Injection mold with lock joint

Abstract

The invention relates to the technical field of baby crib production, and provides an injection mold with a lock joint, the injection mold comprises a fixed mold, a movable mold, a core pulling block and a core pulling mechanism, an injection molding cavity is formed in the fixed mold, an injection molding opening is formed in the movable mold, and when the movable mold and the fixed mold are closed, the injection molding opening communicates with the injection molding cavity; the core pulling block is movably arranged on the fixed mold and is positioned in the injection molding cavity; the core pulling mechanism is arranged on the fixed mold, is connected with the core pulling block and is used for pulling out the core pulling block from the injection molding cavity; the core pulling mechanism comprises a linear air cylinder, a sliding seat and a rotating motor, the sliding seat is movably arranged in the horizontal direction, and the linear air cylinder is connected with the sliding seat and used for controlling the sliding seat to move linearly; and the rotating motor is arranged on the sliding seat, is connected with the core pulling block and is used for controlling the core pulling block to rotate. The core pulling device has the effect of performing core pulling operation on the molded product under the condition that the internal threads are not damaged.

Description

Technical Field

[0001] The present application relates to the technical field of baby crib production, and in particular to an injection mold with a locking joint. Background Art

[0002] Cribs are designed for infants and young children, and portable folding cribs are popular because of their convenience. This type of bed uses a mechanical structure and can be easily folded into a compact travel package. The common folding crib base frame on the market is composed of four steel pipes arranged diagonally in a rectangular shape and connected at a joint structure. The steel pipes can be folded and unfolded quickly by rotating the joints, thereby realizing the rapid folding and unfolding function of the crib base frame.

[0003] At present, injection molds are needed in the production process of plastic pipe fittings for baby beds. Injection molds are commonly used molds for molding plastic products. Various forms of plastic products can be molded through injection molds to meet people's various needs.

[0004] In view of the diverse process requirements of plastic products, it is usually necessary to design characteristic structures such as holes or notches on the side walls of plastic products. Therefore, the injection mold is equipped with a corresponding lateral core pulling mechanism so that during the mold opening process, the core pulling mechanism can be moved laterally to form the desired holes or notches on the molded product.

[0005] In the existing technology, the core-pulling injection mold is usually composed of a fixed mold, a movable mold and a core-pulling mechanism. The fixed mold and the movable mold are arranged opposite to each other, and when the two are closed, a cavity is formed. The core-pulling mechanism is installed on the fixed mold, including a cylinder and a core-pulling block, wherein the telescopic rod of the cylinder is connected to the core-pulling block. After the injection molding is completed, the telescopic rod of the cylinder is controlled to shrink, so that the core-pulling block is pulled out of the molded product.

[0006] In view of the above-mentioned related technologies, in order to form an internal thread hole on the molded product, the outer surface of the core pull block is designed with a corresponding external thread. After the injection molding process is completed, if the core pull block is directly pulled out in a straight line using a cylinder, the internal thread may be damaged, thereby affecting the quality of the product, so it needs to be improved. Summary of the invention

[0007] In order to perform a core pulling operation on a molded product without damaging the internal thread, the present application provides an injection mold with a locking joint.

[0008] The present application provides a locking joint injection mold that adopts the following technical solution: A locking joint injection mold, comprising a fixed mold, a movable mold, a core pulling block and a core pulling mechanism, wherein the movable mold and the fixed mold are arranged relative to each other in the upper and lower directions, the movable mold is movably arranged and located above the fixed mold, an injection cavity is provided on the fixed mold, and an injection port is provided on the movable mold, and when the movable mold is molded with the fixed mold, the injection port and the injection cavity are communicated; the core pulling block is movably arranged on the fixed mold and located in the injection cavity; the core pulling mechanism is arranged on the fixed mold and connected to the core pulling block, and is used to pull the core pulling block out of the injection cavity; The core pulling mechanism comprises a linear cylinder, a slide and a rotary motor, wherein the slide is movably arranged in the horizontal direction, the linear cylinder is connected to the slide and is used to control the linear movement of the slide; the rotary motor is arranged on the slide, the rotary motor is connected to the core pulling block and is used to control the rotation of the core pulling block, the output shaft of the rotary motor has a self-locking function, and the output shaft of the rotary motor is detachably connected to the core pulling block; The core-pulling block comprises an outer core and an inner core. The outer core is hollow and one end of the outer core is provided with a threaded portion, which is used to form a threaded hole. The inner core is detachably connected to the outer core, and the rotating motor is detachably connected to the inner core.

[0009] By adopting the above technical solution, after the movable mold and the fixed mold are closed, the material is injected from the injection port into the injection cavity for molding. After the injection is completed, the rotary motor is operated, and the rotary motor drives the entire core pulling block to rotate; at the same time, the linear cylinder controls the slide to move in a straight line in the horizontal direction, driving the entire rotary motor and the core pulling block to move away from the injection cavity, so as to pull the core pulling block out of the molded product. By using the rotary extraction method, the core of the molded product can be pulled without damaging the internal thread, thereby ensuring product quality.

[0010] Preferably, it also includes a fastening bolt and a fastening nut, a fixing block is provided at one end of the inner core close to the rotating motor, a slot is opened on the fixing block, the output shaft is inserted into the slot, the fastening bolt passes through the fixing block and the output shaft at the same time, and the fastening nut is threaded on the fastening bolt.

[0011] By adopting the above technical solution, during installation, the output shaft of the rotating motor is inserted into the slot, and then the fastening bolts are passed through the fixing block and the output shaft at the same time, and finally the fastening nuts are screwed onto the fastening bolts to complete the detachable connection between the fixing block and the output shaft.

[0012] Preferably, a groove is provided at the end of the output shaft, a spring and a trapezoidal block are connected in the groove, two ends of the spring are respectively connected to the output shaft and the trapezoidal block, and the elastic force direction of the spring is perpendicular to the output shaft; the trapezoidal block is slidably connected to the side wall of the groove, and the moving direction of the trapezoidal block is parallel to the elastic force direction of the spring; when the spring is in a natural state, the upper bottom of the trapezoidal block is located outside the groove; a sink groove is connected in the slot, and when the output shaft is inserted into the slot, the spring is in a compressed state, and the upper bottom of the trapezoidal block is clamped in the sink groove.

[0013] By adopting the above technical solution, when the output shaft is gradually inserted into the slot, the trapezoidal block squeezes the spring, and the spring is in the groove and compressed. When the trapezoidal block moves to the position of the sink, the elastic force of the spring will push the trapezoidal block into the sink, and the spring is still in a compressed state, and the spring exerts a vertical force on the trapezoidal block. With the cooperation of the trapezoidal block and the sink, the stability of the connection between the output shaft and the fixed block is further improved.

[0014] When the output shaft needs to be pulled out of the slot, during the process of the output shaft moving away from the fixed block, due to the presence of the trapezoidal inclined surface of the trapezoidal block, the trapezoidal block will slip and further squeeze the spring, so that the trapezoidal block gradually enters the groove, thereby facilitating the separation of the output shaft and the fixed block.

[0015] Preferably, the diameter of the fixed block is larger than the diameter of the inner core, the fixed block is threadedly connected to the inner core, a plurality of clamping plates are rotatably connected to the inner core, the angle formed by the clamping plates and the insertion direction of the inner core is an obtuse angle, and the clamping plates are spaced apart along the length direction of the inner core; a plurality of clamping grooves are provided on the inner wall of the outer core, and when the inner core is inserted into the outer core, the clamping plates rotate first and are finally clamped in the clamping grooves respectively.

[0016] By adopting the above technical solution, when the inner core needs to be installed on the outer core, the end of the inner core away from the fixed block is aligned with the outer core, and then gradually inserted into the inner part of the outer core. During the insertion process, each card plate will rotate due to the blockage of the inner wall of the outer core, and the card plate will rotate to fit on the outer surface of the inner core. When one end of the inner core is seen to extend from the end where the threaded portion of the outer core is located, stop applying thrust to the inner core, and at this time, each card plate will be simultaneously clamped in each slot. Subsequently, the fixed block is screwed to the end of the inner core away from the threaded portion to limit the inner core from being separated from the other end of the outer core.

[0017] Since the card plate can only rotate in one direction (i.e., the angle formed by the rotation direction and the insertion direction of the card plate is always an obtuse angle), after the card plate is inserted into the card slot, the inner core can only be pulled out from the end where the threaded portion of the outer core is located along the insertion direction, and cannot be pulled out from the end where the fixed block is located. In this way, when the rotating motor controls the rotation of the inner core, the inner core and the outer core will not separate. At the same time, it does not affect the detachability of the inner core and the outer core. When the inner core needs to be removed from the outer core, the fixed block can be removed from the inner core first, and then external force can be continued to be applied to the inner core to make the inner core move in a straight line away from the rotating motor, thereby pulling out the inner core.

[0018] Preferably, the clamping plates are distributed at intervals along the circumference of the inner core.

[0019] By adopting the above technical solution, the multi-point clamping plate can improve the stability of the connection between the inner core and the outer core.

[0020] Preferably, the fixed mold is connected to a plurality of positioning posts, each of which is spaced apart, and the movable mold is connected to a plurality of positioning cylinders, each of which is provided with a positioning groove, and each of the positioning grooves corresponds to the positioning post in upper and lower positions.

[0021] By adopting the above technical solution, when the movable mold and the fixed mold are closed, each positioning column will be inserted into each positioning groove, thereby improving the connection stability between the movable mold and the fixed mold.

[0022] Preferably, the outer surface of the positioning column is provided with a plurality of friction lines.

[0023] By adopting the above technical solution, the roughness coefficient of the friction pattern is relatively large, which can increase the static friction force of the positioning column and the positioning cylinder and improve the connection firmness.

[0024] Preferably, it also includes a wedge block and a hinge column, wherein the wedge block is slidably connected to the fixed mold in the horizontal direction and is used to seal the injection cavity; a strip groove is opened on the fixed mold, and the strip groove is located below the wedge block; one end of the hinge column is hinged in the strip groove, and the other end passes through the wedge block; when the injection mold is in the injection state, the hinge column tilts upward in the direction close to the center of the fixed mold, and the movable mold is pressed against the hinge column.

[0025] By adopting the above technical solution, when the movable mold and the fixed mold are closed together, the movable mold will produce a vertical downward pressure on the inclined hinged column, so that the wedge block has a movement tendency in the direction close to the center of the fixed mold, so that the wedge block abuts against the peripheral side of the injection cavity, thereby completing the sealing of the injection cavity.

[0026] Preferably, it further comprises a pressing portion, which is arranged at one end of the hinge column away from the strip groove, the peripheral side of the pressing portion presents a smooth transition, and the outer diameter of the pressing portion is greater than the outer diameter of the hinge column.

[0027] By adopting the above technical solution, after the movable mold and the fixed mold are separated from each other, the worker's thumb can be pressed on the pressing part, and the other four fingers can hold the hinge column, and then apply pulling force to the hinge column to drive the wedge block to move in a direction away from the center of the fixed mold, making it convenient for the worker to remove the molded product in the injection cavity.

[0028] Preferably, the hinged columns and the wedge blocks are provided in several groups.

[0029] In summary, the present application includes at least one of the following beneficial technical effects: (1) By setting up the core pulling block and the core pulling mechanism, after the injection molding process is completed, the rotary motor is started, which drives the core pulling block to rotate; at the same time, the linear cylinder guides the slide to move in a straight line in the horizontal direction, thereby driving the rotary motor and the core pulling block away from the injection molding cavity, so that the core pulling block can be safely pulled out of the molded product. By adopting the rotary extraction technology, the core pulling operation can be performed on the molded product without damaging the internal thread, ensuring the quality of the product.

[0030] (2) By providing a detachable connection between the output shaft of the rotating motor and the core pulling block, it is convenient to replace the core pulling block during the production process. The core pulling blocks with threaded parts of different sizes can be replaced according to actual needs, thereby improving practicality.

[0031] (3) By setting the wedge block and the hinge column, when the movable mold and the fixed mold are closed, the movable mold will apply a vertical downward pressure to the inclined hinge column, prompting the wedge block to move in the direction toward the center of the fixed mold, thereby achieving close contact between the wedge block and the surrounding side of the injection cavity, completing the sealing of the injection cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the injection mold in the embodiment of the present application; Figure 2 Schematic diagram of the explosion of the movable mold and the fixed mold in the embodiment of the present application; Figure 3 It is a structural schematic diagram of the movable mold in the embodiment of the present application; Figure 4 It is a structural schematic diagram of the connection between the rotating motor and the core pulling block in the embodiment of the present application; Figure 5 It is an exploded schematic diagram of the outer core and the inner core in the embodiment of the present application; Figure 6 is a cross-sectional schematic diagram of a core pulling block AA in another embodiment of the present application; Figure 7 yes Figure 7 An enlarged schematic diagram of a local portion A; Figure 8is a cross-sectional schematic diagram of a core pulling block in another embodiment of the present application; Fig. 9 yes Figure 7 Enlarged schematic diagram of partial B.

[0033] : 1. fixed mold; 2. movable mold; 3. core-pulling block; 31. outer core; 32. inner core; 4. core-pulling mechanism; 41. linear cylinder; 42. slide seat; 43. rotary motor; 5. injection cavity; 6. injection port; 7. positioning column; 8. positioning cylinder; 9. positioning groove; 10. friction pattern; 11. fixed block; 12. output shaft; 13. slot; 14. fastening bolt; 15. fastening nut; 16. groove; 17. spring; 18. trapezoidal block; 19. clamping plate; 20. clamping groove; 21. wedge block; 22. hinged column; 23. strip groove; 24. pressing part; 25. threaded part; 26. countersunk groove. DETAILED DESCRIPTION

[0034] The technical solution of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The present application can be embodied in many different forms and is not limited to the embodiments described here.

[0035] In the description of the present application, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics represented can be combined in any one or more embodiments or examples in a suitable manner.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection; it can also be a detachable connection; or integrated; it can also be a mechanical connection. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0038] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples shown in the present application.

[0039] The present application embodiment discloses a locking joint injection mold. Figure 1 and Figure 2 The injection mold includes a fixed mold 1, a movable mold 2, a core pulling block 3 and a core pulling mechanism 4. The movable mold 2 and the fixed mold 1 are arranged relatively to each other in the upper and lower parts, the fixed mold 1 is fixedly arranged, and the movable mold 2 is movably arranged and is located directly above the fixed mold 1. An injection cavity 5 is provided on the fixed mold 1, and the injection cavity 5 is used to mold the product; an injection port 6 is provided on the movable mold 2, and the injection port 6 is used to inject slurry. When the movable mold 2 is molded with the fixed mold 1, the injection port 6 is connected with the injection cavity 5. The core pulling block 3 is movably arranged on the fixed mold 1 and is located in the injection cavity 5; the core pulling mechanism 4 is installed on the fixed mold 1 and is connected to the core pulling block 3, and the core pulling mechanism 4 is used to pull the core pulling block 3 out of the injection cavity 5.

[0040] Combination Figure 3 , the fixed mold 1 is connected with a plurality of positioning posts 7, the number of which is four, and each positioning post 7 is spaced apart and distributed at the four corners of the fixed mold 1. The movable mold 2 is fixedly connected with the same number of positioning cylinders 8 as the positioning posts 7, and the positioning cylinders 8 are provided with positioning grooves 9, and each positioning groove 9 corresponds to the positioning post 7 up and down. When the movable mold 2 and the fixed mold 1 are closed, each positioning post 7 is inserted into each positioning groove 9. Among them, the outer surface of the positioning post 7 is provided with a plurality of friction lines 10. The friction lines 10 can make the outer surface of the positioning post 7 rougher, thereby increasing the static friction between the positioning post 7 and the positioning cylinder 8 and improving the connection firmness.

[0041] Specifically, the core pulling mechanism 4 includes a linear cylinder 41, a slide 42 and a rotary motor 43. The slide 42 is movably arranged in the horizontal direction. The piston rod of the linear cylinder 41 is connected to the slide 42 and is used to control the linear movement of the slide 42. The rotary motor 43 is installed on the slide 42, and the rotary motor 43 is connected to the core pulling block 3 and is used to control the rotation of the core pulling block 3. The output shaft 12 of the rotary motor 43 has a self-locking function, and the output shaft 12 of the rotary motor 43 is detachably connected to the core pulling block 3.

[0042] Combination Figure 4 and Figure 5In this embodiment, the core-pulling block 3 includes an outer core 31 and an inner core 32. The outer core 31 is hollow, and a threaded portion 25 is provided at one end of the outer core 31. The threaded portion 25 is used to form a threaded hole. The inner core 32 is detachably connected to the outer core 31, and the rotating motor 43 is detachably connected to the inner core 32. The inner core 32 is integrally connected to the fixed block 11 at one end close to the rotating motor 43. The fixed block 11 is provided with a slot 13. The output shaft 12 is inserted into the slot 13 and is locked on the fixed block 11 by a fastening bolt 14 and a fastening nut 15. The fastening bolt 14 passes through the fixed block 11 and the output shaft 12 at the same time, and the fastening nut 15 is screwed on the fastening bolt 14 to achieve the fixation of the fixed block 11 and the output shaft 12.

[0043] After the movable mold 2 and the fixed mold 1 are closed, the material is injected from the injection port 6 into the injection cavity 5 for molding. After the injection molding is completed, the rotary motor 43 is operated, and the rotary motor 43 drives the entire core pulling block 3 to rotate; at the same time, the linear cylinder 41 controls the slide 42 to move linearly in the horizontal direction, driving the entire rotary motor 43 and the core pulling block 3 to move in a direction away from the injection cavity 5, so as to pull the core pulling block 3 out of the molded product. By using the rotary extraction method, the core of the molded product can be pulled without damaging the internal thread, thereby ensuring product quality.

[0044] Reference Figure 6 and Figure 7 In some embodiments, a groove 16 is provided at the end of the output shaft 12, and a spring 17 and a trapezoidal block 18 are connected in the groove 16. The two ends of the spring 17 are connected to the output shaft 12 and the trapezoidal block 18 respectively, and the elastic force direction of the spring 17 is perpendicular to the output shaft 12. The trapezoidal block 18 is an isosceles trapezoid and is slidably connected to the side wall of the groove 16. The moving direction of the trapezoidal block 18 is parallel to the elastic force direction of the spring 17. The sliding of the trapezoidal block 18 can adopt the structure of the slider and the slide groove in the prior art. When the spring 17 is in a natural state, the upper bottom of the trapezoidal block 18 is located outside the groove 16. A sink 26 is connected to the slot 13, and the shape of the sink 26 is adapted to the end where the upper bottom of the trapezoidal block 18 is located; when the output shaft 12 is inserted into the slot 13, the spring 17 is in a compressed state, and the upper bottom of the trapezoidal block 18 is clamped in the sink 26, and the upper bottom of the trapezoidal block 18 is still located outside the groove 16.

[0045] When the output shaft 12 is gradually inserted into the slot 13, the trapezoidal block 18 squeezes the spring 17, and the spring 17 is in the groove 16 and is compressed. When the trapezoidal block 18 moves to the location of the sink 26, the elastic force of the spring 17 pushes the trapezoidal block 18 into the sink 26, and the spring 17 is still in a compressed state, and the spring 17 exerts a vertical force on the trapezoidal block 18. With the cooperation between the trapezoidal block 18 and the sink 26, the stability of the connection between the output shaft 12 and the fixed block 11 is further improved.

[0046] When the output shaft 12 needs to be pulled out of the slot 13, during the process of the output shaft 12 moving away from the fixed block 11, due to the existence of the waist slope of the trapezoidal block 18, the trapezoidal block 18 will slip and further squeeze the spring 17, so that the trapezoidal block 18 gradually enters the groove 16, thereby facilitating the separation of the output shaft 12 and the fixed block 11. In the production process, the core-pulling block 3 with threaded portions 25 of different sizes can be replaced according to actual needs to improve practicality.

[0047] Reference Figure 8 and Fig. 9 In some embodiments, the inner core 32 is cylindrical, the minimum diameter of the fixing block 11 is larger than the diameter of the inner core 32, and the fixing block 11 is threadedly connected to the end of the inner core 32. A plurality of clamping plates 19 are rotatably connected to the inner core 32 through a torsion spring, and the angle formed by the clamping plates 19 and the insertion direction of the inner core 32 is an obtuse angle, and each clamping plate 19 is distributed at intervals along the length direction of the inner core 32. As shown in the figure, in this embodiment, the direction in which the inner core 32 is inserted into the outer core 31 is horizontally to the left, that is, gradually inserted from the right end of the outer core 31 to the left end. A plurality of clamping grooves 20 are also provided on the inner wall of the outer core 31, and the number of the clamping grooves 20 corresponds to the number of the clamping plates 19. When the inner core 32 is inserted into the outer core 31, the clamping plates 19 will first rotate and finally be clamped on each clamping groove 20 respectively. Among them, the clamping plates 19 are also distributed at intervals along the circumference of the inner core 32.

[0048] When the inner core 32 needs to be installed on the outer core 31, align the end of the inner core 32 away from the fixing block 11 with the outer core 31, and then gradually insert it into the inner part of the outer core 31. During the insertion process, each clamping plate 19 will rotate due to the blockage of the inner wall of the outer core 31, and the clamping plate 19 will rotate to fit the outer surface of the inner core 32. When one end of the inner core 32 is seen to extend from the end where the threaded portion 25 of the outer core 31 is located, stop applying thrust to the inner core 32, and each clamping plate 19 will be simultaneously clamped in each slot 20. Subsequently, the fixing block 11 is screwed to the end of the inner core 32 away from the threaded portion 25 to prevent the inner core 32 from being separated from the other end of the outer core 31.

[0049] During the insertion process, since the card plate 19 can only rotate in one direction and has a reset function (that is, the angle formed by the rotation direction of the card plate 19 and the insertion direction is always an obtuse angle, combined with the attached Fig. 9, in this embodiment, the rotation direction of the card plate 19 is clockwise), after the card plate 19 is inserted into the card slot 20, the inner core 32 can only be pulled out from the end where the threaded portion 25 of the outer core 31 is located along the insertion direction (horizontally to the left), and cannot be pulled out from the end where the fixed block 11 is located. In this way, when the rotating motor 43 controls the rotation of the inner core 32, the inner core 32 and the outer core 31 will not be separated. At the same time, it does not affect the detachability of the inner core 32 and the outer core 31. When the inner core 32 needs to be removed from the outer core 31, the fixed block 11 can be removed from the inner core 32 first, and then the external force can be continued to be applied to the inner core 32, so that the inner core 32 moves linearly in the direction away from the rotating motor 43 (i.e. horizontally to the left), thereby pulling out the inner core 32.

[0050] Reference Figure 2 In addition, a wedge block 21 and a hinge column 22 are installed on the fixed mold 1. The wedge block 21 is connected to the fixed mold 1 by sliding in the horizontal direction and is used to seal the injection cavity 5. A strip groove 23 is provided on the fixed mold 1, and the strip groove 23 is located below the wedge block 21. One end of the hinge column 22 is hinged in the strip groove 23, and the other end obliquely passes through the wedge block 21. When the injection mold is in the injection state, the hinge column 22 tilts upward in the direction close to the center of the fixed mold 1, and the movable mold 2 is pressed against the hinge column 22. After the movable mold 2 and the fixed mold 1 are molded together, the movable mold 2 will generate a vertical downward pressure on the inclined hinge column 22, so that the wedge block 21 has a movement tendency in the direction close to the center of the fixed mold 1, so that the wedge block 21 abuts against the peripheral side of the injection cavity 5, and the injection cavity 5 is sealed.

[0051] Among them, the end of the hinge column 22 away from the strip groove 23 is integrally connected with a pressing portion 24, the peripheral side of the pressing portion 24 is smoothly transitioned, and the outer diameter of the pressing portion 24 is larger than the outer diameter of the hinge column 22. In this embodiment, the hinge column 22 and the wedge block 21 are provided in several groups. After the movable mold 2 and the fixed mold 1 are separated from each other, the thumb of the staff can be pressed on the pressing portion 24, and the other four fingers hold the hinge column 22, and then apply tension to the hinge column 22, driving the wedge block 21 to move in a direction away from the center of the fixed mold 1, so that the staff can take out the molded product in the injection cavity 5.

[0052] The implementation principle of a locking joint injection mold in an embodiment of the present application is: during injection molding, the movable mold 2 is controlled to move in a direction close to the fixed mold 1, so that the fixed mold 1 and the movable mold 2 are molded together, and then the material is injected from the injection port 6 into the injection cavity 5 for molding.

[0053] After the injection molding process is completed, the rotary motor 43 is started, which drives the core-pulling block 3 to rotate; at the same time, the linear cylinder 41 guides the slide 42 to move linearly in the horizontal direction, thereby driving the rotary motor 43 and the core-pulling block 3 away from the injection molding cavity 5, so as to safely pull the core-pulling block 3 out of the molded product. By adopting the rotary extraction technology, the core-pulling operation can be performed on the molded product without damaging the internal thread, thereby ensuring the quality of the product.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A locking joint injection mold, characterized in that: The invention comprises a fixed mold (1), a movable mold (2), a core pulling block (3) and a core pulling mechanism (4), wherein the movable mold (2) and the fixed mold (1) are arranged relative to each other in the upper and lower parts, the movable mold (2) is movably arranged and is located above the fixed mold (1), an injection cavity (5) is provided on the fixed mold (1), and an injection port (6) is provided on the movable mold (2), and when the movable mold (2) and the fixed mold (1) are closed, the injection port (6) and the injection cavity (5) are connected; the core pulling block (3) is movably arranged on the fixed mold (1) and is located in the injection cavity (5); the core pulling mechanism (4) is arranged on the fixed mold (1) and is connected to the core pulling block (3) and is used for pulling the core pulling block (3) out of the injection cavity (5); The core pulling mechanism (4) comprises a linear cylinder (41), a slide (42) and a rotary motor (43); the slide (42) is movably arranged in a horizontal direction; the linear cylinder (41) is connected to the slide (42) and is used to control the linear movement of the slide (42); the rotary motor (43) is arranged on the slide (42); the rotary motor (43) is connected to the core pulling block (3) and is used to control the rotation of the core pulling block (3); the output shaft (12) of the rotary motor (43) has a self-locking function; the output shaft (12) of the rotary motor (43) is detachably connected to the core pulling block (3); The core-pulling block (3) comprises an outer core (31) and an inner core (32); the outer core (31) is hollow; one end of the outer core (31) is provided with a threaded portion (25); the threaded portion (25) is used to form a threaded hole; the inner core (32) is detachably connected to the outer core (31); and the rotating motor (43) is detachably connected to the inner core (32).

2. The locking joint injection mold according to claim 1, characterized in that: It also includes a fastening bolt (14) and a fastening nut (15); a fixing block (11) is provided at one end of the inner core (32) close to the rotating motor (43); a slot (13) is provided on the fixing block (11); the output shaft (12) is inserted into the slot (13); the fastening bolt (14) passes through the fixing block (11) and the output shaft (12) at the same time; and the fastening nut (15) is screwed onto the fastening bolt (14).

3. The locking joint injection mold according to claim 2, characterized in that: A groove (16) is provided at the end of the output shaft (12), a spring (17) and a trapezoidal block (18) are connected in the groove (16), two ends of the spring (17) are connected to the output shaft (12) and the trapezoidal block (18), respectively, and the elastic force direction of the spring (17) is perpendicular to the output shaft (12); the trapezoidal block (18) is slidably connected to the side wall of the groove (16), and the moving direction of the trapezoidal block (18) is parallel to the elastic force direction of the spring (17); when the spring (17) is in a natural state, the upper bottom of the trapezoidal block (18) is located outside the groove (16); a sink groove (26) is provided in the slot (13), and when the output shaft (12) is inserted into the slot (13), the spring (17) is in a compressed state, and the upper bottom of the trapezoidal block (18) is clamped in the sink groove (26).

4. The locking joint injection mold according to claim 2, characterized in that: The diameter of the fixing block (11) is larger than the diameter of the inner core (32); the fixing block (11) is threadedly connected to the inner core (32); a plurality of clamping plates (19) are rotatably connected to the inner core (32); the included angle formed by the clamping plates (19) and the insertion direction of the inner core (32) is an obtuse angle; the clamping plates (19) are spaced apart along the length direction of the inner core (32); a plurality of clamping grooves (20) are formed on the inner wall of the outer core (31); when the inner core (32) is inserted into the outer core (31), the clamping plates (19) are first rotated and finally clamped in the clamping grooves (20) respectively.

5. The locking joint injection mold according to claim 1, characterized in that: The clamping plates (19) are also distributed at intervals along the circumference of the inner core (32).

6. The locking joint injection mold according to claim 1, characterized in that: The fixed mold (1) is connected to a plurality of positioning columns (7), and the positioning columns (7) are spaced apart from each other. The movable mold (2) is connected to a plurality of positioning cylinders (8), and the positioning cylinders (8) are provided with positioning grooves (9), and the positioning grooves (9) correspond to the positioning columns (7) in a vertical manner.

7. The locking joint injection mold according to claim 6, characterized in that: The outer surface of the positioning column (7) is provided with a plurality of friction patterns (10).

8. The locking joint injection mold according to claim 1, characterized in that: It also comprises a wedge block (21) and a hinge column (22), wherein the wedge block (21) is slidably connected to the fixed mold (1) in a horizontal direction and is used to seal the injection cavity (5); a strip groove (23) is provided on the fixed mold (1), and the strip groove (23) is located below the wedge block (21); one end of the hinge column (22) is hinged in the strip groove (23), and the other end passes through the wedge block (21); when the injection mold is in an injection state, the hinge column (22) tilts upward in a direction close to the center of the fixed mold (1), and the movable mold (2) is pressed against the hinge column (22).

9. The locking joint injection mold according to claim 8, characterized in that: It also comprises a pressing portion (24), the pressing portion (24) being arranged at one end of the hinge column (22) away from the strip groove (23), the circumference of the pressing portion (24) being in a smooth transition, and the outer diameter of the pressing portion (24) being greater than the outer diameter of the hinge column (22).

10. The locking joint injection mold according to claim 9, characterized in that: The hinged columns (22) and the wedge blocks (21) are provided in a plurality of groups.

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