Injection molds for deep cavity, external undercut and externally threaded handles

Abstract

The present invention relates to an injection mold for molding a handle with a deep cavity and an external undercut and an external thread, which includes a movable mold and a fixed mold, wherein the movable mold core and the fixed mold core of the movable mold and the fixed mold respectively have a first cavity and a second cavity relative to each other, and the movable mold and the fixed mold open and close the mold horizontally, and the second cavity is provided with a cavity insert and an undercut insert in sequence along the length direction, and the cavity walls of the first cavity and the second cavity are formed with a first internal thread and a second internal thread relative to each other, and the fixed mold plate of the fixed mold is provided with a cavity core pulling mechanism and an undercut core pulling mechanism relative to the two ends of the second cavity, and the cavity core pulling mechanism and the undercut core pulling mechanism are respectively connected to the cavity insert and the undercut insert, and are respectively used to drive the cavity insert and the undercut insert to move relative to the second cavity inside and outside. The technical solution can be used for molding a handle with a deep cavity, an external undercut and an external thread, and the overall structure is relatively simple, and the lateral space occupied is small, so that the production land can be reasonably used.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and more specifically to an injection mold for molding a handle with a deep cavity, an external undercut and an external thread. Background Art

[0002] Undercuts are parts of a product design that cannot be demolded directly in the normal mold opening direction. Deep cavities are deep cavities or grooves inside a product. External threads are thread structures that exist on the outer surface of a product. Figure 1 and Figure 2 What is shown is a handle product, in which an external undercut 2102 is formed at one end of the handle 21, and a cavity 2101 is opened inside the handle 21 along the length direction. The cavity 2101 runs through both ends of the handle 21, so the cavity 2101 is a deep cavity. The cavity 2101 is composed of a front cavity and a rear cavity. There are external threads 2103 on the outer wall at the other end of the handle 21. Their presence will greatly increase the difficulty of demolding. Conventional molds are often unable to form products with deep cavities, external undercuts and external threads.

[0003] As shown in the Chinese patent with publication number CN203317605U and patent name "A kind of external thread cavity forming mold", the mold recorded therein includes an upper template module, a threaded core module, a mold sleeve module, a threaded ring module, a guide pin module, a fixed plate module and a lower template module; the threaded core module is arranged in the middle of the upper template module; the guide pin module and the fixed plate module are arranged on the lower template module, wherein one side of the guide pin module is located inside the upper template module; the mold sleeve module, the threaded ring module, the guide pin module and the fixed plate module are arranged in the middle of the upper template module and the lower template module, and from left to right they are the fixed plate module, the guide pin module, the threaded ring module and the mold sleeve module.

[0004] The above mold can only be used for molding products with external threads, which obviously cannot meet the above Figure 1 and Figure 2 In addition, although there are molds on the market for molding products with deep cavities, external undercuts and external threads, such as the Chinese patent with publication number CN106493919A and patent name "A centripetal contraction and step-by-step core pulling and demolding device for injection molds", the structure of such molds is relatively complex, resulting in high mold design costs. At the same time, due to the presence of the deep cavity of the product, the slider mechanism used for deep cavity core pulling has a large stroke, so the entire mold often occupies a large horizontal space. In a limited workplace or factory workshop, it will limit the layout and operating space of other equipment, resulting in reduced production efficiency. Utility Model Content

[0005] In view of the above situation, in order to overcome the above conventional molds can only be used for the molding of products with deep cavities, external undercuts or external threads, can not meet the above Figure 1 and Figure 2 The molding needs of handle products, and the molds that can be used to mold products with deep cavities, external undercuts and external threads have relatively complex structures, high mold design costs, and large lateral space occupation, resulting in limited space and affecting the production efficiency of other equipment. The purpose of the utility model is to provide a mold that can be used for the molding of the above-mentioned handles with deep cavities, external undercuts and external threads, and has a relatively simple overall structure, small lateral space occupation, and can make rational use of production land.

[0006] In order to achieve the above purpose, the technical solution of the utility model is:

[0007] An injection mold for forming a deep cavity with an external undercut and an externally threaded handle, comprising a movable mold and a fixed mold, wherein the movable mold comprises a movable mold seat, a movable mold plate, and a movable mold core, and the fixed mold comprises a fixed mold seat, a fixed mold plate, and a fixed mold core. It also comprises a hot runner pouring mechanism and a cooling mechanism, wherein the movable mold core and the fixed mold core respectively have a first cavity and a second cavity relative to each other, the movable mold and the fixed mold open and close horizontally, a cavity insert and an undercut insert are sequentially arranged in the second cavity along the length direction, and first and second internal threads relative to each other are formed on the cavity walls of the first cavity and the second cavity, and a cavity core pulling mechanism and an undercut core pulling mechanism opposite to two ends of the second cavity are arranged on the fixed mold plate, the cavity core pulling mechanism and the undercut core pulling mechanism are respectively connected to the cavity insert and the undercut insert, and are respectively used to drive the cavity insert and the undercut insert to move relative to the second cavity inward and outward.

[0008] Preferably, the cavity core pulling mechanism includes a front support seat, a cavity core pulling slide, a rear support seat, a guide rod and a cylinder. The front support seat, the cavity core pulling slide and the rear support seat are arranged in sequence from front to back. The front support seat is fixed to the fixed template at one end of the second cavity. A first slide groove is provided on the fixed template on the other side of the front support seat. The cavity core pulling slide is slidably matched with the first slide groove. One end of the cavity insert passes through the front support seat and is connected with the cavity core pulling slide. The guide rod passes through the cavity core pulling slide and is connected with the front support seat and the rear support seat at both ends. The cylinder is arranged on the other side of the rear support seat, and its piston rod passes through the rear support seat and is connected with the cavity core pulling slide.

[0009] Preferably, a slot is provided on the cavity core-pulling slide, and the slot has a large inner diameter section and a small inner diameter section. The large inner diameter section is close to the front support seat, and the small inner diameter section is connected to a side wall of the cavity core-pulling slide close to the rear support seat. The free end of the cylinder piston rod is matched in shape with the slot and inserted into the slot.

[0010] Preferably, the inverted insert includes a fixed component and a movable component, the shape of the fixed component matches the inverted shape of the handle, an installation cavity is opened in the fixed component, the movable component is installed in the installation cavity, and one end of the movable component passes through the installation cavity and abuts against the cavity insert.

[0011] Preferably, the inverted core-pulling mechanism includes an inverted core-pulling slide and a push rod, the fixing component of the inverted insert is formed on the inverted core-pulling slide, a second slide groove is provided on the fixed template, the inverted core-pulling slide is slidably fitted in the second slide groove, the push rod is provided on the movable template, the inverted core-pulling slide is provided with a guide hole, the push rod is opposite to the guide hole, and is inserted into the guide hole, and its mating surface with the guide hole is an inclined surface.

[0012] Preferably, the number of the first cavities and the corresponding second cavities is four groups.

[0013] Preferably, the hot runner pouring mechanism includes a pouring hopper, a feed channel, a hot nozzle, a diverter plate and a temperature control box, the pouring hopper is arranged on the movable mold base, the diverter plate is arranged between the movable mold base and the movable mold plate, the feed channel is opened on the diverter plate and is connected with the first cavity, the pouring hopper and the hot nozzle are respectively arranged at both ends of the feed channel, the discharge nozzle of the hot nozzle penetrates into the first cavity, and the temperature control box is arranged on the feed channel on one side of the diverter plate.

[0014] Preferably, a pressure relief channel is provided on the fixed mold core, and the pressure relief channel is located in the circumferential direction of the second cavity.

[0015] Preferably, the movable mold plate and the movable mold core are provided with interconnected upper cooling channels, the fixed mold plate and the fixed mold core are provided with interconnected lower cooling channels, and the cooling mechanism includes a cooling water pipeline, which is arranged in the upper cooling channel and the lower cooling channel.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] The utility model injection mold can be used for molding a handle product with a deep cavity, an external undercut or an external thread by means of a cavity insert, an undercut insert, a cavity core pulling mechanism, an undercut core pulling mechanism, and a design of a first internal thread and a second internal thread in the first cavity and the second cavity, and the movable mold and the fixed mold are horizontally opened and closed. When the mold is opened, when the first cavity of the movable mold core is separated from the second cavity of the fixed mold core, the first internal thread can be horizontally separated from the thread grooves on both sides of the external thread on the outer wall of the handle product, effectively avoiding the problem that the external thread on the outer wall of the handle product is easily offset against the internal thread when the movable mold and the fixed mold with non-horizontal opening and closing are opened. To solve the interference problem and ensure the smooth opening of the mold, the movable mold and the fixed mold are opened and closed horizontally, so that the cavity core pulling mechanism and the undercut core pulling mechanism are set on a plane parallel to the parting surface. Even when moving, the occupation of horizontal space can be reduced, avoiding the restriction on the layout and operation space of other equipment. After opening the mold, the cavity insert and the undercut insert are driven by the cavity core pulling mechanism and the undercut core pulling mechanism to move out of the second cavity, and then separated from the docking position of the outer undercut and the cavity of the handle product being formed, so that the handle product can be moved out of the second cavity, ensuring the smooth progress of the entire molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the handle product formed by the utility model;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the handle product formed by the utility model;

[0020] Figure 3 It is a schematic diagram of the overall structure of the mold of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the utility model when the mold is opened;

[0022] Figure 5 It is a schematic diagram of the overall structure of the movable mold of the utility model;

[0023] Figure 6 It is a schematic diagram of the overall structure of the movable mold core of the utility model mold;

[0024] Figure 7 This utility model Figure 5 A schematic diagram of the enlarged structure of part A;

[0025] Figure 8 It is a schematic diagram of the overall structure of the fixed mold of the utility model;

[0026] Fig. 9 This is a schematic diagram of the overall structure of the fixed mold of the utility model from another perspective;

[0027] Fig.10 It is a schematic diagram of the overall structure of the fixed mold core of the utility model mold;

[0028] Fig.11 This utility model Fig. 9 A schematic diagram of the enlarged structure of part B;

[0029] Fig.12 It is a schematic diagram of the overall structure of the cavity core pulling mechanism of the utility model mold connected with the cavity insert;

[0030] Fig.13 The utility model is a schematic diagram of the overall structure of an undercut core pulling mechanism in which a mold is connected with an undercut insert.

[0031] As shown in the figure:

[0032] 1. Moving mold base; 2. Moving mold plate; 3. Moving mold core; 301. First cavity; 301a. First internal thread; 4. Fixed mold base; 5. Fixed mold plate; 501. First slide groove; 502. Second slide groove; 6. Fixed mold core; 601. Second cavity; 601a. ​​Second internal thread; 602. Pressure relief channel; 7. Cavity insert; 8. Undercut insert; 801. Fixed component; 802. Movable component; 9. Front support seat ; 10. Cavity core-pulling slide; 1001. Slot; 11. Rear support seat; 12. Guide rod; 13. Cylinder; 1301. Piston rod; 14. Inverted core-pulling slide; 1401. Guide hole; 15. Push rod; 16. Casting hopper; 17. Hot nozzle; 18. Diverter plate; 19. Temperature control box; 20. Cooling water pipeline; 21. Handle; 2101. Cavity; 2102. External undercut; 2103. External thread. DETAILED DESCRIPTION

[0033] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of simplifying the description, and do not indicate or imply that the directions are specific directions that must be possessed and specific directions, structures, and operations, and therefore should not be understood as limitations on the present utility model.

[0035] like Figures 3 to 11As shown, the utility model relates to an injection mold for molding a handle with a deep cavity and an external undercut and an external thread, which includes a movable mold and a fixed mold, the movable mold includes a movable mold base 1, a movable mold plate 2, and a movable mold core 3, the fixed mold includes a fixed mold base 4, a fixed mold plate 5, and a fixed mold core 6, and it also includes a hot runner pouring mechanism and a cooling mechanism, the movable mold core 3 and the fixed mold core 6 respectively have a first cavity 301 and a second cavity 601 opposite to each other, the first cavity 301 and the second cavity 601 form a complete cavity when the movable mold and the fixed mold are molded together, in particular, the movable mold and the fixed mold are opened and closed horizontally, so that the parting surface formed between the movable mold and the fixed mold is perpendicular to the horizontal plane, and a cavity insert 7 and an undercut insert 8 are sequentially arranged in the second cavity 601 along the length direction, and the cavity insert 7 and the undercut insert 8 are respectively used for the hand The outer undercut 2102 on the outer wall of the handle 21 product and the inner cavity 2101 are formed, and the first cavity 301 and the second cavity 601 are formed with relative first internal threads 301a and second internal threads 601a. ​​After the mold is closed, the first internal threads 301a and the second internal threads 601a are connected to each other to form a complete internal thread. The internal threads protruding from the inner wall of the cavity can form a thread-shaped concave thread groove on the outer wall when the handle 21 product is formed, and an external thread 2103 is formed between adjacent thread grooves. The fixed mold plate 5 is provided with a cavity core pulling mechanism and an undercut core pulling mechanism opposite to the two ends of the second cavity 601. The cavity core pulling mechanism and the undercut core pulling mechanism are respectively connected to the cavity insert 7 and the undercut insert 8, and are respectively used to drive the cavity insert 7 The utility model injection mold can be used for molding a handle 21 product with a deep cavity, an external undercut 2102 or an external thread 2103 through the design of the cavity insert 7, the undercut insert 8, the cavity core pulling mechanism, the undercut core pulling mechanism, and the first internal thread 301a and the second internal thread 601a in the first cavity 301 and the second cavity 601, and the movable mold and the fixed mold are opened and closed horizontally. When the mold is opened, when the first cavity 301 of the movable mold core 3 is separated from the second cavity 601 of the fixed mold core 6, the first internal thread 301a can be horizontally separated from the thread grooves on both sides of the external thread 2103 on the outer wall of the handle 21 product, which effectively avoids the movable mold and the fixed mold from opening and closing the non-horizontal mold. During the molding process, the external thread 2103 on the outer wall of the handle 21 product is easily interfered with the internal thread, so as to ensure the smooth opening of the mold. Similarly, based on the horizontal opening and closing between the movable mold and the fixed mold, the cavity core pulling mechanism and the undercut core pulling mechanism are arranged on a plane parallel to the parting surface, which can reduce the occupation of horizontal space even when moving, avoiding the restriction on the layout and operation space of other equipment. After the mold is opened, the cavity insert 7 and the undercut insert 8 are driven by the cavity core pulling mechanism and the undercut core pulling mechanism to move out of the second cavity 601, and then separated from the docking position of the outer undercut 2102 and the cavity 2101 of the handle 21 product, so that the handle 21 product can be moved out of the second cavity 601, ensuring the smooth progress of the entire molding process.

[0036] like Figure 3 , Figure 4 , Figure 8 , Fig. 9 and Fig.11 As shown, the cavity core-pulling mechanism includes a front support seat 9, a cavity core-pulling slide seat 10, a rear support seat 11, a guide rod 12 and a cylinder 13, wherein the front support seat 9, the cavity core-pulling slide seat 10 and the rear support seat 11 are arranged in sequence from front to back, wherein the front support seat 9 is fixed on the fixed template 5 at one end of the second cavity 601, a first slide groove 501 is provided on the fixed template 5 on the other side of the front support seat 9, the cavity core-pulling slide seat 10 is slidably matched with the first slide groove 501, and moves along the first slide groove 501 to approach or move away from the front support seat 9 and the second cavity 601, one end of the cavity insert 7 passes through the front support seat 9 and is connected with the cavity core-pulling slide seat 10, and when the cavity core-pulling slide seat 10 moves, it drives the cavity insert 7 to move inward and outward relative to the second cavity 601, so that After the mold is opened, it can be pulled out from the cavity 2101 of the formed handle 21 product. The guide rod 12 passes through the cavity core-pulling slide 10 and is connected to the front support seat 9 and the rear support seat 11 at both ends. The cylinder 13 is arranged on the other side of the rear support seat 11, and its piston rod 1301 passes through the rear support seat 11 and is connected to the cavity core-pulling slide 10. The cavity core-pulling mechanism uses the cylinder 13 as a power source. When the cylinder 13 is running, its piston rod 1301 drives the cavity core-pulling slide 10 to reciprocate along the first slide groove 501 to move the cavity insert 7 inward and outward relative to the second cavity 601. The cavity core-pulling slide 10 is guided by the guide rod 12 to move along a straight line to avoid the position of the connected cavity insert 7 deviating from being directly opposite to the second cavity 601.

[0037] like Figure 4 , Figure 8 , Fig. 9 and Fig.11 As shown, a slot 1001 is provided on the cavity core-pulling slide 10, and the slot 1001 has a large inner diameter section and a small inner diameter section. The large inner diameter section is close to the front support seat 9, and the small inner diameter section is connected with a side wall of the cavity core-pulling slide 10 close to the rear support seat 11. The free end shape of the piston rod 1301 of the cylinder 13 matches the slot 1001 and is inserted into the slot 1001. Based on the above arrangement, the piston rod 1301 of the cylinder 13 can be prevented from being separated from the cavity core-pulling slide 10 during reciprocating movement, thereby improving the stability of the connection.

[0038] like Figure 4 , Figure 8 , Fig. 9 and Fig.11As shown, during the injection molding process of the handle 21 product, due to the large depth of the cavity 2101, the cavity insert 7 will be subjected to a large clamping force of the product when it is withdrawn from the cavity 2101, which increases the difficulty of demoulding and even causes product damage. To solve this problem, the utility model designs the undercut insert 8 as a split structure consisting of a fixed component 801 and a movable component 802. The shape of the fixed component 801 matches the shape of the outer undercut 2102 of the handle 21, and it is used to directly mold the outer undercut 2102 on the finished handle 21 product. The fixed component 801 is provided with an installation cavity, and the movable component 802 is installed in the installation cavity, and one end of the fixed component 801 passes through the installation cavity and is connected to the cavity insert. The movable component 802 of the undercut insert 8 cooperates with the cavity insert 7 to jointly form the cavity 2101 of the handle 21 product. More specifically, the movable component 802 and the cavity insert 7 are respectively used for forming the rear cavity and the front cavity of the cavity 2101. After the mold is opened, the movable component 802 of the undercut insert 8 and the cavity insert 7 move in opposite directions and detach from the cavity 2101 at both ends of the handle 21 product, thereby dispersing the clamping force originally concentrated in a single direction to the movable component 802 of the undercut insert 8 and the cavity insert 7, thereby reducing the resistance when the cavity insert 7 is withdrawn, effectively reducing the influence of the clamping force, and ensuring the smooth demolding of the handle 21 product.

[0039] like Figure 4 , Figure 8 , Fig. 9 and Fig.13 As shown, the undercut core pulling mechanism includes an undercut core pulling slide 14 and a push rod 15, a fixing member 801 of the undercut insert 8 is formed on the undercut core pulling slide 14, a second slide groove 502 is provided on the fixed mold plate 5, the undercut core pulling slide 14 is slidably matched in the second slide groove 502, and the undercut core pulling slide 14 drives the undercut insert 8 to move relative to the second cavity 601 by reciprocating along the second slide groove 502, and the push rod 15 is provided on the movable mold plate 2, and the undercut core pulling slide 14 is provided with a guide hole 1401 The push rod 15 is opposite to the guide hole 1401 and inserted in the guide hole 1401, and the mating surface between the push rod 15 and the guide hole 1401 is an inclined surface. When the mold is opened, when the movable mold is separated from the fixed mold, the guide rod 12 can convert the movement of the movable mold relative to the fixed mold into the reciprocating movement of the undercut core-pulling slide 14, so that the undercut insert 8 is automatically pulled out of the outer undercut 2102 and the cavity 2101 of the molded handle 21 product, and can be completed without configuring an additional power source, making the structure of the injection mold of the utility model more streamlined.

[0040] like Figures 4 to 6 as well as Figures 8 to 10As shown, in order to improve the molding efficiency of the handle 21 product, the number of the first cavity 301 and the corresponding second cavity 601 is four groups, and the corresponding cavity inserts 7 and undercut inserts 8 are also configured in corresponding four groups, so that four sets of handle 21 products can be molded simultaneously in unit time without increasing the overall volume of the mold, thereby improving the molding efficiency.

[0041] like Figures 3 to 5 and Figure 7 As shown, the hot runner pouring mechanism includes a pouring hopper 16, a feed channel, a hot nozzle 17, a diverter plate 18 and a temperature control box 19. The pouring hopper 16 is arranged on the movable mold base 1, and the diverter plate 18 is arranged between the movable mold base 1 and the movable mold plate 2. The feed channel is opened on the diverter plate 18 and is connected with the first cavity 301. The pouring hopper 16 and the hot nozzle 17 are respectively arranged at both ends of the feed channel, and the discharge nozzle of the hot nozzle 17 passes through the first cavity 301. It can be understood that the first cavity 301 and the corresponding second cavity 601 in the utility model have a total of four groups, so that the hot nozzle 17 has a corresponding number to form each handle 21 product, and the temperature control box 19 is arranged on the side of the diverter plate 18 where the feed channel is located.

[0042] like Figures 8 to 11 As shown, a pressure relief channel 602 is provided on the fixed mold core 6, and the pressure relief channel 602 is located on the circumference of the second cavity 601. The pressure relief channel 602 is provided to discharge the gas in the cavity during the molding process of the handle 21 product to prevent the generation of bubbles, and to discharge the smoke and hot air generated in the molding process, thereby reducing the cavity temperature and ensuring the molding quality. At the same time, the pressure and impact in the cavity are reduced, thereby reducing the risk of damage to the handle 21 product during molding, thereby providing good protection for the handle 21 product.

[0043] like Figures 3 to 5 as well as Fig. 9 and Fig.10 As shown, the movable mold plate 2 and the movable mold core 3 are provided with interconnected upper cooling channels, and the fixed mold plate 5 and the fixed mold core 6 are provided with interconnected lower cooling channels. The cooling mechanism includes a cooling water pipeline 20, and the cooling water pipeline 20 is arranged in the upper cooling channel and the lower cooling channel. After the cooling water enters the cooling water pipe, the cavity and the molded handle 21 product can be directly cooled. The flowing cooling water is used to take away the heat inside the cavity to prevent the mold from overheating and extend the service life of the entire mold. At the same time, it can accelerate the cooling and solidification process of the molten blank in the cavity, thereby shortening the molding cycle of the handle 21 product, improving production efficiency, reducing the stress and deformation inside the handle 21, and improving its dimensional accuracy and surface quality.

[0044] Combination Figures 1 to 11The mold of the utility model is used to form a handle 21 product with a deep cavity, an external undercut 2102 or an external thread 2103, and can simultaneously form four sets of handle 21 products in a unit time. After the forming is completed, the movable mold and the fixed mold move horizontally back to back to open the mold, and the first cavity 301 of the movable mold core 3 is separated from the second cavity 601 of the fixed mold core 6. The first internal thread 301a on the inner wall of the first cavity 301 can be horizontally separated from the thread grooves on both sides of the external thread 2103 on the outer wall of the handle 21 product. At the same time, the movable mold drives the guide rod 12 to move synchronously, and the guide rod 12 turns the movable mold relative to the fixed mold. The reciprocating movement of the undercut core-pulling slide 14 causes the fixed component 801 and the movable component 802 of the undercut insert 8 to be automatically pulled out from the outer undercut 2102 and the cavity 2101 side of the molded handle 21 product, and then the oil cylinder 13 of the cavity core-pulling mechanism is operated. When the oil cylinder 13 is in operation, its piston rod 1301 drives the cavity core-pulling slide 10 to move along the first slide groove 501 away from the second cavity 601, so that the cavity insert 7 moves outward relative to the second cavity 601 and is pulled out from the other side of the cavity 2101 of the product handle 21, so that the handle 21 product can be moved out of the second cavity 601 to complete the molding.

[0045] The above embodiments and descriptions are only for explaining the principle and the best embodiment of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements shall fall within the scope of the present invention to be protected.

Claims

1. An injection mold for molding a handle with a deep cavity, an external undercut and an external thread, comprising a movable mold and a fixed mold, wherein the movable mold comprises a movable mold base (1), a movable mold plate (2), and a movable mold core (3), and the fixed mold comprises a fixed mold base (4), a fixed mold plate (5), and a fixed mold core (6), and further comprises a hot runner pouring mechanism and a cooling mechanism, wherein the movable mold core (3) and the fixed mold core (6) respectively have a first cavity (301) and a second cavity (601) opposite to each other, and wherein: The movable mold and the fixed mold open and close horizontally, and the second cavity (601) is provided with a cavity insert (7) and an undercut insert (8) in sequence along the length direction. The first cavity (301) and the second cavity (601) are provided with first internal threads (301a) and second internal threads (601a) opposite to each other on the cavity walls. The fixed mold plate (5) is provided with a cavity core pulling mechanism and an undercut core pulling mechanism opposite to the two ends of the second cavity (601). The cavity core pulling mechanism and the undercut core pulling mechanism are respectively connected to the cavity insert (7) and the undercut insert (8), and are respectively used to drive the cavity insert (7) and the undercut insert (8) to move inward and outward relative to the second cavity (601).

2. The injection mold for forming a handle with a deep cavity, an external undercut and an external thread according to claim 1, characterized in that: The cavity core-pulling mechanism comprises a front support seat (9), a cavity core-pulling slide seat (10), a rear support seat (11), a guide rod (12) and a cylinder (13); the front support seat (9), the cavity core-pulling slide seat (10) and the rear support seat (11) are arranged in sequence from front to back; the front support seat (9) is fixed on a fixed mold plate (5) at one end of the second cavity (601); a first slide groove (501) is provided on the fixed mold plate (5) on the other side of the front support seat (9); The core-pulling slide (10) is slidably matched with the first slide groove (501), one end of the cavity insert (7) passes through the front support seat (9) and is connected to the cavity core-pulling slide (10), the guide rod (12) passes through the cavity core-pulling slide (10) and is connected to the front support seat (9) and the rear support seat (11) at both ends, and the oil cylinder (13) is arranged on the other side of the rear support seat (11), and its piston rod (1301) passes through the rear support seat (11) and is connected to the cavity core-pulling slide (10).

3. The injection mold for forming a handle with a deep cavity, an external undercut and an external thread according to claim 2, characterized in that: The cavity core-pulling slide (10) is provided with a slot (1001), and the slot (1001) has a large inner diameter section and a small inner diameter section, the large inner diameter section is close to the front support seat (9), and the small inner diameter section is connected to a side wall of the cavity core-pulling slide (10) close to the rear support seat (11), and the free end shape of the piston rod (1301) of the oil cylinder (13) matches the slot (1001) and is inserted into the slot (1001).

4. The injection mold for forming a handle with a deep cavity, an external undercut and an external thread according to claim 1, characterized in that: The undercut insert (8) comprises a fixed component (801) and a movable component (802), the shape of the fixed component (801) matches the shape of the outer undercut (2102) of the handle (21), an installation cavity is provided in the fixed component (801), the movable component (802) is installed in the installation cavity, and one end of the movable component (802) passes through the installation cavity and abuts against the cavity insert (7).

5. The injection mold for forming a handle with a deep cavity, an external undercut and an external thread according to claim 4, characterized in that: The inverted core-pulling mechanism includes an inverted core-pulling slide (14) and a push rod (15); the fixing component (801) of the inverted insert (8) is formed on the inverted core-pulling slide (14); a second slide groove (502) is provided on the fixed template (5); the inverted core-pulling slide (14) is slidably fitted in the second slide groove (502); the push rod (15) is arranged on the movable template (2); the inverted core-pulling slide (14) is provided with a guide hole (1401); the push rod (15) is opposite to the guide hole (1401) and is inserted into the guide hole (1401); and the mating surface between the push rod and the guide hole (1401) is an inclined surface.

6. The injection mold for molding a handle with a deep cavity, an external undercut and an external thread according to claim 1, characterized in that: The number of the first mold cavities (301) and the corresponding second mold cavities (601) is four groups.

7. The injection mold for forming a handle with a deep cavity, an external undercut and an external thread according to claim 1, characterized in that: The hot runner pouring mechanism comprises a pouring hopper (16), a feed channel, a hot nozzle (17), a diverter plate (18) and a temperature control box (19); the pouring hopper (16) is arranged on the movable mold base (1); the diverter plate (18) is arranged between the movable mold base (1) and the movable mold plate (2); the feed channel is opened on the diverter plate (18) and is connected to the first cavity (301); the pouring hopper (16) and the hot nozzle (17) are respectively arranged at two ends of the feed channel; the discharge nozzle of the hot nozzle (17) penetrates into the first cavity (301); and the temperature control box (19) is arranged on the side of the feed channel where the diverter plate (18) is located.

8. The injection mold for forming a handle with a deep cavity, an external undercut and an external thread according to claim 1, characterized in that: The fixed mold core (6) is provided with a pressure relief channel (602), and the pressure relief channel (602) is located in the circumferential direction of the second mold cavity (601).

9. The injection mold for forming a handle with a deep cavity, an external undercut and an external thread according to claim 1, characterized in that: The movable mold plate (2) and the movable mold core (3) are provided with interconnected upper cooling channels, the fixed mold plate (5) and the fixed mold core (6) are provided with interconnected lower cooling channels, and the cooling mechanism comprises a cooling water pipeline (20), and the cooling water pipeline (20) is arranged in the upper cooling channel and the lower cooling channel.

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