A terminal production mold

Abstract

This utility model relates to the technical field of precision parts processing equipment, specifically a terminal block production mold, including a frame, vertical plates, a lower mold base, a piston plate, a fixed shaft, and a transmission mechanism. An upper mold base is slidably mounted on the frame; two vertical plates are spaced apart on the frame, each with a first and second arc-shaped groove; the lower mold base is rotatably mounted on the vertical plates, with two forming grooves, a cavity, and a through hole; the piston plate is slidably mounted within the cavity, and an ejector pin is mounted on the piston plate, inserting into the corresponding forming groove; the fixed shaft is fixedly mounted on one of the vertical plates, with its other end inserted into the cavity, and a cam is mounted on the fixed shaft; the transmission mechanism connects the upper and lower mold bases. This utility model can quickly and automatically switch forming grooves to inject raw materials and eject the formed terminal block from the other forming groove, while simultaneously completing the preheating and cooling operations for both forming grooves. It has a simple structure and is time-saving and efficient.

Description

Technical Field

[0001] This utility model relates to the field of precision parts processing equipment, specifically to a terminal block production mold. Background Technology

[0002] Terminal blocks, as key components for electrical connections, are mostly made of insulating plastic. They are typically mass-produced through processes such as raw material melting, mold injection, and cooling. After molding, they are assembled with conductive metal cores and are widely used in home appliances, automobiles, industrial control and other fields.

[0003] With the increasing demand for terminal blocks, the industry's requirements for production efficiency and product quality are gradually rising. Existing technologies have made improvements to injection molds for terminal block housings. For example, Chinese patent CN218286531U discloses an injection mold for terminal block housing production that facilitates demolding. This mold, by optimizing the mold positioning and installation structure, solves the problem of time-consuming disassembly and assembly during traditional mold changes, which affects production line efficiency and improves the mold's versatility and ease of replacement to some extent. However, existing injection molds still have significant shortcomings in actual large-scale production, making it difficult to meet the demands of efficient and high-quality production.

[0004] After the existing molds are formed, the ejected molded terminals need to be manually transferred from the side of the mold to the collection device. This process not only increases labor costs but also causes production interruptions, making it impossible to achieve continuous operation of injection molding, forming, demolding, and collection, resulting in low production efficiency. Furthermore, the lack of phased thermal management makes it difficult to balance product quality and molding efficiency: existing molds do not have dedicated structures designed for "mold preheating before injection molding" and "cooling after molding." On the one hand, when high-temperature molten raw materials are directly injected into a cold mold, the large temperature difference between the mold and the raw material can easily cause violent heat exchange, resulting in a large number of bubbles inside the raw material, affecting the insulation performance and structural strength of the terminal shell. On the other hand, the molded terminals rely solely on natural cooling or simple air cooling, resulting in low cooling efficiency, prolonging the molding cycle, and further restricting production efficiency. Finally, poor coordination and insufficient operational stability are also issues: although some molds attempt to achieve demolding or mold switching through mechanical structures, they have not established a linkage logic between injection molding, demolding, and switching. This easily leads to problems such as mold misalignment during injection and inaccurate positioning of the molding groove after switching, resulting in raw material overflow or deviations in terminal molding dimensions, increasing the scrap rate. Utility Model Content

[0005] The purpose of this utility model is to provide a terminal block production mold that can achieve continuous operation, meet thermal management requirements, and operate stably, so as to solve the technical problems of reliance on manual labor, potential quality problems, and low efficiency.

[0006] This utility model is achieved through the following technical solution: a terminal block manufacturing mold, comprising: A frame, on which an upper mold base is slidably disposed, and on which a first drive assembly is disposed, driving the upper mold base to slide along the height direction of the frame; Vertical plates, two vertical plates are spaced apart on the frame and located below the upper mold base, and a first arc groove and a second arc groove are respectively provided on the adjacent side of the two vertical plates, the first arc groove and the second arc groove are coaxial; The lower mold base is rotatably mounted between two vertical plates. Two forming grooves are symmetrically arranged on the lower mold base about its rotation axis. A cavity is centrally located on the lower mold base, and four through holes communicating with the cavity are provided on the lower mold base. The four through holes are divided into upper and lower groups, with two through holes in each group. When the lower mold base is stationary, the two through holes in the upper layer are connected to the first arc groove on the corresponding side, and the two through holes in the lower layer are connected to the second arc groove on the corresponding side. Piston plates, including two piston plates, are slidably disposed in the cavity. The two piston plates correspond to two sets of through holes, one above the other. A ejector pin is provided on the piston plate and is inserted into the forming groove on the corresponding side. A fixed shaft is fixedly mounted on one of the vertical plates and coaxial with the first arc-shaped groove. The other end of the fixed shaft is inserted into the cavity. A cam is provided on the fixed shaft. The cam is located between two piston plates with its long end facing down. The upper mold base and the lower mold base are connected by a transmission mechanism. When the upper mold base drives the material in the molding groove to initially set and slides back to its original position, the transmission mechanism drives the lower mold base to rotate 180 degrees. When the upper mold base slides down to match the lower mold base for material injection, the lower mold base does not rotate.

[0007] The working principle of this technical solution is as follows: the first drive component provides linear power, driving the upper mold base to slide along the height direction of the frame, realizing the switching of the upper mold base and lower mold base closing for injection molding, and the upper mold base sliding up and resetting. The transmission mechanism converts the linear motion of the upper mold base into the rotational motion of the lower mold base, and only drives the lower mold base to rotate 180 degrees when the upper mold base slides up and resets, ensuring that the lower mold base is stationary during injection molding and avoiding material overflow. The double molding grooves of the lower mold base are symmetrical about the rotation axis, and with the cam on the fixed shaft, the lower molding groove is demolded synchronously when the upper molding groove is being injected, improving production continuity.

[0008] To better realize this utility model, a guide pipe for injecting raw materials into the forming groove is further provided through the upper mold base. The inlet end of the guide pipe is connected to an external raw material supply device, and the outlet end is set to correspond to the opening of the upper forming groove when the upper mold base slides down to adapt to the lower mold base. The inner diameter of the guide pipe is adapted to the feeding requirements of the forming groove.

[0009] To better realize this utility model, the first arc-shaped groove and the second arc-shaped groove are arranged in a ring array about their axis, and the arc length of the first arc-shaped groove and the second arc-shaped groove are adapted to the distribution range of the corresponding group of through holes when the lower mold base is stationary; the first arc-shaped groove can only be connected to the two through holes in the upper layer at the same time, and the second arc-shaped groove can only be connected to the two through holes in the lower layer at the same time. The through holes are located between the piston plate and the forming groove on the corresponding side, and the diameter of the through holes is adapted to the fluid transmission requirements of the first arc-shaped groove and the second arc-shaped groove.

[0010] To better realize this utility model, further, one of the vertical plates is provided with a hot air input pipe communicating with its first arc-shaped groove and a cold air input pipe communicating with its second arc-shaped groove. The input end of the hot air input pipe is connected to an external hot air generating device, and the input end of the cold air input pipe is connected to an external cold air generating device. The other vertical plate is provided with a hot air return pipe communicating with its first arc-shaped groove and a cold air return pipe communicating with its second arc-shaped groove. The output end of the hot air return pipe is connected to an external hot air recovery device, and the output end of the cold air return pipe is connected to an external cold air recovery device. The first arc-shaped groove is connected to the upper through hole for transmitting preheated hot air to the forming tank, and the second arc-shaped groove is connected to the lower through hole for transmitting cooling cold air to the forming tank.

[0011] To better realize this utility model, at least two guide rods are further provided in the cavity along the sliding direction perpendicular to the piston plate. The guide rods are symmetrically distributed on both sides of the cavity, and the guide rods penetrate the two piston plates vertically and are slidably connected to them. Two springs are sleeved on the guide rods, and the two springs correspond to the two piston plates respectively. One end of the spring abuts against the inner wall of the cavity, and the other end abuts against the side of the piston plate away from the cam on the corresponding side. The elastic coefficient of the spring is adapted to the reset requirement of the piston plate.

[0012] To better realize this utility model, further, when the upper piston plate contacts the outer peripheral surface of the short end of the cam, the upper end surface of the upper ejector pin is exactly flush with the bottom surface of the upper forming groove, and the upper forming groove can be injected with raw materials normally; and at this time, the lower piston plate abuts against the outer peripheral surface of the long end of the cam, and the lower end surface of the lower ejector pin is exactly flush with the opening edge of the lower forming groove, and the forming terminal in the lower forming groove can be disengaged from the forming groove along the ejector pin pushing direction.

[0013] To better realize this utility model, the transmission mechanism further includes a ratchet, ratchet teeth, and a rack. A mounting shaft coaxially fixed on the lower mold base and coaxial with the first arc-shaped groove is provided. One end of the mounting shaft extends out from a vertical plate near the transmission mechanism and is rotatably connected to the vertical plate via a bearing. The ratchet is coaxially fixedly connected to the mounting shaft, and a gear coaxially rotating with the mounting shaft is sleeved on the outside of the ratchet. The inner ring of the gear is spaced apart from the outer ring of the ratchet. A sliding groove is provided radially on the gear, and a spring rod is fixedly installed within the sliding groove. The fixed end of the spring rod is connected to the sliding groove. The inner wall on the side away from the ratchet is connected, with the movable end facing the ratchet; one end of the ratchet tooth is inserted into the slide groove and fixedly connected to the movable end of the spring rod, and the other end of the ratchet tooth meshes with the ratchet in one direction, and the meshing direction of the ratchet tooth is consistent with the direction in which the lower mold base needs to rotate; a guide sleeve is fixedly installed on the vertical plate, and the axis of the guide sleeve is set along the height direction of the frame; the rack is slidably connected to the guide sleeve and meshes with the gear; the top end of the rack is fixedly connected to the bottom of the upper mold base, and the length of the rack is adapted to the sliding stroke of the upper mold base and the transmission requirement that the lower mold base needs to rotate 180°.

[0014] To better realize this utility model, at least two positioning holes are further provided radially on the mounting shaft. The positioning holes are symmetrically distributed about the axis of the mounting shaft, and the positions of the positioning holes correspond to the required static position after the lower mold base rotates 180 degrees. A fixing seat is fixedly provided on the vertical plate, and the position of the fixing seat corresponds to the distribution range of the positioning holes. A slider is slidably provided on the fixing seat radially along the mounting shaft. A positioning pin is fixedly provided on one side of the slider. The axis of the positioning pin is collinear with the axis of the positioning hole. The positioning pin is inserted into the positioning hole and slidably connected to its inner wall. The outer diameter of the positioning pin is adapted to the inner diameter of the positioning hole. Furthermore, a second driving component is provided on the fixing seat to drive the slider to slide radially along the mounting shaft. The action of the second driving component is linked with the action of the transmission mechanism to drive the lower mold base to rotate, so as to drive the positioning pin to disengage from the positioning hole when the lower mold base rotates, and drive the positioning pin to insert into the positioning hole after the lower mold base rotates to the correct position.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects: (1) This utility model symmetrically sets two molding grooves about the rotation axis on the lower mold base, and coordinates the transmission mechanism with the upper mold base: when the upper mold base drives the raw material in the upper molding groove to initially set and slide back to its original position, the transmission mechanism can precisely drive the lower mold base to rotate 180 degrees, so that the original upper molding groove (including the set material) is transferred to the lower layer for cooling and demolding, and the original lower empty molding groove is transferred to the upper layer for injection molding. At the same time, the cam on the fixed shaft cooperates with the piston plate and ejector pin to automatically eject the molding terminal in the lower molding groove during the rotation of the lower mold base, without the need for manual transfer. This design realizes semi-automatic continuous operation of injection molding, preheating, cooling, demolding and switching, avoids production interruption caused by manual intervention, and improves production efficiency compared with existing molds; (2) This utility model constructs a phased thermal management system to prevent air bubbles during preheating before injection molding. One of the vertical plates has a hot air input pipe connected to the first arc groove, which can introduce 60-80°C preheated hot air to the periphery of the upper molding groove. The hot air acts on the molding groove through the upper through hole, making the mold temperature close to the melting temperature of the raw material, greatly reducing the temperature difference and avoiding air bubbles caused by thermal shock when the raw material is injected. The cold air input pipe on the same vertical plate is connected to the second arc groove, which can introduce 5-15°C cooling cold air to the periphery of the lower molding groove. The cold air quickly carries away the heat of the molding terminal through the lower through hole, while ensuring that the terminal shell is cooled evenly and avoiding warping deformation caused by uneven cooling. The hot air return pipe and cold air return pipe on the other vertical plate can recover the heat exchanged hot air and cold air to the corresponding external device to realize energy recycling. (3) In this utility model, the rack drives the ratchet and the lower mold base to rotate 180 degrees through the gear and ratchet; when the upper mold base slides down to close the mold for injection, the ratchet and ratchet disengage, and the lower mold base remains stationary, effectively avoiding the overflow of raw materials caused by mold displacement during injection; symmetrical positioning holes are set on the mounting shaft, the fixed seat, slider and positioning pin on the vertical plate cooperate, and the second drive component is linked with the transmission mechanism to ensure that the molding groove can be accurately aligned with the upper mold base after each switch; the guide rods in the cavity are symmetrically distributed and vertically penetrate the piston plate, restricting the piston plate to slide only in the vertical direction, and avoiding the piston plate tilting when the cam pushes; at the same time, the spring can push the piston plate to quickly reset after the cam disengages, ensuring that the ejector pin can accurately return to the position flush with the bottom surface of the molding groove after each demolding, avoiding terminal scratches or molding groove damage caused by ejector pin misalignment; (4) The core components of this utility model are all manufactured using conventional machining processes. The component connection method is mature and reliable, without complex or special structures. Disassembly and assembly are convenient during later maintenance, reducing equipment maintenance costs. At the same time, by adjusting the shape and size of the forming groove and the inner diameter of the guide tube, it can be adapted to the production of terminal shells of different specifications without the need to replace the entire mold frame, thus improving the versatility and cost-effectiveness of the mold. Attached Figure Description

[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the connection structure between the vertical plate and the cam in this utility model. Figure 3 This is a schematic diagram of the connection structure of each component on the lower mold base in this utility model; Figure 4 This is a schematic diagram of the connection structure between the limiting mechanism and the vertical plate in this utility model.

[0017] Wherein: 1—frame, 2—upper mold base, 3—guide pipe, 4—hydraulic cylinder, 5—vertical plate, 51—first arc groove, 52—second arc groove, 6—hot air input pipe, 7—cold air input pipe, 8—hot air return pipe, 9—cold air return pipe, 10—lower mold base, 1001—forming groove, 1002—cavity, 1003—through hole, 11—guide rod, 12—piston plate, 13—ejector pin, 14—spring, 15—mounting shaft, 151—positioning hole, 16—ratchet, 17—gear, 18—rabbit tooth, 19—guide sleeve, 20—rack, 21—fixed shaft, 22—cam, 23—fixed seat, 24—slider, 25—positioning pin, 26—permanent magnet, 27—electromagnet. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly including one or more of the feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example 1: The main structure of this embodiment is as follows: Figures 1-4 As shown, it includes: A frame 1, on which an upper mold base 2 is slidably disposed, and a first drive assembly is disposed on the frame 1 to drive the upper mold base 2 to slide along the height direction of the frame 1; Vertical plates 5, two vertical plates 5 are spaced apart on the frame 1 and located below the upper mold base 2. A first arc groove 51 and a second arc groove 52 are respectively provided on the adjacent side of the two vertical plates 5. The first arc groove 51 and the second arc groove 52 are coaxial. The lower mold base 10 is rotatably disposed between two vertical plates 5. Two forming grooves 1001 are symmetrically arranged on the lower mold base 10 about its rotation axis. A cavity 1002 is centrally disposed on the lower mold base 10, and four through holes 1003 communicating with the cavity 1002 are provided on the lower mold base 10. The four through holes 1003 are divided into upper and lower groups, with two through holes 1003 in each group. When the lower mold base 10 is stationary, the two through holes 1003 in the upper layer are connected to the first arc groove 51 on the corresponding side, and the two through holes 1003 in the lower layer are connected to the second arc groove 52 on the corresponding side. Piston plate 12, including two piston plates 12, both piston plates 12 are slidably disposed in cavity 1002, the two piston plates 12 are respectively corresponding to two sets of through holes 1003, and ejector pins 13 are provided on piston plates 12, the ejector pins 13 are inserted into the forming groove 1001 on the corresponding side; A fixed shaft 21 is fixedly mounted on one of the vertical plates 5 and coaxial with the first arc-shaped groove 51. The other end of the fixed shaft 21 is inserted into the cavity 1002. A cam 22 is provided on the fixed shaft 21. The cam 22 is located between the two piston plates 12 and its long end faces downward. The transmission mechanism connects the upper mold base 2 and the lower mold base 10. When the upper mold base 2 drives the material in the molding groove 1001 to initially set and slide back to its original position, the transmission mechanism drives the lower mold base 10 to rotate 180 degrees. When the upper mold base 2 slides down to match the lower mold base 10 for material injection, the lower mold base 10 does not rotate.

[0022] The specific implementation process is as follows: The lower mold base 10 is stationary. The two upper through holes 1003 are connected to the first arc groove 51 of the vertical plate 5, and the two lower through holes 1003 are connected to the second arc groove 52. The two piston plates 12 are located on the upper and lower sides of the cavity 1002, and the ejector pins 13 are inserted into the corresponding forming grooves 1001. The first drive assembly is started, pushing the upper mold base 2 to slide down along the frame 1 until the upper mold base 2 and the lower mold base 10 are closed. At this time, the transmission mechanism does not move, the lower mold base 10 remains stationary, and molten raw materials are injected into the upper forming groove 1001 through the external raw material supply device.

[0023] After the raw material is injected, it is kept in the mold-closed state for a period of time, which is set according to the characteristics of the raw material, such as 20-30 seconds, so that the raw material is initially shaped in the molding groove 1001 to avoid deformation of the raw material during subsequent rotation. The first drive component drives the upper mold base 2 to slide up and reset along the frame 1. The upper mold base 2 drives the lower mold base 10 to rotate 180 degrees around the rotation axis through the transmission mechanism. During the rotation, the original upper molding groove 1001 containing the initially shaped raw material is transferred to the lower layer, and the original lower molding groove 1001 with empty slots is transferred to the upper layer. After the lower mold base 10 is rotated into place, the long end of the cam 22 pushes the lower piston plate 12 to slide. The piston plate 12 drives the ejector pin 13 to push out the shaping terminal in the lower molding groove 1001. At the same time, the upper piston plate 12 contacts the short end of the cam 22, and the ejector pin 13 is reset to be flush with the bottom surface of the upper molding groove 1001, ready for the next mold closing injection, completing one production cycle.

[0024] Example 2: This embodiment, based on the above embodiment, further adds a guide tube 3, such as... Figure 1As shown, a guide pipe 3 for injecting raw material into the molding groove 1001 is provided through the upper mold base 2. The inlet end of the guide pipe 3 is connected to an external raw material supply device, and the outlet end is set to correspond to the opening of the upper molding groove 1001 when the upper mold base 2 slides down to adapt to the lower mold base 10. The inner diameter of the guide pipe 3 is adapted to the feeding requirements of the molding groove 1001. The guide pipe 3 passes through the upper mold base 2, and the inlet end is connected to the external raw material supply device to ensure stable transmission of molten raw material. The outlet end corresponds to the opening position of the upper molding groove 1001 when the upper mold base 2 is closed, to prevent the raw material from deviating from the molding groove 1001 during injection. The inner diameter of the guide pipe 3 is designed according to the volume of the molding groove 1001 and the injection time requirements to avoid the inner diameter being too small, which would cause injection timeout, or the inner diameter being too large, which would cause raw material overflow.

[0025] The specific implementation process is as follows: The guide tube 3 is passed through the upper mold base 2 in a vertical direction to ensure that the central axis of the discharge end of the guide tube 3 is collinear with the central axis of the upper forming groove 1001 when the upper mold base 2 is closed; the feed end is sealed to the discharge port of the external raw material supply device through a flange or quick connector to prevent raw material leakage. When the first drive component pushes the upper mold base 2 and the lower mold base 10 into place, the external raw material supply device is started. The molten raw material enters through the feed end of the guide pipe 3 and is precisely injected into the upper forming groove 1001 through the discharge end. The feeding time of the guide pipe 3 is set according to the volume of the forming tank 1001. After feeding is completed, the raw material supply device stops feeding. The raw material remaining in the guide pipe 3 is prevented from solidifying by subsequent heating and heat preservation to ensure smooth feeding next time. Except for the above-mentioned operation of the guide pipe 3, the other parts of this embodiment are the same as those in the above embodiment, and will not be described again.

[0026] Example 3: This embodiment, based on the above embodiment, further defines the structural and positional relationship between the first arc-shaped groove 51 and the second arc-shaped groove 52, such as... Figure 2As shown, the first arc-shaped groove 51 and the second arc-shaped groove 52 are arranged in a ring array about their axis, and the arc length of the first arc-shaped groove 51 and the second arc-shaped groove 52 is adapted to the distribution range of the corresponding group of through holes 1003 when the lower mold base 10 is stationary; the first arc-shaped groove 51 can only be connected to the two through holes 1003 in the upper layer at the same time, and the second arc-shaped groove 52 can only be connected to the two through holes 1003 in the lower layer at the same time. The through holes 1003 are located between the piston plate 12 and the forming groove 1001 on the corresponding side, and the diameter of the through holes 1003 is adapted to the fluid transmission requirements of the first arc-shaped groove 51 and the second arc-shaped groove 52. The arc lengths of the first arc groove 51 and the second arc groove 52 are adapted to the distribution range of the corresponding through holes 1003 when the lower mold base 10 is stationary, ensuring that the arc grooves can completely cover the corresponding through holes 1003 when the lower mold base 10 is stationary, thus avoiding fluid leakage. The first arc groove 51 is only connected to the two upper through holes 1003, and the second arc groove 52 is only connected to the two lower through holes 1003. The through holes 1003 are located between the piston plate 12 and the forming groove 1001, so that the subsequent hot and cold air can directly act on the periphery of the forming groove 1001, thereby improving the heat exchange efficiency.

[0027] The specific implementation process is as follows: A first arc-shaped groove 51 and a second arc-shaped groove 52 are machined on the side of the two vertical plates 5 that are close to each other, ensuring that the first arc-shaped groove 51 and the second arc-shaped groove 52 are arranged in a ring array about the rotation axis of the lower mold base 10. The depth and width of the arc-shaped grooves are designed according to the diameter of the through hole 1003 to ensure that the fluid can pass through smoothly. The lower mold base 10 is installed between the two vertical plates 5, and the position of the lower mold base 10 is adjusted to a stationary state. Check whether the two upper through holes 1003 are completely aligned and connected with the first arc-shaped groove 51. The airtightness can be tested by introducing compressed air. Check whether the two lower through holes 1003 are completely aligned and connected with the second arc-shaped groove 52. If there is a deviation, adjust the installation position of the vertical plate 5 or the lower mold base 10.

[0028] When the lower mold base 10 is stationary, the arc-shaped groove and the through hole 1003 remain in a continuous state; during rotation, the arc-shaped groove and the through hole 1003 are temporarily disconnected, and then reconnected after rotation to the correct position, ensuring that fluid is transported only when heat exchange is required. The other parts of this embodiment are the same as those in the above embodiment, and will not be described again.

[0029] Example 4: This embodiment further defines the structure of the vertical plate 5 based on the above embodiments, such as... Figures 1-4As shown, one of the vertical plates 5 is provided with a hot air input pipe 6 connected to its first arc-shaped groove 51 and a cold air input pipe 7 connected to its second arc-shaped groove 52. The input end of the hot air input pipe 6 is connected to an external hot air generating device, and the input end of the cold air input pipe 7 is connected to an external cold air generating device. The other vertical plate 5 is provided with a hot air return pipe 8 connected to its first arc-shaped groove 51 and a cold air return pipe 9 connected to its second arc-shaped groove 52. The output end of the hot air return pipe 8 is connected to an external hot air recovery device, and the output end of the cold air return pipe 9 is connected to an external cold air recovery device. The first arc-shaped groove 51 is connected to the upper through hole 1003 to transmit preheated hot air to the forming groove 1001, and the second arc-shaped groove 52 is connected to the lower through hole 1003 to transmit cooling cold air to the forming groove 1001. The hot gas input pipe 6 guides the hot gas generated by the external hot gas generator into the first arc-shaped groove 51. The hot gas acts on the periphery of the upper forming groove 1001 through the upper through hole 1003, making the mold temperature close to the temperature of the molten material, reducing the temperature difference, and preventing bubbles from being generated due to a sudden drop in temperature when the material is injected. The cold gas input pipe 7 guides the cold gas generated by the external cold gas generator into the second arc-shaped groove 52. The cold gas acts on the periphery of the lower forming groove 1001 through the lower through hole 1003, accelerating the cooling and solidification of the molded part and shortening the molding time. The hot gas return pipe 8 recovers the hot gas after heat exchange in the first arc-shaped groove 51 to the external hot gas recovery device, and the cold gas return pipe 9 recovers the cold gas after heat exchange in the second arc-shaped groove 52 to the external cold gas recovery device, realizing energy recycling and reducing energy consumption.

[0030] The specific implementation process is as follows: Two through holes are machined on one of the vertical plates 5 to install a hot air inlet pipe 6 and a cold air inlet pipe 7, respectively, ensuring that the hot air inlet pipe 6 is sealed and connected to the first arc-shaped groove 51 and the cold air inlet pipe 7 is sealed and connected to the second arc-shaped groove 52. Two through holes are machined on the other vertical plate 5 to install a hot air return pipe 8 and a cold air return pipe 9, respectively, ensuring that the hot air return pipe 8 is sealed and connected to the first arc-shaped groove 51 and the cold air return pipe 9 is sealed and connected to the second arc-shaped groove 52. Ten seconds before mold closing and injection, the external hot air generator is activated, and hot air enters the first arc-shaped groove 51 through the hot air inlet pipe 6. The hot air is fed into the upper forming groove 1001 through the upper through hole 1003. The temperature of the mold is monitored by a temperature sensor. Once the preset temperature is reached, the hot air supply is stopped to maintain a stable temperature and prepare for material injection. After the lower mold base 10 rotates, the original upper forming groove 1001 moves to the lower layer. The external cold air generator is activated, and the cold air enters the second arc-shaped groove 52 through the cold air input pipe 7. The cold air then passes through the lower through hole 1003 and acts on the lower forming groove 1001. The temperature of the molded part is monitored by a temperature sensor. Once the temperature drops to the preset curing temperature, the cold air supply is stopped and the part is ready for demolding.

[0031] During the preheating process, the hot air after heat exchange in the first arc-shaped groove 51 flows into the external hot air recovery device through the hot air return pipe 8, and the residual heat is used to preheat the next batch of hot air; during the cooling process, the cold air after heat exchange in the second arc-shaped groove 52 flows into the external cold air recovery device through the cold air return pipe 9, and is recycled after being cooled again. The other parts of this embodiment are the same as those in the above embodiment, and will not be described again.

[0032] Example 5: This embodiment, based on the above embodiment, further adds a guide rod 11, such as... Figure 3 As shown, at least two guide rods 11 are arranged inside the cavity 1002 along a direction perpendicular to the sliding direction of the piston plate 12. The guide rods 11 are symmetrically distributed on both sides of the cavity 1002, and the guide rods 11 penetrate the two piston plates 12 vertically and are slidably connected to them. Two springs 14 are sleeved on the guide rods 11, and the two springs 14 correspond to the two piston plates 12 respectively. One end of the spring 14 abuts against the inner wall of the cavity 1002, and the other end abuts against the side of the piston plate 12 away from the cam 22 on the corresponding side. The elastic coefficient of the spring 14 is adapted to the reset requirement of the piston plate 12. At least two guide rods 11 are symmetrical. Distributed on both sides of the cavity 1002, the piston plates 12 are vertically penetrating the two piston plates 12, restricting the piston plates 12 to slide only along the axial direction of the guide rod 11, i.e., in the vertical direction, to prevent the piston plates 12 from tilting due to uneven force from the cam 22, which would cause the ejector pin 13 to deviate from the forming groove 1001; the spring 14 is sleeved on the guide rod 11, with one end abutting against the inner wall of the cavity 1002 and the other end abutting against the side of the piston plate 12 away from the cam 22; when the cam 22 pushes the piston plate 12 to slide, the spring 14 is compressed and stores elastic potential energy; when the cam 22 rotates away, the spring 14 releases potential energy to push the piston plate 12 to reset, ensuring that the ejector pin 13 returns to the initial position.

[0033] The specific implementation process is as follows: Installation of guide rods 11 and springs 14: Threaded holes are symmetrically machined on the upper and lower sides of the inner wall of cavity 1002. At least two guide rods 11 are vertically fixed in the threaded holes. Two springs 14 are respectively fitted onto the upper and lower sections of the guide rods 11. Two piston plates 12 are then fitted axially along the guide rods 11, ensuring that the piston plates 12 can slide smoothly along the guide rods 11, and that both ends of the springs 14 are in close contact with the inner wall of cavity 1002 and the side of the piston plates 12, respectively. The piston plates 12 are manually pushed to slide along the guide rods 11 to check for tilting or jamming. If jamming occurs, the surface of the guide rods 11 needs to be polished or the piston plates adjusted. The aperture of the cam 22 ensures smooth sliding. After the lower mold base 10 rotates into position, the long end of the cam 22 pushes the lower piston plate 12 to slide downwards along the guide rod 11, compressing the lower spring 14 and ejecting the molding terminal with the ejector pin 13. When the lower mold base 10 rotates again, the long end of the cam 22 leaves the lower piston plate 12, the lower spring 14 releases its elastic potential energy, pushing the lower piston plate 12 upwards along the guide rod 11 to reset, and the ejector pin 13 retracts into the molding groove 1001. At the same time, the upper piston plate 12 remains stationary under the action of the short end of the cam 22, and the upper spring 14 is in its natural state, ensuring that the ejector pin 13 is flush with the bottom surface of the molding groove 1001. The other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0034] Example 6: This embodiment, based on the above embodiment, further defines the positional relationship between the piston plate 12 and the cam 22, such as... Figures 1-4 As shown, when the upper piston plate 12 contacts the outer peripheral surface of the short end of the cam 22, the upper end surface of the upper ejector pin 13 is exactly flush with the bottom surface of the upper forming groove 1001. At this time, the upper forming groove 1001 can be injected with raw materials normally. At this time, the lower piston plate 12 abuts against the outer peripheral surface of the long end of the cam 22, and the lower end surface of the lower ejector pin 13 is exactly flush with the opening edge of the lower forming groove 1001. At this time, the forming terminal in the lower forming groove 1001 can be disengaged from the forming groove 1001 along the ejector pin 13 pushing direction. When the upper piston plate 12 contacts the outer peripheral surface of the short end of the cam 22, the upper end face of the ejector pin 13 is flush with the bottom surface of the upper forming groove 1001. At this time, there are no protrusions in the forming groove 1001, and the raw material can be filled evenly, avoiding the appearance of depressions on the surface of the formed terminal. When the lower piston plate 12 abuts against the outer peripheral surface of the long end of the cam 22, the lower end face of the ejector pin 13 is flush with the edge of the opening of the lower forming groove 1001. At this time, the ejector pin 13 can completely push the formed terminal out of the forming groove 1001, avoiding terminal residue.

[0035] The specific implementation process is as follows: Adjust the lower mold base 10 to a stationary state, use a dial indicator to measure the contact gap between the upper piston plate 12 and the short end of the cam 22, and at the same time measure the height difference between the upper end face of the ejector pin 13 and the bottom surface of the upper forming groove 1001; if the height difference is not zero, adjust the installation position of the cam 22 on the fixed shaft 21 until it meets the requirements; similarly, calibrate the contact position between the lower piston plate 12 and the long end of the cam 22 to ensure that the lower end face of the ejector pin 13 is flush with the opening edge of the lower forming groove 1001.

[0036] For trial production, inject raw material into the upper forming groove 1001. After forming, observe whether there is a dent on the surface of the formed terminal. If there is no dent, it means that the upper position fit is normal. After the lower mold base 10 is rotated 180 degrees, observe whether the ejector pin 13 can completely push out the formed terminal. If the distance between the terminal and the forming groove 1001 is greater than 5mm, it means that the lower position fit is normal. If there is a problem, recalibrate the position of the cam 22 and the piston plate 12.

[0037] After producing every 1000 terminal blocks, the positions of the piston plate 12 and cam 22 are recalibrated using a dial indicator to prevent wear and tear from affecting the positional accuracy. The other parts of this embodiment are the same as those in the previous embodiment and will not be repeated here.

[0038] Example 7: This embodiment further defines the structure of the transmission mechanism based on the above embodiments, such as... Figure 3 , Figure 4As shown, the transmission mechanism includes a ratchet 16, a ratchet tooth 18, and a rack 20. A mounting shaft 15, coaxial with the first arc-shaped groove 51, is coaxially fixed on the lower mold base 10. One end of the mounting shaft 15 extends out from a vertical plate 5 near the transmission mechanism and is rotatably connected to the vertical plate 5 via a bearing. The ratchet 16 is coaxially fixedly connected to the mounting shaft 15. A gear 17, coaxially rotating with the mounting shaft 15, is sleeved on the outside of the ratchet 16. The inner ring of the gear 17 is spaced apart from the outer ring of the ratchet 16. A sliding groove is provided radially on the gear 17, and a spring rod is fixedly installed within the groove. The fixed end of the spring rod is on the side of the groove away from the ratchet 16. The inner wall is connected, and the movable end is set towards the ratchet 16; one end of the ratchet 18 is inserted into the slide groove and fixedly connected to the movable end of the spring rod, and the other end of the ratchet 18 is engaged with the ratchet 16 in one direction, and the engagement direction of the ratchet 18 is consistent with the direction in which the lower mold base 10 needs to rotate; a guide sleeve 19 is fixedly set on the vertical plate 5, and the axis of the guide sleeve 19 is set along the height direction of the frame 1; the rack 20 is slidably connected to the guide sleeve 19 and engages with the gear 17; the top end of the rack 20 is fixedly connected to the bottom of the upper mold base 2, and the length of the rack 20 matches the sliding stroke of the upper mold base 2 and the transmission requirement that the lower mold base 10 needs to rotate 180°. When the upper mold base 2 slides up and down, it drives the rack 20 to slide along the guide sleeve 19. The rack 20 meshes with the gear 17, driving the gear 17 to rotate. When the gear 17 rotates, if the rotation direction is consistent with the meshing direction of the ratchet 18, the ratchet 18 drives the ratchet 16 to rotate, which in turn drives the lower mold base 10 to rotate through the mounting shaft 15. If the rotation direction is opposite, the ratchet 18 compresses the spring rod and disengages from the ratchet 16. The ratchet 16 does not rotate, and the lower mold base 10 remains stationary. The length of the rack 20 is designed according to the transmission requirements of the upper mold base 2 sliding stroke and the lower mold base 10 rotating 180 degrees, ensuring that the lower mold base 10 rotates accurately 180 degrees.

[0039] The specific implementation process is as follows: The mounting shaft 15 is coaxially fixed with the lower mold base 10. A ratchet 16 and a gear 17 are installed sequentially on one end of the mounting shaft 15 that extends out of the vertical plate 5, ensuring that the ratchet 16 is fixed to the mounting shaft 15 and that the gear 17 can rotate coaxially with the mounting shaft 15. A spring rod and a ratchet 18 are installed in the groove of the gear 17. The preload of the spring rod is adjusted so that the ratchet 18 and the ratchet 16 mesh in one direction. The guide sleeve 19 is fixed on the vertical plate 5. The rack 20 passes through the guide sleeve 19 and meshes with the gear 17. The top end of the rack 20 is fixed to the bottom of the upper mold base 2.

[0040] Manually push the upper mold base 2 upwards and observe whether the lower mold base 10 rotates; manually push the upper mold base 2 downwards and observe whether the lower mold base 10 remains stationary; if the test is abnormal, check the meshing direction of the ratchet 18 and ratchet 16, and the meshing clearance of the rack 20 and gear 17, until they meet the requirements. If the rotation angle deviation of the lower mold base 10 is >5°, adjust the length of the rack 20 or adjust the number of teeth of the gear 17 to ensure that the rotation angle is accurately 180 degrees. The other parts of this embodiment are the same as those in the above embodiment and will not be repeated.

[0041] Example 8: This embodiment, based on the above embodiment, further installs the structure of shaft 15, such as... Figure 3 , Figure 4 As shown, at least two positioning holes 151 are provided radially on the mounting shaft 15. The positioning holes 151 are symmetrically distributed about the axis of the mounting shaft 15, and the positions of the positioning holes 151 correspond to the required rest positions after the lower mold base 10 is rotated 180 degrees. A fixing seat 23 is fixedly provided on the vertical plate 5, and the position of the fixing seat 23 corresponds to the distribution range of the positioning holes 151. A slider 24 is slidably provided on the fixing seat 23 radially along the mounting shaft 15. A positioning pin 25 is fixedly provided on one side of the slider 24, and the axis of the positioning pin 25 is... The positioning pin 25 is collinear with the axis of the positioning hole 151, and is inserted into the positioning hole 151 and slidably connected to its inner wall. The outer diameter of the positioning pin 25 is adapted to the inner diameter of the positioning hole 151. The fixed base 23 is provided with a second driving component that drives the slider 24 to slide radially along the mounting shaft 15. The action of the second driving component is linked with the action of the transmission mechanism to drive the lower mold base 10 to rotate, so that when the lower mold base 10 rotates, the positioning pin 25 is driven to disengage from the positioning hole 151, and after the lower mold base 10 is rotated into place, the positioning pin 25 is driven to insert into the positioning hole 151. Two symmetrical positioning holes 151 are provided on the mounting shaft 15, corresponding to the two stationary positions of the lower mold base 10, ensuring that the lower mold base 10 can be accurately locked after rotating into position; the positioning pin 25 is adapted to the positioning hole 151: the outer diameter of the positioning pin 25 matches the inner diameter of the positioning hole 151, ensuring that there is no looseness after insertion and the locking is reliable; the second drive component, such as the electromagnet 27 and the permanent magnet 26, is linked with the transmission mechanism. Before the lower mold base 10 rotates, the second drive component drives the positioning pin 25 to disengage from the positioning hole 151, unlocking the mounting shaft 15; after the lower mold base 10 rotates into position, the second drive component drives the positioning pin 25 to insert into the positioning hole 151, locking the mounting shaft 15.

[0042] The specific implementation process is as follows: Two locating holes 151 are drilled radially symmetrically on the mounting shaft 15, ensuring that the included angle between the axes of the two locating holes 151 is 180 degrees; the fixing seat 23 is fixed on the vertical plate 5, ensuring that the position of the fixing seat 23 corresponds to the distribution range of the locating holes 151; a slider 24 is installed on the fixing seat 23, with a locating pin 25 fixed on one side of the slider 24 and a permanent magnet 26 connected to the other side; an electromagnet 27 is installed on the fixing seat 23, positioned opposite to the permanent magnet 26; the second drive assembly is linked with the control unit of the transmission mechanism.

[0043] Before the lower mold base 10 is rotated by the transmission mechanism, the PLC controller sends a signal to the electromagnet 27. The electromagnet 27 is energized and generates a magnetic field opposite to that of the permanent magnet 26, which pushes the slider 24 to move the positioning pin 25 out of the positioning hole 151 to unlock. After the lower mold base 10 rotates 180 degrees, the PLC controller sends a reverse signal to the electromagnet 27. The electromagnet 27 generates a magnetic field the same as that of the permanent magnet 26, which attracts the slider 24 to move the positioning pin 25 into the positioning hole 151 to lock. The insertion depth of the positioning pin 25 is observed to ensure reliable locking.

[0044] After every 500 terminal blocks are produced, check the clearance between the positioning pin 25 and the positioning hole 151. If the clearance is too large, replace the positioning pin 25 or repair the positioning hole 151. At the same time, check the action response time of the second drive component to avoid response delays that could prevent the lower mold base 10 from locking in time after rotating into place. The other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0045] It is understood that the working principle and process of the terminal block production mold structure according to one embodiment of the present invention, such as the hydraulic cylinder 4 and the electromagnet 27, are existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A terminal block manufacturing mold, characterized in that, include: A frame (1) is provided with an upper mold base (2) slidably disposed on the frame (1), and a first drive assembly is provided on the frame (1) to drive the upper mold base (2) to slide along the height direction of the frame (1); Vertical plates (5), two vertical plates (5) are spaced apart on the frame (1) and located below the upper mold base (2). A first arc groove (51) and a second arc groove (52) are respectively provided on the adjacent side of the two vertical plates (5). The first arc groove (51) and the second arc groove (52) are coaxial. The lower mold base (10) is rotatably disposed between two vertical plates (5). Two forming grooves (1001) are symmetrically arranged on the lower mold base (10) about its rotation axis. A cavity (1002) is centrally disposed on the lower mold base (10). Four through holes (1003) communicating with the cavity (1002) are provided on the lower mold base (10). The four through holes (1003) are divided into upper and lower groups, with two through holes (1003) in each group. When the lower mold base (10) is stationary, the two through holes (1003) in the upper layer are connected to the first arc groove (51) on the corresponding side, and the two through holes (1003) in the lower layer are connected to the second arc groove (52) on the corresponding side. Piston plate (12), the piston plate (12) includes two, both piston plates (12) are slidably disposed in cavity (1002), the two piston plates (12) correspond to two sets of through holes (1003) respectively, and ejector pins (13) are provided on the piston plate (12), the ejector pins (13) are inserted into the forming groove (1001) on the corresponding side; A fixed shaft (21) is fixedly mounted on one of the vertical plates (5) and coaxial with the first arc groove (51). The other end of the fixed shaft (21) is inserted into the cavity (1002). A cam (22) is provided on the fixed shaft (21). The cam (22) is located between the two piston plates (12) with its long end facing down. The transmission mechanism is connected to the upper mold base (2) and the lower mold base (10). When the upper mold base (2) drives the material in the molding groove (1001) to be initially shaped and then slides up to reset, the transmission mechanism drives the lower mold base (10) to rotate 180 degrees. When the upper mold base (2) slides down to match the lower mold base (10) for material injection, the lower mold base (10) does not rotate.

2. The terminal block manufacturing mold according to claim 1, characterized in that, The upper mold base (2) is provided with a guide pipe (3) for injecting raw materials into the molding groove (1001). The feed end of the guide pipe (3) is connected to an external raw material supply device, and the discharge end is provided to correspond to the opening of the upper molding groove (1001) when the upper mold base (2) slides down to adapt to the lower mold base (10). The inner diameter of the guide pipe (3) is adapted to the feeding requirements of the molding groove (1001).

3. The terminal block manufacturing mold according to claim 1, characterized in that, The first arc groove (51) and the second arc groove (52) are arranged in a ring array about their axis, and the arc length of the first arc groove (51) and the second arc groove (52) are adapted to the distribution range of the corresponding through holes (1003) when the lower mold base (10) is stationary; the first arc groove (51) can only be connected to the two through holes (1003) of the upper layer at the same time, and the second arc groove (52) can only be connected to the two through holes (1003) of the lower layer at the same time. The through holes (1003) are located between the piston plate (12) and the forming groove (1001) on the corresponding side, and the diameter of the through holes (1003) is adapted to the fluid transmission requirements of the first arc groove (51) and the second arc groove (52).

4. The terminal block manufacturing mold according to claim 1, characterized in that, One of the vertical plates (5) is provided with a hot air input pipe (6) connected to its first arc groove (51) and a cold air input pipe (7) connected to its second arc groove (52). The input end of the hot air input pipe (6) is connected to an external hot air generating device, and the input end of the cold air input pipe (7) is connected to an external cold air generating device. The other vertical plate (5) is provided with a hot air return pipe (8) connected to its first arc groove (51) and a cold air return pipe (9) connected to its second arc groove (52). The output end of the hot air return pipe (8) is connected to an external hot air recovery device, and the output end of the cold air return pipe (9) is connected to an external cold air recovery device. The first arc groove (51) is connected to the upper through hole (1003) to transmit preheated hot air to the forming tank (1001), and the second arc groove (52) is connected to the lower through hole (1003) to transmit cooling cold air to the forming tank (1001).

5. A terminal block manufacturing mold according to claim 1, characterized in that, At least two guide rods (11) are arranged inside the cavity (1002) along the sliding direction perpendicular to the piston plate (12). The guide rods (11) are symmetrically distributed on both sides of the cavity (1002) and the guide rods (11) penetrate the two piston plates (12) vertically and slide with them. Two springs (14) are sleeved on the guide rods (11). The two springs (14) correspond to the two piston plates (12) respectively. One end of the spring (14) abuts against the inner wall of the cavity (1002), and the other end abuts against the side of the piston plate (12) away from the cam (22) on the corresponding side. The elastic coefficient of the spring (14) is adapted to the reset requirement of the piston plate (12).

6. A terminal block manufacturing mold according to claim 1, characterized in that, When the upper piston plate (12) contacts the outer peripheral surface of the short end of the cam (22), the upper end surface of the upper ejector pin (13) is flush with the bottom surface of the upper forming groove (1001). At this time, the upper forming groove (1001) can be injected with raw materials normally. At this time, the lower piston plate (12) abuts against the outer peripheral surface of the long end of the cam (22), and the lower end surface of the lower ejector pin (13) is flush with the opening edge of the lower forming groove (1001). At this time, the forming terminal in the lower forming groove (1001) can be disengaged from the forming groove (1001) along the ejector pin (13) pushing direction.

7. A terminal block manufacturing mold according to claim 1, characterized in that, The transmission mechanism includes a ratchet (16), a ratchet tooth (18), and a rack (20). A mounting shaft (15) coaxially fixed on the lower mold base (10) and coaxial with the first arc groove (51) is provided. One end of the mounting shaft (15) extends out of the vertical plate (5) near the transmission mechanism and is rotatably connected to the vertical plate (5) through a bearing. The ratchet (16) is coaxially fixedly connected to the mounting shaft (15). A gear (17) coaxially rotating with the mounting shaft (15) is sleeved on the outside of the ratchet (16). The inner ring of the gear (17) is spaced apart from the outer ring of the ratchet (16). A sliding groove is provided on the gear (17) along its radial direction. A spring rod is fixedly provided in the sliding groove. The fixed end of the spring rod is on the side of the sliding groove away from the ratchet (16). The wall is connected, and the movable end is set towards the ratchet (16); one end of the ratchet (18) is inserted into the slide groove and fixedly connected to the movable end of the spring rod, and the other end of the ratchet (18) meshes with the ratchet (16) in one direction, and the meshing direction of the ratchet (18) is consistent with the direction that the lower mold base (10) needs to rotate; a guide sleeve (19) is fixedly set on the vertical plate (5), and the axis of the guide sleeve (19) is set along the height direction of the frame (1). The rack (20) is slidably connected to the guide sleeve (19) and meshes with the gear (17). The top end of the rack (20) is fixedly connected to the bottom of the upper mold base (2), and the length of the rack (20) matches the sliding stroke of the upper mold base (2) and the transmission requirement that the lower mold base (10) needs to rotate 180°.

8. A terminal block manufacturing mold according to claim 7, characterized in that, At least two positioning holes (151) are provided radially on the mounting shaft (15). The positioning holes (151) are symmetrically distributed about the axis of the mounting shaft (15), and the position of the positioning holes (151) corresponds to the required static position after the lower mold base (10) is rotated 180 degrees. A fixing seat (23) is fixedly provided on the vertical plate (5). The position of the fixing seat (23) corresponds to the distribution range of the positioning holes (151). A slider (24) is slidably provided on the fixing seat (23) radially along the mounting shaft (15). A positioning pin (25) is fixedly provided on one side of the slider (24). The axis of the positioning pin (25) is... The positioning pin (25) is collinear with the axis of the positioning hole (151), and is inserted into the positioning hole (151) and slidably connected to its inner wall. The outer diameter of the positioning pin (25) is adapted to the inner diameter of the positioning hole (151). The fixed seat (23) is provided with a second driving component that drives the slider (24) to slide radially along the mounting shaft (15). The action of the second driving component is linked with the action of the transmission mechanism to drive the lower mold base (10) to rotate, so that when the lower mold base (10) rotates, the positioning pin (25) is driven to disengage from the positioning hole (151). After the lower mold base (10) is rotated into place, the positioning pin (25) is driven to insert into the positioning hole (151).

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