Plastic injection mold mechanical counter locking mechanism with inner pumping oil cylinder mold locking structure and use method of plastic injection mold mechanical counter locking mechanism

Abstract

The invention relates to the technical field of injection molds, and particularly discloses an injection mold mechanical counter locking mechanism with an inner pumping oil cylinder mold locking structure and a using method.The injection mold mechanical counter locking mechanism comprises a first mold base, a second mold base and a hydraulic rod, and the sides, close to each other, of the second mold base and the first mold base are fixedly provided with a second mold and a first mold correspondingly so as to conduct injection molding on a workpiece; the side wall of an output shaft of the hydraulic rod is provided with a locking mechanism and a monitoring mechanism, the monitoring mechanism and the locking mechanism are matched to lock and monitor movement of the second die holder, the monitoring mechanism detects the force of the second die holder abutting against the first die holder, and therefore whether the first die and the second die are tightly attached or not is determined; and the locking mechanism is used for locking back-off of the second mold base and the second mold, so that back-off of the second mold base and the second mold after hot melt liquid with relatively high pressure is subsequently input into the first mold and the second mold is avoided, the mold embedding stability is ensured, and the actual injection molding quality is improved.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to a mechanical anti-locking mechanism for injection molds with an internal oil-pulling cylinder locking structure and its usage method. Background Technology

[0002] The core function of the mechanical anti-locking mechanism of the injection mold with internal oil cylinder locking structure is to fix the slider through a mechanical anti-locking device (such as a locking block) during mold closing, to prevent the slider from being displaced due to injection pressure, thereby ensuring mold accuracy and product quality.

[0003] CN222135839U discloses a locking mechanism for a large-area hydraulic cylinder core pulling, which aims to improve the mold function by adding a lateral auxiliary locking mechanism to share the locking pressure at the inner pulling part.

[0004] Based on existing technologies, the following problems exist: Existing mechanical anti-locking mechanisms for injection molds typically achieve locking by adding an auxiliary locking mechanism. This results in a complex structure, and the locking still relies on the extension and retraction of hydraulic rods, leading to unstable locking. Referring to the aforementioned application documents, these mechanisms only add a lateral auxiliary locking mechanism to share the locking pressure at the inner extraction component, but they cannot monitor and lock the mold base after locking. Furthermore, the inability to monitor in real-time, coupled with the purely mechanical locking method, makes it difficult to detect the force during demolding, potentially leading to excessive demolding force and damage to the workpiece. Therefore, this paper proposes a mechanical anti-locking mechanism for injection molds with an inner extraction hydraulic cylinder locking structure and its usage method. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a mechanical locking mechanism for injection molds with an internal oil-pulling cylinder locking structure, comprising a base, and further comprising: The first mold base is fixedly mounted on the top of the base. The top of the base is fixedly mounted with a mounting seat. Positioning rods are fixedly mounted at the corners of the side walls of both the mounting seat and the first mold base. The second mold base is sleeved on the side wall of the positioning rod and located between the first mold base and the mounting base. The movement of the second mold base is limited by the positioning rod. The second mold and the first mold are respectively fixed on the side of the second mold base and the first mold base that are close to each other, so as to perform injection molding on the workpiece. A hydraulic rod is fixedly mounted on the side of the mounting base near the second mold base. A locking mechanism and a monitoring mechanism are provided on the side wall of the hydraulic rod's output shaft. These mechanisms cooperate to lock and monitor the movement of the second mold base. The monitoring mechanism includes: The first ring body is fixedly sleeved on the side wall of the hydraulic rod telescopic shaft. The side wall of the first ring body is provided with a monitoring component arranged in a ring array, and the monitoring component is located on the side wall of the positioning rod.

[0006] Furthermore, the monitoring component includes: A connecting plate is fixedly mounted on the side wall of the first ring body, and the side of the connecting plate away from the first ring body is sleeved on the side wall of the positioning rod. A connecting cylinder is fixedly mounted on the side of the connecting plate near the second mold base. A first connecting ring is fixedly mounted on the side of the connecting cylinder away from the connecting plate. The inner wall of the first connecting ring and the connecting cylinder are both sleeved on the side wall of the positioning rod, and the outer diameter of the first connecting ring is larger than the inner diameter of the connecting cylinder.

[0007] Furthermore, the monitoring component also includes: The connecting seat is fixedly disposed on the side of the second mold base away from the first mold base and near the end corner. A first groove is formed on the side of the connecting seat away from the second mold base, and a second groove is formed on the inner wall of the first groove. The inner wall diameter of the second groove is larger than the inner wall diameter of the first groove, so as to fit against the outer wall of the first connecting ring and the connecting cylinder respectively. A pressure sensor is fitted onto the inner wall of the second groove, and an elastic rubber ring is fitted onto the inner wall of the second groove between the first connecting ring and the pressure sensor.

[0008] Furthermore, the monitoring component also includes: The second connecting ring is sleeved on the inner wall of the second groove. The outer wall of the second connecting ring fits against the inner wall of the second groove. An auxiliary component arranged in a ring array is provided between the second connecting ring and the first connecting ring and outside the pressure sensor. The second connecting ring, the pressure sensor and the elastic rubber ring are all sleeved on the outer wall of the connecting cylinder. The inner wall of the second groove has space for the first connecting ring to move along its axial direction.

[0009] Furthermore, the auxiliary component includes: The first rod is fixedly disposed on the side of the first connecting ring near the second connecting ring and located outside the pressure sensor. The first rod is provided with a third groove and a fourth groove at the end near the second connecting ring and inside the rod, respectively. The second rod is fixedly mounted on the side of the second connecting ring close to the first connecting ring and located outside the pressure sensor. A third rod is fixedly mounted on the side of the second rod away from the second connecting ring, and the side wall diameter of the third rod is smaller than that of the second rod.

[0010] Furthermore, the sidewall of the second rod is fitted into the third groove, and the interior of the third groove provides space for the second rod to move along its axial direction; The first rod body has a protruding ring plate fixed inside, so that the inner wall of the protruding ring plate fits against the side wall of the third rod body, thereby limiting the movement of the third rod body. A spring is sleeved on the side wall of the third rod body located in the third groove, and the spring is located between the second rod body and the protruding ring plate.

[0011] Furthermore, the third rod extends along the interior of the second rod into the fourth groove. The inner wall diameter of the fourth groove is larger than the side wall diameter of the third rod. A stop block is fixedly provided on the side wall of the third rod located in the fourth groove. The side wall diameter of the stop block fits with the inner side wall of the fourth groove, and the interior of the fourth groove has space for the stop block to move along the axial direction of the third rod.

[0012] Furthermore, the locking mechanism includes: The second ring body is fixedly sleeved on the side wall of the hydraulic rod telescopic shaft and located on the side of the first ring body away from the second mold base. The outer wall of the second ring body is provided with locking components symmetrically arranged around the center point of the second ring body, and the locking components are located on the side wall of the positioning rod. The locking components include: A transmission gear plate is fixedly mounted on the outer wall of the second ring body. A rotating component is fixedly mounted on the top of the hydraulic rod. An internal threaded tube is rotatably mounted on the inner wall of the rotating component. An external threaded tube is threadedly connected to the inner wall of the internal threaded tube. The inner wall of the external threaded tube is slidably connected to the side wall of the positioning rod. The rotating component, the internal threaded tube, and the external threaded tube are coaxially designed and are all sleeved on the side wall of the positioning rod. The slides are arranged in a ring array on the side wall of the positioning rod. Each slide has a slider inside, and the outer side of each slider is fixedly connected to the inner wall of the external threaded tube.

[0013] Furthermore, the locking component also includes: The first gear is rotatably mounted on the top of the base and meshes with the top tooth groove of the transmission gear plate. The first gear is connected to a rotating shaft through a first bevel gear set. The rotating shaft is rotatably connected to the top of the base. A second bevel gear set is provided on the side wall of the rotating shaft so that the rotating shaft is connected to a second gear through the second bevel gear set. The second gear is rotatably connected to the top of the base. The third gear is fixedly sleeved on the outer wall of the internally threaded tube, and the third gear meshes with the second gear.

[0014] This invention also provides a method for using a mechanical locking mechanism for injection molds with an internal oil-sucking cylinder locking structure. The method, employing the aforementioned mechanical locking mechanism for injection molds with an internal oil-sucking cylinder locking structure, includes the following steps: S1: The second mold base and the second mold are moved by the telescopic shaft of the hydraulic rod so that the second mold can cooperate with the first mold to perform injection molding on the workpiece; S2: During the movement of the second mold base, the locking mechanism and the monitoring mechanism work together to lock and monitor the connection between the second mold base, the first mold and the first mold base.

[0015] This invention provides a mechanical locking mechanism for injection molds with an internal oil-pulling cylinder locking structure and its usage method. Compared with the prior art, it has the following advantages: 1. This invention uses a monitoring mechanism to detect the force of the second mold base pressing against the first mold base, thereby determining whether the first mold and the second mold are tightly fitted. Furthermore, a locking mechanism is used to lock the retraction of the second mold base and the second mold, preventing the second mold base and the second mold from retracting after high-pressure hot melt liquid is subsequently input into the first mold and the second mold. This ensures the stability of the mold fitting and improves the quality of actual injection molding.

[0016] 2. The present invention uses a pressure sensor in the monitoring mechanism to facilitate monitoring of the tightness between the second mold base and the first mold base, and monitors it by means of a squeeze pressure sensor. When demolding is required after injection molding, the pressure sensor facilitates monitoring of the force at which the second mold separates from the first mold during demolding, and monitors it by means of a squeeze pressure sensor, which facilitates understanding of the demolding situation and thus facilitates actual demolding use.

[0017] 3. The present invention uses a locking mechanism to press the connecting seat, the first mold base and the first mold together. When the pressure inside the first mold and the second mold increases, the connecting seat has a certain amount of room to move relative to the first connecting ring due to the first groove and the second groove. The self-locking function of the thread makes it easy to lock the second mold base to limit its retraction. At the same time, the hydraulic rod drives the second mold base to move, and simultaneously locks the retraction of the first mold base. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall rear structure of the present invention; Figure 3 This is a schematic diagram of the monitoring mechanism and locking mechanism of the present invention; Figure 4 This is a top view schematic diagram of the mounting base, hydraulic rod, monitoring mechanism, and locking mechanism of the present invention. Figure 5 This is a schematic diagram of the monitoring component structure of the present invention; Figure 6 For the present invention Figure 5 A magnified structural diagram of A in the middle; Figure 7 This is a top view of the monitoring component of the present invention; Figure 8 For the present invention Figure 7A magnified structural diagram of B in the diagram; Figure 9 For the present invention Figure 8 A magnified structural diagram of C; Figure 10 This is a schematic diagram of the locking assembly and positioning rod structure of the present invention; Figure 11 This is a schematic diagram of the transmission gear plate and the second ring structure of the present invention.

[0019] The reference numerals in the above figures are as follows: 1. Base; 2. Positioning rod; 3. First mold base; 4. First mold; 5. Second mold base; 6. Locking mechanism; 7. Mounting base; 8. Protective cover; 9. Monitoring mechanism; 10. Second mold; 11. Hydraulic rod; 61. Second ring body; 62. Locking assembly; 621. Rotating component; 622. Transmission gear plate; 623. Slide groove; 624. External threaded pipe; 625. Internal threaded pipe; 626. First gear; 627. First bevel gear set; 628. Second bevel gear set; 629. Second gear; 6291. Third gear; 91. First ring body; 92. Monitoring component; 921. Connecting plate; 922. Elastic rubber ring; 923. Auxiliary component; 924. First connecting ring; 925. Second groove; 926. Connecting seat; 927. First groove; 928. Connecting cylinder; 929. Pressure sensor; 9291. Second connecting ring; 9231, Fourth groove; 9232, First rod; 9233, Protruding ring plate; 9234, Second rod; 9235, Third groove; 9236, Third rod; 9237, Stop block. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1, please refer to Figures 1-4 A mechanical locking mechanism for injection molds with an internal oil-sucking cylinder locking structure, including a base 1, and further including: The first mold base 3 is fixedly mounted on the top of the base 1. The top of the base 1 is fixedly mounted with a mounting base 7. Positioning rods 2 are fixedly mounted at the side corners of the mounting base 7 and the first mold base 3. The second mold base 5 is sleeved on the side wall of the positioning rod 2 and is located between the first mold base 3 and the mounting base 7. The movement of the second mold base 5 is limited by the positioning rod 2. The second mold 10 and the first mold 4 are respectively fixed on the side of the second mold base 5 and the first mold base 3 that are close to each other, so as to perform injection molding on the workpiece. A hydraulic rod 11 is fixedly mounted on the side of the mounting base 7 near the second mold base 5. A locking mechanism 6 and a monitoring mechanism 9 are provided on the side wall of the output shaft of the hydraulic rod 11. The monitoring mechanism 9 and the locking mechanism 6 cooperate to lock and monitor the movement of the second mold base 5. The monitoring mechanism 9 includes: The first ring body 91 is fixedly sleeved on the side wall of the telescopic shaft of the hydraulic rod 11. The side wall of the first ring body 91 is provided with a monitoring component 92 arranged in a ring array, and the monitoring component 92 is located on the side wall of the positioning rod 2.

[0022] In practice, the second mold base 5 and the second mold 10 are moved closer to the first mold base 3 and the first mold 4 by the telescopic shaft of the hydraulic rod 11, so that the second mold 10 is fitted with the first mold 4. After hot melt liquid is introduced into the first mold 4 and the second mold 10, the hot melt liquid is injected into the mold after cooling to form the specified workpiece.

[0023] When the hydraulic rod 11 pushes the second mold base 5 and the second mold 10 close to the first mold base 3 and the first mold 4, the monitoring mechanism 9 detects the force of the second mold base 5 pressing against the first mold base 3, thereby determining whether the first mold 4 and the second mold 10 are tightly fitted. The locking mechanism 6 locks the second mold base 5 and the second mold 10 to prevent them from retracting after high-pressure hot melt liquid is injected into the first mold 4 and the second mold 10. This ensures the stability of the mold fitting and improves the quality of the actual injection molding.

[0024] Please see Figures 5-9 The monitoring component 92 includes: The connecting plate 921 is fixedly disposed on the side wall of the first ring body 91, and the side of the connecting plate 921 away from the first ring body 91 is sleeved on the side wall of the positioning rod 2. The connecting cylinder 928 is fixedly disposed on the side of the connecting plate 921 near the second mold base 5. The side of the connecting cylinder 928 away from the connecting plate 921 is fixedly provided with a first connecting ring 924. The inner walls of the first connecting ring 924 and the connecting cylinder 928 are both sleeved on the side wall of the positioning rod 2, and the outer diameter of the first connecting ring 924 is larger than the inner diameter of the connecting cylinder 928.

[0025] The monitoring component 92 also includes: The connecting seat 926 is fixedly disposed on the side of the second mold base 5 away from the first mold base 3 and near the end corner. A first groove 927 is formed on the side of the connecting seat 926 away from the second mold base 5. A second groove 925 is formed on the inner wall of the first groove 927. The inner wall diameter of the second groove 925 is larger than the inner wall diameter of the first groove 927, so as to fit against the outer walls of the first connecting ring 924 and the connecting cylinder 928 respectively. The pressure sensor 929 is sleeved on the inner wall of the second groove 925, and an elastic rubber ring 922 is sleeved on the inner wall of the second groove 925 between the first connecting ring 924 and the pressure sensor 929.

[0026] The monitoring component 92 also includes: The second connecting ring 9291 is sleeved on the inner wall of the second groove 925. The outer wall of the second connecting ring 9291 fits against the inner wall of the second groove 925. An auxiliary component 923 arranged in a ring array is provided between the second connecting ring 9291 and the first connecting ring 924 and outside the pressure sensor 929. The second connecting ring 9291, the pressure sensor 929 and the elastic rubber ring 922 are all sleeved on the outer wall of the connecting cylinder 928. The inner wall of the second groove 925 leaves space for the first connecting ring 924 to move along its axial direction.

[0027] The auxiliary component 923 includes: The first rod 9232 is fixedly disposed on the side of the first connecting ring 924 near the second connecting ring 9291 and located outside the pressure sensor 929. The first rod 9232 is provided with a third groove 9235 and a fourth groove 9231 at the end near the second connecting ring 9291 and inside the rod 9232, respectively. The second rod 9234 is fixedly disposed on the side of the second connecting ring 9291 close to the first connecting ring 924 and located outside the pressure sensor 929. The third rod 9236 is fixedly disposed on the side of the second rod 9234 away from the second connecting ring 9291. The side wall diameter of the third rod 9236 is smaller than the side wall diameter of the second rod 9234.

[0028] The side wall of the second rod 9234 is fitted inside the third groove 9235, and the interior of the third groove 9235 provides space for the second rod 9234 to move along its axial direction. The first rod 9232 has a protruding ring plate 9233 fixedly installed inside, so that the inner wall of the protruding ring plate 9233 fits against the side wall of the third rod 9236, thereby limiting the movement of the third rod 9236. A spring is sleeved on the side wall of the third rod 9236 located in the third groove 9235, and the spring is located between the second rod 9234 and the protruding ring plate 9233.

[0029] The third rod 9236 extends along the interior of the second rod 9234 into the fourth groove 9231. The inner diameter of the fourth groove 9231 is larger than the side wall diameter of the third rod 9236. A stop block 9237 is fixedly provided on the side wall of the third rod 9236 located in the fourth groove 9231. The side wall diameter of the stop block 9237 fits against the inner side wall of the fourth groove 9231, and the interior of the fourth groove 9231 leaves space for the stop block 9237 to move along the axial direction of the third rod 9236.

[0030] In specific implementation, when the telescopic shaft of the hydraulic rod 11 drives the first ring body 91 to approach the first mold base 3, the first ring body 91 drives the connecting plate 921 to move along the side wall of the positioning rod 2. The connecting plate 921 drives the connecting cylinder 928 and the first connecting ring 924 to move. After the first connecting ring 924 moves a certain distance in the second groove 925, it abuts against the connecting seat 926, thereby driving the connecting seat 926 and the second mold base 5 to move, so that the second mold base 5 and the second mold 10 move closer to the first mold base 3. At the same time, the first connecting ring 924 carries... The first rod 9232 and the raised ring plate 9233 move, and during the movement, the raised ring plate 9233 and the stop block 9237 work together to drive the third rod 9236 and the second rod 9234 to move, thereby driving the second connecting ring 9291 to move. The second connecting ring 9291 squeezes the pressure sensor 929 and the elastic rubber ring 922, so that the pressure sensor 929 can easily monitor the tightness of the second mold base 5 and the first mold base 3. The monitoring is carried out by squeezing the pressure sensor 929, which is convenient for actual use.

[0031] When demolding is required after injection molding, the hydraulic rod 11 moves in the opposite direction via its telescopic shaft. The connecting plate 921, connecting cylinder 928, and first connecting ring 924 move in the opposite direction. After the first connecting ring 924 resets, it presses against the elastic rubber ring 922 and squeezes the elastic rubber ring 922 and pressure sensor 929. The pressure sensor 929 can then monitor the force at which the second mold 10 separates from the first mold 4 during demolding, thus facilitating understanding of the demolding situation and making it easier for actual demolding use. During the process of the first connecting ring 924 squeezing the pressure sensor 929, the protruding ring plate 9233, the third groove 9235, and the fourth groove 9231 move on the side walls of the third rod 9236, the second rod 9234, and the stop block 9237, respectively, without affecting actual use.

[0032] Example 2, please refer to Figures 10-11 The technical difference between this embodiment and Embodiment 1 is that the locking mechanism 6 includes: The second ring body 61 is fixedly sleeved on the side wall of the telescopic shaft of the hydraulic rod 11 and is located on the side of the first ring body 91 away from the second mold base 5. The outer wall of the second ring body 61 is provided with locking components 62 symmetrically arranged around the center point of the second ring body 61, and the locking components 62 are located on the side wall of the positioning rod 2. The locking components 62 include: The transmission gear plate 622 is fixedly mounted on the outer wall of the second ring body 61. The top of the hydraulic rod 11 is fixedly mounted with a rotating part 621. The inner wall of the rotating part 621 is rotatably mounted with an internal threaded tube 625. The inner wall of the internal threaded tube 625 is threadedly connected with an external threaded tube 624. The inner wall of the external threaded tube 624 is slidably connected to the side wall of the positioning rod 2. The rotating part 621, the internal threaded tube 625 and the external threaded tube 624 are coaxially designed and are all sleeved on the side wall of the positioning rod 2. The slide grooves 623 are arranged in a ring array on the side wall of the positioning rod 2. Each slide groove 623 contains a slider, and the outer side of each slider is fixedly connected to the inner wall of the external threaded tube 624.

[0033] The locking component 62 further includes: The first gear 626 is rotatably mounted on the top of the base 1 and meshes with the top tooth groove of the transmission gear plate 622. The first gear 626 is connected to a rotating shaft through the first bevel gear set 627. The rotating shaft is rotatably connected to the top of the base 1. The side wall of the rotating shaft is provided with a second bevel gear set 628 so that the rotating shaft is connected to a second gear 629 through the second bevel gear set 628. The second gear 629 is rotatably connected to the top of the base 1. The third gear 6291 is fixedly sleeved on the outer wall of the internally threaded tube 625, and the third gear 6291 meshes with the second gear 629.

[0034] In practical implementation, when the telescopic shaft of the hydraulic rod 11 drives the second mold base 5 closer to the first mold base 3, the second ring body 61 drives the transmission gear plate 622 to move. During the movement of the transmission gear plate 622, the first gear 626 rotates. The first gear 626 drives the rotating shaft to rotate through the first bevel gear set 627. The rotating shaft drives the second gear 629 to rotate through the second bevel gear set 628. The second gear 629 drives the third gear 6291 and the internally threaded tube 625 to rotate. When the internally threaded tube 625 rotates, it drives the externally threaded tube 624 to move under the limitation of the slide groove 623 and the slider, thereby... The connecting plate 921, connecting cylinder 928, first connecting ring 924, connecting seat 926, first mold base 3 and first mold 4 are pressed together by the internal threaded tube 625. When the pressure in the first mold 4 and the second mold 10 increases, the connecting seat 926 has a certain amount of movement space relative to the first connecting ring 924 due to the first groove 927 and the second groove 925. The self-locking function of the thread makes it easy to lock the second mold base 5 to limit its retraction. At the same time, the hydraulic rod 11 drives the second mold base 5 to move, and simultaneously locks the retraction of the first mold base 3.

[0035] A protective cover 8 is fixedly provided on the top of the base 1 to shield the first gear 626, the second gear 629 and the first bevel gear set 627, etc., for easy use.

[0036] This invention also provides a method for using a mechanical locking mechanism for injection molds with an internal oil-sucking cylinder locking structure. The method includes the following steps: S1: The second mold base 5 and the second mold 10 are moved by the telescopic shaft of the hydraulic rod 11 so that the second mold 10 cooperates with the first mold 4, thereby performing injection molding on the workpiece; S2: During the movement of the second mold base 5, the locking mechanism 6 and the monitoring mechanism 9 work together to lock and monitor the connection between the second mold base 5, the first mold 4 and the first mold base 3 and the first mold 4.

[0037] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical locking mechanism for injection molds with an internal oil-sucking cylinder locking structure, comprising a base, characterized in that, Also includes: The first mold base is fixedly mounted on the top of the base. The top of the base is fixedly mounted with a mounting seat. Positioning rods are fixedly mounted at the corners of the side walls of both the mounting seat and the first mold base. The second mold base is sleeved on the side wall of the positioning rod and located between the first mold base and the mounting base. The movement of the second mold base is limited by the positioning rod. The second mold and the first mold are respectively fixed on the side of the second mold base and the first mold base that are close to each other, so as to perform injection molding on the workpiece. A hydraulic rod is fixedly mounted on the side of the mounting base near the second mold base. A locking mechanism and a monitoring mechanism are provided on the side wall of the hydraulic rod's output shaft. These mechanisms cooperate to lock and monitor the movement of the second mold base. The monitoring mechanism includes: The first ring body is fixedly sleeved on the side wall of the hydraulic rod telescopic shaft. The side wall of the first ring body is provided with a monitoring component arranged in a ring array, and the monitoring component is located on the side wall of the positioning rod.

2. The mechanical locking mechanism for injection molds with an internal oil-pulling cylinder locking structure according to claim 1, characterized in that, The monitoring components include: A connecting plate is fixedly mounted on the side wall of the first ring body, and the side of the connecting plate away from the first ring body is sleeved on the side wall of the positioning rod. A connecting cylinder is fixedly mounted on the side of the connecting plate near the second mold base. A first connecting ring is fixedly mounted on the side of the connecting cylinder away from the connecting plate. The inner wall of the first connecting ring and the connecting cylinder are both sleeved on the side wall of the positioning rod, and the outer diameter of the first connecting ring is larger than the inner diameter of the connecting cylinder.

3. The mechanical locking mechanism for injection molds with an internal oil-pulling cylinder locking structure according to claim 2, characterized in that, The monitoring component also includes: The connecting seat is fixedly disposed on the side of the second mold base away from the first mold base and near the end corner. A first groove is formed on the side of the connecting seat away from the second mold base, and a second groove is formed on the inner wall of the first groove. The inner wall diameter of the second groove is larger than the inner wall diameter of the first groove, so as to fit against the outer wall of the first connecting ring and the connecting cylinder respectively. A pressure sensor is fitted onto the inner wall of the second groove, and an elastic rubber ring is fitted onto the inner wall of the second groove between the first connecting ring and the pressure sensor.

4. The mechanical locking mechanism for injection molds with an internal oil-pulling cylinder locking structure according to claim 3, characterized in that, The monitoring component also includes: The second connecting ring is sleeved on the inner wall of the second groove. The outer wall of the second connecting ring fits against the inner wall of the second groove. An auxiliary component arranged in a ring array is provided between the second connecting ring and the first connecting ring and outside the pressure sensor. The second connecting ring, the pressure sensor and the elastic rubber ring are all sleeved on the outer wall of the connecting cylinder. The inner wall of the second groove has space for the first connecting ring to move along its axial direction.

5. The mechanical locking mechanism for injection molds with an internal oil-sucking cylinder locking structure according to claim 4, characterized in that, The auxiliary components include: The first rod is fixedly disposed on the side of the first connecting ring near the second connecting ring and located outside the pressure sensor. The first rod is provided with a third groove and a fourth groove at the end near the second connecting ring and inside the rod, respectively. The second rod is fixedly mounted on the side of the second connecting ring close to the first connecting ring and located outside the pressure sensor. A third rod is fixedly mounted on the side of the second rod away from the second connecting ring, and the side wall diameter of the third rod is smaller than that of the second rod.

6. The mechanical locking mechanism for injection molds with an internal oil-sucking cylinder locking structure according to claim 5, characterized in that, The sidewall of the second rod is fitted into the third groove, and the interior of the third groove provides space for the second rod to move along its axial direction. The first rod body has a protruding ring plate fixed inside, so that the inner wall of the protruding ring plate fits against the side wall of the third rod body, thereby limiting the movement of the third rod body. A spring is sleeved on the side wall of the third rod body located in the third groove, and the spring is located between the second rod body and the protruding ring plate.

7. The mechanical locking mechanism for injection molds with an internal oil-pulling cylinder locking structure according to claim 6, characterized in that, The third rod extends along the interior of the second rod into the fourth groove. The inner diameter of the fourth groove is larger than the side wall diameter of the third rod. A stop is fixedly provided on the side wall of the third rod located in the fourth groove. The side wall diameter of the stop fits with the inner side wall of the fourth groove, and the interior of the fourth groove has space for the stop to move along the axial direction of the third rod.

8. The mechanical locking mechanism for injection molds with an internal oil-pulling cylinder locking structure according to claim 1, characterized in that, The locking mechanism includes: The second ring body is fixedly sleeved on the side wall of the hydraulic rod telescopic shaft and located on the side of the first ring body away from the second mold base. The outer wall of the second ring body is provided with locking components symmetrically arranged around the center point of the second ring body, and the locking components are located on the side wall of the positioning rod. The locking components include: A transmission gear plate is fixedly mounted on the outer wall of the second ring body. A rotating component is fixedly mounted on the top of the hydraulic rod. An internal threaded tube is rotatably mounted on the inner wall of the rotating component. An external threaded tube is threadedly connected to the inner wall of the internal threaded tube. The inner wall of the external threaded tube is slidably connected to the side wall of the positioning rod. The rotating component, the internal threaded tube, and the external threaded tube are coaxially designed and are all sleeved on the side wall of the positioning rod. The slide grooves are arranged in a ring array on the side wall of the positioning rod. Each slide groove contains a slider, and the outer side of each slider is fixedly connected to the inner wall of the external threaded tube.

9. The mechanical locking mechanism for injection molds with an internal oil-pulling cylinder locking structure according to claim 8, characterized in that, The locking component further includes: The first gear is rotatably mounted on the top of the base and meshes with the top tooth groove of the transmission gear plate. The first gear is connected to a rotating shaft through a first bevel gear set. The rotating shaft is rotatably connected to the top of the base. A second bevel gear set is provided on the side wall of the rotating shaft so that the rotating shaft is connected to a second gear through the second bevel gear set. The second gear is rotatably connected to the top of the base. The third gear is fixedly sleeved on the outer wall of the internally threaded tube, and the third gear meshes with the second gear.

10. A method for using a mechanical anti-locking mechanism for an injection mold with an internal oil-pulling cylinder locking structure, characterized in that, The injection mold mechanical locking mechanism with an internal oil-pulling cylinder locking structure as described in any one of claims 1-9 includes the following steps: S1: The second mold base and the second mold are moved by the telescopic shaft of the hydraulic rod so that the second mold cooperates with the first mold to perform injection molding on the workpiece; S2: During the movement of the second mold base, the locking mechanism and the monitoring mechanism work together to lock and monitor the connection between the second mold base, the first mold and the first mold base.

Images