking component and a male mold locking component. The female mold 2 is provided with a female mold locking component, and the male mold 3 is provided with a male mold locking component. The female mold locking component and the male mold locking component cooperate to lock the female mold 2 on the male mold 3.

[0055] The upper end of the support 12 is provided with an automatic unlocking mechanism 4 for controlling the unlocking of the female mold locking assembly and the male mold locking assembly, and the lower end of the support 12 is also provided with a locking test mechanism 6 for testing and judging whether the female mold locking assembly and the male mold locking assembly are locked.

[0056] In the present invention, after the female mold 2 is moved vertically downward to close the mold with the male mold 3, the female mold 2 and the male mold 3 are locked by the cooperation of the female mold locking assembly and the male mold locking assembly. After the injection molding is completed, the locking effect of the female mold 2 and the male mold 3 is judged by the locking test mechanism 6, and then the locking effect of the female mold locking assembly and the male mold locking assembly is released by the automatic unlocking mechanism 4 driven by a robot or manually, and then the female mold 2 is controlled to move up and separate the molds, and the finished product is ejected from the public mold 3, so as to realize the injection molding operation of the finished product.

[0057] The present invention can achieve a quick locking effect on the female mold 2 and the male mold 3 through the cooperation of the female mold locking component and the male mold locking component, and verify the mold locking effect of the female mold 2 and the male mold 3 through the locking test mechanism 6 after the injection molding operation, thereby limiting the relative position between the female mold 2 and the male mold 3 to ensure the mold locking effect of the female mold 2 and the male mold 3, effectively improving the yield rate, and the female mold 2 and the male mold 3 can be quickly unlocked through the automatic unlocking mechanism 4, so that the locking and unlocking operations of the female mold 2 and the male mold 3 are convenient and fast.

[0058] The mother mold locking assembly includes a stopper 51 and a second spring 52. The mother mold 2 is symmetrically provided with slide grooves 57 on both sides. The slide grooves 57 are provided with stopper 51 that is limitedly slidably connected with the slide grooves 57. The middle of the stopper 51 is provided with an H-shaped groove 56. The second spring 52 is provided in the H-shaped groove 56. The mother mold 2 is provided with a receiving groove. The second spring 52 is located in the receiving groove and the H-shaped groove 56.

[0059] The male mold locking assembly includes a locking rod 53 and a third spring 54. The left and right sides of each stop bar 51 are provided with a locking rod 53 that is locked and connected to the stop bar 51. The locking rod 53 is slidably connected to the male mold 3. A receiving groove is provided in the male mold 3, and the third spring 54 is located in the receiving groove. The lower end of the locking rod 53 is provided with a protrusion that is slidably connected to the inner wall of the receiving groove. The two ends of the third spring 54 are respectively abutted against the top of the receiving groove and the upper end of the protrusion.

[0060] The blocking bar 51 is provided with a locking groove 55 corresponding to the locking rod 53 and used for locking with the locking rod 53. The upper end of the locking rod 53 is provided with a locking groove 58 for locking with the locking groove 55. The top end of the locking rod 53 adopts a ball head structure.

[0061] In the present invention, when the female mold 2 moves down to close the mold, the right edge of the locking groove 55 of the baffle 51 contacts the ball head of the locking rod 53, and the ball head of the locking rod 53 pushes the baffle 51 to the right. After the female mold 2 and the male mold 3 are completely closed, the second spring 52 drives the baffle 51 to reset, so that the slot 58 of the locking rod 53 is engaged with the baffle 51, limiting the relative position between the female mold 2 and the male mold 3 in the horizontal direction, thereby achieving a quick locking effect on the female mold 2 and the male mold 3.

[0062] The locking test mechanism 6 includes a top cylinder 61, a top plate 62 and a top rod 63. The top cylinder 61 is fixedly installed at the lower end of the support 12. The top plate 62 is fixedly installed at the output end of the top cylinder 61. Four top rods 63 corresponding to the locking rods 53 are fixedly installed on the top plate 62. The top rods 63 are used to push the locking rod 53 upward.

[0063] In the present invention, the top plate 62 is driven to move upward by the top cylinder 61, so that the top rod 63 pushes the locking rod 53 upward. If the locking rod 53 is blocked by the second spring 52, it means that the female mold 2 and the male mold 3 are in a locked state; if the locking rod 53 moves upward smoothly, it means that the female mold 2 and the male mold 3 are in an unlocked state, and the mold separation operation of the female mold 2 and the male mold 3 can be carried out normally.

[0064] In some embodiments, Figure 7 As shown, as a preferred embodiment of the present invention, the automatic unlocking mechanism 4 includes a side push unlocking component 41 and a limit component 42 arranged on the support 12, the limit component 42 is used to limit the displacement of the side push unlocking component 41 in the horizontal direction, and the side push unlocking component 41 is used to push the blocking bar 51 to control the locking state of the blocking bar 51 and the locking rod 53;

[0065] The side-push unlocking assembly 41 includes a first fixed seat 411, a transverse plate 412, a first spring 413, a connecting block 414, a handle 415 and a push plate 416. The first fixed seat 411 is fixedly connected to the support 12, and the transverse plate 412 can be horizontally slidably arranged on the first fixed seat 411. The front and rear sides of the transverse plate 412 away from the end of the male mold 3 are symmetrically fixedly installed with connecting blocks 414, and the first spring 413 is fixedly installed between the connecting block 414 and the first fixed seat 411; a push plate 416 for pushing the baffle 51 is fixedly installed on the other side of the transverse plate 412; a handle 415 for pulling the transverse plate 412 is also fixedly installed on the transverse plate 412, and the handle 415 can be pulled manually or by a robot, such as a rotating cylinder, to control the horizontal movement of the transverse plate 412.

[0066] The limiting assembly 42 is provided with two groups and is symmetrically distributed on the front and rear sides of the first fixed seat 411. The limiting assembly 42 includes a second fixed seat 421, a limiting groove 422, a stopper 423 and a limiting block 424. The two second fixed seats 421 are fixedly connected to the support 12; a limiting groove 422 is provided on the side of the second fixed seat 421 close to the first fixed seat 411, and two limiting blocks 424 are fixedly installed on the side of the first fixed seat 411 and are limitedly slidably connected to the limiting groove 422; the stopper 423 is fixedly connected to the second fixed seat 421 and is located between the two limiting blocks 424, and the travel of the transverse plate 412 is controlled by the cooperation of the stopper 423 and the limiting block 424.

[0067] In the present invention, before the female mold 2 and the male mold 3 are molded together, the handle 415 is pulled to the left to make the push plate 416 avoid it. After the female mold 2 and the male mold 3 are molded together, the handle 415 is released, and the push plate 416 pushes the baffle 51 to the right under the action of the first spring 413, so that the left side of the locking groove 55 of the baffle 51 is engaged and locked with the slot 58 of the locking rod 53; after the injection molding is completed, the transverse plate 412 drives the push plate 416 to move left, and the baffle 51 moves left under the restoring force of the second spring 52, so that the baffle 51 and the locking rod 53 are unlocked, so that the female mold 2 and the male mold 3 can be separated from the mold smoothly.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sound network injection molding process, characterized in that: The following steps are involved: Step 1: The raw materials of the inner injection molded parts (72) are sequentially subjected to the quality control of the incoming materials, storage and drying operations, and the raw materials of the inner injection molded parts (72) are added into the barrel of the injection molding machine for one shot and melted, and the melting temperature is 385° C.-395° C.; the raw materials of the sound net (71) are subjected to the quality control of the incoming materials and storage operations, and the raw materials of the sound net (71) are cut and molded into the sound net (71) and then implanted into the one shot molding mold of the injection molding machine; Step 2: The first shot molding mold is closed, and the injection molding machine is started to squeeze the molten material of the inner injection molding part (72) into the first shot molding mold at an extrusion force of 1600-2200 kgf / cm 3 , forming an inner injection molded part (72), completing the one-shot molding operation of the sound net injection molded part (7), and ejecting the one-shot molded finished product; Step 3: Load the one-shot molding finished product through the vibration plate, transfer the one-shot molding finished product through the robot, perform appearance inspection on the one-shot molding finished product through the CCD component, automatically load the qualified one-shot molding finished product onto the plate, perform appearance re-inspection on the one-shot molding finished product manually, and put the qualified one-shot molding finished product into the warehouse; Step 4: Perform incoming material quality control and warehousing operations on the raw materials of the external injection molded parts (73), inject the raw materials of the external injection molded parts (73) into the barrel of the injection molding machine for the second shot to melt, and the melting temperature is 15-20° C.; implant the finished product of the first shot into the second shot molding mold, Step 5: The two-shot molding mold is closed and the molding cavity is preheated by a high-frequency preheating machine; Step 6: Start extruding the molten raw material of the outer injection molded part (73) into the two-shot molding mold, with an extrusion force of 230-280 Bar, molding the raw material of the outer injection molded part (73), and completing the two-shot molding operation of the sound network injection molded part (7); Step 7: Separate the two-shot molding mold, remove the sprue, eject the sound net injection molded part (7) and clean the mold surface; Step 8: The sound net injection molded parts (7) are divided into holes and placed on trays, and are put into storage after being cleaned, dried and inspected for appearance.

2. A molding mold, the molding mold is the two-shot molding mold proposed in step 4 to step 7 of claim 1, the molding mold comprises a substrate (10), a female mold (2), a male mold (3) and an automatic locking mechanism (5), characterized in that: The base plate (10) is fixedly mounted with a support leg (11), the top of the support leg (11) is fixedly mounted with a support seat (12), the female mold (2) and the male mold (3) are arranged on the upper end of the support seat (12), and the female mold (2) and the male mold (3) cooperate to form an injection molded part; The automatic locking mechanism (5) comprises a female mold locking component and a male mold locking component. The female mold locking component is arranged in the female mold (2), and the male mold locking component is arranged in the male mold (3). The female mold locking component and the male mold locking component cooperate to lock the female mold (2) on the male mold (3). An automatic unlocking mechanism (4) for controlling the unlocking of the female mold locking assembly and the male mold locking assembly is arranged at the upper end of the support (12), and a locking testing mechanism (6) for testing and judging whether the female mold locking assembly and the male mold locking assembly are locked is also arranged at the lower end of the support (12).

3. The molding die according to claim 2, characterized in that: The mother mold locking assembly comprises a blocking bar (51) and a second spring (52); a slide groove (57) is symmetrically provided on the front and rear sides of the mother mold (2); a blocking bar (51) is provided in the slide groove (57) and is limitedly slidably connected to the slide groove (57); an H-shaped groove (56) is provided in the middle of the blocking bar (51); a second spring (52) is provided in the H-shaped groove (56); a receiving groove is provided in the mother mold (2); and the second spring (52) is located in the receiving groove and the H-shaped groove (56).

4. The molding die according to claim 3, characterized in that: The male mold locking assembly comprises a locking rod (53) and a third spring (54); the left and right sides of each stop bar (51) are provided with a locking rod (53) which is locked and connected to the stop bar (51); the locking rod (53) is slidably connected to the male mold (3); a receiving groove is provided in the male mold (3), and the third spring (54) is located in the receiving groove; the lower end of the locking rod (53) is provided with a protrusion which is slidably connected to the inner wall of the receiving groove; and the two ends of the third spring (54) are respectively in contact with the top of the receiving groove and the upper end of the protrusion.

5. The molding die according to claim 4, characterized in that: The blocking bar (51) is provided with a locking groove (55) corresponding to the locking rod (53) and used for locking with the locking rod (53); the upper end of the locking rod (53) is provided with a locking groove (58) for locking with the locking groove (55); and the top end of the locking rod (53) adopts a ball head structure.

6. The molding die according to claim 4, characterized in that: The locking test mechanism (6) comprises a top cylinder (61), a top plate (62) and a top rod (63); the top cylinder (61) is fixedly mounted on the lower end of the support (12); the top plate (62) is fixedly mounted on the output end of the top cylinder (61); four top rods (63) corresponding to the locking rods (53) are fixedly mounted on the top plate (62); the top rods (63) are used to push the locking rods (53) upwards.

7. The molding die according to claim 4, characterized in that: The automatic unlocking mechanism (4) comprises a side-push unlocking assembly (41) and a limit assembly (42) arranged on a support (12); the limit assembly (42) is used to limit the horizontal displacement of the side-push unlocking assembly (41); and the side-push unlocking assembly (41) is used to push a blocking bar (51) to control the locking state of the blocking bar (51) and a locking rod (53).

8. The molding die according to claim 4, characterized in that: The side push unlocking assembly (41) comprises a first fixed seat (411), a transverse plate (412), a first spring (413), a connecting block (414), a handle (415) and a push plate (416); the first fixed seat (411) is fixedly connected to the support (12); the transverse plate (412) is horizontally movably arranged on the first fixed seat (411); the connecting blocks (414) are symmetrically fixedly installed on the front and rear sides of the transverse plate (412) away from the male mold (3); the first spring (413) is fixedly installed between the connecting block (414) and the first fixed seat (411); the other side of the transverse plate (412) is fixedly installed with a push plate (416) for pushing the blocking bar (51); and the transverse plate (412) is also fixedly installed with a handle (415) for pulling the transverse plate (412).

9. The molding die according to claim 8, characterized in that: The limiting assembly (42) is provided with two groups and is symmetrically distributed on the front and rear sides of the first fixed seat (411). The limiting assembly (42) comprises a second fixed seat (421), a stopper (423) and a limiter (424). The two second fixed seats (421) are fixedly connected to the support (12); a limiting groove (422) is provided on one side of the second fixed seat (421) close to the first fixed seat (411); two limiters (424) are fixedly installed on the side of the first fixed seat (411) and are slidably connected to the limiting groove (422); the stopper (423) is fixedly connected to the second fixed seat (421) and is located between the two limiters (424).

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