Variable temperature control local thin wall integrated forming injection mold

Abstract

This application discloses a variable temperature-controlled, locally thin-walled, integrally molded injection mold, including a mold body, multiple pipe loop units, and multiple flow-disrupting components. The pipe loop units are disposed within the mold body and correspond to the thin-walled region of the molded product. The multiple pipe loop units are connected in parallel, and the flow-disrupting components are installed inside the pipes of the pipe loop units. During injection molding, fluid is adapted to simultaneously flow into the multiple parallel pipe loop units and be agitated by the flow-disrupting components, thereby creating turbulent flow within the pipes. The beneficial effects of this application are: by designing the pipe loop units in parallel within the mold and installing flow-disrupting components within the pipes; utilizing the flow-dividing characteristics of the parallel structure, each corresponding area of ​​the thin-walled region of the molded product can simultaneously and uniformly receive heat or cold, reducing the large temperature gradient problem caused by long-distance fluid loss in series structures; the flow-disrupting components force the fluid to form turbulence, improving heat exchange efficiency.

Description

Technical Field

[0001] This application relates to the field of injection mold technology, and in particular to a variable temperature controlled local thin-walled integral injection mold. Background Technology

[0002] In injection molding, for thin-walled products (such as...) Figure 1 As shown, steam high-gloss molding (also known as steam-heated mold, rapid cooling and heating mold temperature technology, high-gloss injection molding) is a key surface quality improvement technology. Its core purpose is to fundamentally eliminate product surface defects by instantly and precisely controlling the mold temperature, thereby obtaining products with extremely high appearance quality.

[0003] This mold has an independent temperature control system. At different stages of the injection molding cycle, high-temperature steam and low-temperature cooling water are introduced into the internal pipes (usually near the cavity surface) to achieve rapid heating and cooling of the mold surface. However, existing temperature control systems have the following drawback: as the fluid flows through the long, narrow network of pipes inside the mold, a significant temperature difference occurs between the inlet and outlet. For example, when cooling water flows forward, the area near the inlet is cooled rapidly first, followed by the outlet area. This results in a large temperature gradient in the mold cavity during the initial cooling phase, leading to uneven shrinkage, internal stress, or surface warping in thin-walled products. Therefore, improving the existing internal pipe network of the mold to overcome these problems is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] One of the objectives of this application is to provide a variable temperature-controlled, locally thin-walled, one-piece injection mold.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a variable temperature-controlled local thin-walled integral molding injection mold, comprising a mold body, multiple pipe loop units, and multiple flow-disrupting components. The pipe loop units are disposed within the mold body and correspond to the thin-walled area of ​​the molded product. The multiple pipe loop units are connected in parallel. The flow-disrupting components are installed inside the pipes of the pipe loop units. During injection molding, the fluid is adapted to flow synchronously into the multiple parallel pipe loop units and be disturbed by the flow-disrupting components, so that the fluid forms a turbulent state in the pipes.

[0006] Preferably, the variable temperature controlled local thin-walled integral molding injection mold further includes an interlocking mechanism and multiple valve bodies. The valve bodies are connected to the total input end of the multiple pipe circuit units through pipelines and are correspondingly matched with different types of fluids. The interlocking mechanism is installed on the valve bodies and is used to realize interlocking control between the valve bodies. During injection molding, when one of the valve bodies is opened, the remaining valve bodies are adapted to remain locked under the action of the interlocking mechanism.

[0007] Preferably, the valve body is a solenoid valve and has a pair; the interlocking mechanism includes a base, an interlocking plate, a pair of interlocking blocks, and a pair of interlocking rods. The base is installed on the valve body, the interlocking rods vertically pass through the solenoid valves and are connected to the valve stems inside the corresponding solenoid valves, the interlocking blocks are correspondingly installed on the top of the interlocking rods, and the interlocking plate is movably disposed on the base; when one of the solenoid valves is opened, the corresponding interlocking rod drives the interlocking block to move upward to drive the interlocking plate to move, so that the interlocking plate abuts against the top of the other interlocking block.

[0008] Preferably, the interlocking plate is horizontally and elastically mounted on the base via a rotating shaft, and the top of the interlocking plate has a pair of interlocking holes; when one of the solenoid valves is opened, the interlocking block engages with the corresponding interlocking hole in a wedge-shaped pressing fit to drive the interlocking plate to rotate.

[0009] Preferably, the interlocking plate is horizontally and elastically slidably mounted on the base, and the top of the interlocking plate has a pair of interlocking holes; when one of the solenoid valves is opened, the interlocking block engages with the corresponding interlocking hole in a wedge-shaped pressing fit to drive the interlocking plate to move.

[0010] Preferably, the interlocking block has a wedge-shaped structure, and the wedge-shaped surfaces of the two interlocking blocks are arranged opposite each other, so that the interlocking plate can only cooperate with one of the interlocking blocks to realize the movement.

[0011] Preferably, the valve body is a solenoid valve and has three of them; the interlocking mechanism includes a base, a pair of interlocking plates, three interlocking blocks, and three interlocking rods. The base is installed on the valve body, the interlocking rods vertically pass through the solenoid valves and are connected to the valve stems inside the corresponding solenoid valves, the interlocking blocks are correspondingly installed on the tops of the interlocking rods and are distributed in a straight line at intervals, the interlocking plates are elastically and horizontally slidably disposed on the base, the two interlocking plates are distributed in a straight line and are in abutting state under the action of elastic force; when one of the solenoid valves is opened, the corresponding interlocking rod drives the interlocking block to move upward to drive the corresponding interlocking plate to slide synchronously or relatively, so that the interlocking plate abuts against the tops of the other interlocking blocks.

[0012] Preferably, the interlocking block has a wedge-shaped structure and is divided into a first wedge block and a pair of second wedge blocks. The first wedge block is located at the center of the top of the base, and the second wedge blocks are located on both sides of the top of the base. Each of the two interlocking plates has a first locking slot that cooperates with the first wedge block at one opposite end, and a second locking slot that cooperates with the second wedge block at the top of each of the two interlocking plates. When the first wedge block moves upward, it cooperates with the first locking slot to drive the pair of interlocking plates to move away from each other and abut against the top of the second wedge block. When one of the second wedge blocks moves upward, it cooperates with the corresponding second locking slot to drive the pair of interlocking plates to move synchronously and abut against the top of the other second wedge block and the top of the first wedge block.

[0013] Preferably, the first wedge block is in the shape of an isosceles trapezoid; the wedge surfaces of the two second wedge blocks are arranged opposite each other, so that the interlocking plate can only cooperate with one of the interlocking blocks to achieve sliding.

[0014] Preferably, the baffle is a plurality of protrusions disposed inside the pipe; or the baffle is a spiral blade inserted into the pipe.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] (1) The present invention designs the pipe loop units in the mold in parallel and also sets the turbulence-disrupting element inside the pipe loop unit; during injection molding, the fluid medium can flow into multiple parallel pipe loop units simultaneously. With the help of the flow-dividing characteristics of the parallel structure, the fluid pressure and flow rate in each pipe loop unit can be kept basically consistent, so that each corresponding area of ​​the thin-walled area of ​​the molded product can receive heat or cold at the same time and uniformly, which greatly reduces the problem of large temperature gradient caused by fluid loss along a long path in the series structure; while the turbulence-disrupting element will force the fluid to form turbulent flow, thereby improving the heat exchange efficiency.

[0017] (2) This invention incorporates an interlocking mechanism that enables the solenoid valves controlling the three fluids to interlock. When one solenoid valve is open, the remaining solenoid valves remain locked under the action of the interlocking mechanism, effectively preventing safety issues caused by the simultaneous introduction of multiple fluid media due to valve body failure. Furthermore, the interlocking mechanism ensures that only one solenoid valve can be opened at a time, further enhancing the safety of the equipment. In addition, the interlocking mechanism is a purely mechanical structure, which is simple in structure, low in cost, and easy to process and assemble. It does not rely on complex electrical control systems or sensor feedback, which not only reduces the manufacturing cost and subsequent maintenance difficulty of the equipment, but also avoids potential hazards of electromagnetic interference, signal delay, and other electrical control interlocking schemes, ensuring that the interlocking function can still be stably performed under extreme working conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an existing thin-walled product.

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 3 This is a schematic diagram illustrating the principle of parallel connection of the pipe loop units of the present invention.

[0021] Figure 4 This is a schematic diagram of the spoiler structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the interlocking mechanism of the present invention in conjunction with the valve body.

[0023] Figure 6 This is a schematic diagram of the internal structure of the solenoid valve of the present invention.

[0024] Figure 7 This is a schematic diagram of the internal structure of the interlocking mechanism of the present invention.

[0025] Figure 8 This is a schematic diagram of the specific structure of the interlocking mechanism of the present invention.

[0026] Figure 9 This is a schematic diagram of the structure of the two interlocking plates and three interlocking blocks of the present invention.

[0027] Figure 10 This is a schematic diagram illustrating the working principle of the solenoid valve in the closed state and the left solenoid valve in the open state of the present invention.

[0028] Figure 11 This is a schematic diagram illustrating the working principle of the central solenoid valve when it is opened and the working principle of the corresponding interlocking plate moving when the three interlocking blocks move upward.

[0029] Figure 12 This is a schematic diagram of the structure of the interlocking plate in Embodiment 1 of the present invention.

[0030] In the figure: 1. Mold body; 2. Pipeline circuit unit; 3. Solenoid valve; 301. Valve core; 302. Valve stem; 4. Interlocking mechanism; 401. Base; 402. Interlocking plate; 403. Interlocking block; 404. Interlocking rod; 5. Turbulence component; 6. First locking port; 7. Second locking port; 8. Interlocking hole. Detailed Implementation

[0031] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0032] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 should not be construed as limiting the specific protection scope of this application.

[0033] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0034] Further description of the existing technology: The core function of steam high-gloss technology is to fundamentally solve defects such as surface flow marks, weld lines, and uneven gloss caused by rapid melt cooling through dynamic mold temperature control of "rapid heating followed by rapid cooling," ensuring production efficiency while directly injection molding "paint-free" products with extremely high gloss and perfect appearance. During the entire injection molding process, different types of fluid media are introduced into the piping network within the mold body 1. Specifically, after mold closing and before injection: high-temperature steam (usually 160-180°C or even higher) is introduced into the mold piping. After injection molding, two processes occur. The first process: before introducing cooling water, compressed air must be used to purge residual steam from the mold piping to prevent "water hammer effect" and vacuum / pressure shock (core safety and equipment protection). The second process: low-temperature cooling water is introduced to rapidly solidify the product, achieving ejection strength.

[0035] The shortcomings of existing technology are as follows: Multiple interconnected pipe loop units 2 are designed within the mold body 1. ① For steam: When steam flows through the complex and elongated pipe network inside the mold, pressure drop and heat loss occur; this may result in areas far from the air inlet not heating up, or heating up more slowly than those closer to the inlet. ② For cooling water: The area near the inlet is cooled rapidly first, followed by the outlet area, resulting in a large temperature gradient in the mold cavity during the initial cooling phase. This leads to uneven local shrinkage of thin-walled products, internal stress, or surface warping, among other quality problems. ③ Uneven cooling (laminar cooling effect): Only a thin layer of water adhering to the pipe wall effectively exchanges heat with the pipe wall. The water flow in the center of the pipe is almost an "insulating core," thus participating very little in cooling. This is the fundamental reason for the cooling water "advancing sequentially" and the large temperature gradient in the mold.

[0036] Therefore, the inventors of this application have developed a variable temperature-controlled, locally thin-walled, one-piece injection mold, one embodiment of which is, for example... Figures 1 to 12 As shown, it includes a mold body 1, multiple pipe loop units 2 and multiple flow-disrupting components 5. The pipe loop units 2 are disposed inside the mold body 1 and correspond to the thin-walled area of ​​the molded product. The multiple pipe loop units 2 are connected in parallel. The flow-disrupting components 5 are installed inside the pipes of the pipe loop units 2.

[0037] Understandably, during injection molding, fluids (especially high-temperature steam and low-temperature cooling water) can simultaneously flow into multiple parallel pipe loop units 2. Utilizing the flow-dividing characteristics of the parallel structure, the fluid pressure and flow rate within each pipe loop unit 2 can remain essentially consistent. This allows corresponding areas of the thin-walled region of the molded product to simultaneously and uniformly receive heat or cold, significantly reducing the large temperature gradient problem caused by fluid loss along long distances in series structures. Simultaneously, as the fluid flows through the pipes of the pipe loop unit 2, it collides and agitates with the flow-disrupting elements 5 installed within the pipes. This forces the fluid to form turbulent flow within the pipes, ensuring that the fluid in the central region of the pipes also makes full contact with the pipe walls, thereby maximizing heat exchange efficiency.

[0038] This application does not specifically limit the structure of the spoiler 5, but two specific embodiments are provided below for reference:

[0039] Structure 1: such as Figure 4 As shown, multiple protrusions are arranged at intervals inside the pipe of the mold body 1. The protrusions will disrupt the original stable laminar flow state of the fluid, forcing the fluid to form vortices and disturbances in the pipe, increasing the contact area and contact frequency between the fluid and the pipe wall, thereby improving the heat exchange efficiency.

[0040] Structure 2 (not shown): A spiral blade can be inserted into the pipe of the pipe loop unit 2 on the side of the mold body 1. The spiral blade extends forward along the pipe direction, and its spiral structure guides the fluid to form a rotating flow inside the pipe, causing the fluid originally in the center of the pipe to be "thrown" towards the pipe wall. At the same time, it breaks the laminar boundary layer, allowing the hot and cold fluids to mix fully and further enhance the heat exchange effect. Of course, the pitch and blade angle of the spiral blade can be adapted and adjusted according to the pipe diameter and fluid flow rate to achieve the best turbulence effect.

[0041] It should be noted that Structure 1, being installed inside the pipe (pipeline), is not convenient for later disassembly and maintenance, making it suitable for scenarios where relatively stable turbulence effects are required and infrequent adjustments are not necessary. Structure 2, on the other hand, is installed via a side-mounted connection, allowing for flexible replacement of spiral blades with different pitches or blade angles according to actual production needs (such as the varying cooling rate requirements of thin-walled products made of different materials), thus improving the adaptability and flexibility of the mold. Of course, both structures can meet practical needs, and those skilled in the art can choose according to the specific circumstances.

[0042] In actual heating or cooling processes, such as Figure 2 As shown, a four-way connector is installed at the total input end of multiple pipeline loop units 2. The other three tees of the four-way connector are connected to different types of fluids through external pipelines and valve bodies, namely, high-temperature steam source, compressed air source, and low-temperature cooling water source. In specific operation, only the corresponding valve body needs to be opened to allow the corresponding fluid to flow in, greatly improving operating efficiency. For example, the (steam) valve body is opened during heating; after injection molding is completed, the (steam) valve body is closed first, and the (compressed air) valve body is opened; finally, the (compressed air) valve body is closed, and the (cooling water) valve body is opened.

[0043] Therefore, during the entire injection molding process, only one valve body can be opened, while the other two valve bodies remain closed. This is to prevent different types of fluid media from mixing in the pipeline, which could cause equipment damage or process disruption. Especially for steam and cooling water, if both fluids are simultaneously introduced into pipeline unit 2, the large temperature difference can easily cause severe thermal expansion and contraction shocks, potentially leading to safety issues.

[0044] Therefore, to solve the above-mentioned technical problems, in this embodiment, an interlocking mechanism 4 can be installed between multiple valve bodies. It is understood that during injection molding, when one valve body is opened, the remaining valve bodies can remain locked under the action of the interlocking mechanism 4, effectively preventing the simultaneous introduction of multiple fluid media due to valve body malfunction.

[0045] Specifically, in this process, the valve body is generally controlled by an automatic solenoid valve 3. The solenoid valve 3 can be used in pairs or threes. When used in pairs, it is mainly used for the on / off switching of steam and cooling water. The interlocking mechanism 4 can also adopt different structures depending on the number of solenoid valves 3 used.

[0046] Example 1:

[0047] The solenoid valves 3 are in pairs. The interlocking mechanism 4 includes a base 401, an interlocking plate 402, a pair of interlocking blocks 403, and a pair of interlocking rods 404. The base 401 is mounted on both valve bodies. The interlocking rods 404 vertically penetrate the valve bodies and connect to the valve stem 302 (or valve core 301) in the corresponding valve body. The interlocking blocks 403 are correspondingly mounted on the top of the interlocking rods 404. The interlocking plate 402 is movably mounted on the base 401. It can be understood that when one of the solenoid valves 3 is opened, the corresponding interlocking rod 404 drives the interlocking block 403 to move upward, thereby causing the interlocking plate 402 to move, so that the interlocking plate 402 abuts against the top of the other interlocking block 403, thus locking the other solenoid valve 3.

[0048] This application does not specifically limit the structure and installation method of the interlocking plate 402. The following two specific embodiments are provided for reference:

[0049] Structure 1 (e.g.) Figure 12 As shown): The interlocking plate 402 is horizontally and elastically mounted on the base 401 via a rotating shaft and a torsion spring. The top of the interlocking plate 402 has a pair of interlocking holes 8 that cooperate with the interlocking block 403.

[0050] Understandably, when one of the solenoid valves 3 opens, the corresponding interlocking rod 404 will move upward under the action of the valve core 301 or the valve stem 302. Consequently, the interlocking block 403 will extend into the interlocking hole 8. The interlocking block 403 will drive the interlocking plate 402 to rotate through the wedge-shaped pressing action. At this time, the other interlocking hole 8 on the interlocking plate 402 will be misaligned with the other interlocking block 403, that is, the interlocking plate 402 will abut against the top of the other interlocking block 403, thereby restricting the opening of the other solenoid valve 3. In this way, even if the other solenoid valve 3 is energized due to a malfunction, its valve core 301 or valve stem 302 will not be able to push the interlocking rod 404 upward, thus being in a locked and limited state. Conversely, when the solenoid valve 3 is closed, the interlocking rod 404 drives the interlocking block 403 to move down and disengage from the interlocking hole 8. The interlocking plate 402 rotates back to its initial position under the elastic reset action of the torsion spring, and the two interlocking holes 8 are re-aligned with the corresponding interlocking blocks 403. At this time, the other solenoid valve 3 can be opened normally.

[0051] Structure 2 (not shown, but can be referenced similarly) Figure 9 The interlocking plate 402 can be horizontally and elastically slidably mounted on the base 401 by means of a spring. The top of the interlocking plate 402 has a pair of interlocking holes 8. That is, the interlocking plate 402 is horizontally slid by the wedge-shaped pressing fit of the interlocking block 403, and then the interlocking plate 402 is moved and reset by the spring. Its structural principle is similar to that of the structure described above, so it will not be described in detail here.

[0052] Further optimization, such as Figure 12As shown, the interlocking block 403 has a wedge-shaped structure, and the wedge-shaped surfaces (i.e., inclined surfaces or slope surfaces) of the two interlocking blocks 403 are arranged opposite each other, so that the interlocking plate 402 can only cooperate with one of the interlocking blocks 403 to realize the movement.

[0053] Understandably, for structure one, such as Figure 12 As shown, when the two interlocking blocks 403 move upwards simultaneously, the left interlocking block 403 will drive the interlocking plate 402 to rotate counterclockwise, and the right interlocking block 403 will drive the interlocking plate 402 to rotate clockwise. This means the rotation of the interlocking plate 402 will interfere with each other, preventing the interlocking plate 402 from rotating. Similarly, for structure two, a similar approach can be taken. Figure 11 As shown in the diagram below, the left interlocking block 403 drives the interlocking plate 402 to move to the right, and the right interlocking block 403 drives the interlocking plate 402 to move to the left. This means the movement of the interlocking plate 402 interferes with each other, preventing it from moving. In other words, the two solenoid valves 3 cannot open simultaneously. This ensures that when one solenoid valve 3 is open, the other is locked. It also ensures that if both solenoid valves 3 are energized simultaneously due to misoperation or malfunction, the interlocking plate 402 cannot move or rotate due to bidirectional interference. Therefore, only one solenoid valve 3 can be opened normally at any given time, further improving the equipment's safety redundancy.

[0054] Example 2:

[0055] The valve body is a solenoid valve 3, and three of them are used. The interlocking mechanism 4 includes a base 401, a pair of interlocking plates 402, three interlocking blocks 403, and three interlocking rods 404. The base 401 is installed on the valve body. The interlocking rods 404 vertically pass through the solenoid valve 3 and are connected to the valve stem 302 in the corresponding solenoid valve 3. The interlocking blocks 403 are installed on the top of the interlocking rods 404 and are distributed in a straight line at intervals. The interlocking plates 402 can be elastically slid horizontally on the base 401 by springs. The two interlocking plates 402 are distributed in a straight line and are in a resisting state under the action of elastic force.

[0056] Specifically, the interlocking block 403 has a wedge-shaped structure and is divided into a first wedge block and a pair of second wedge blocks. The first wedge block is located at the middle of the top of the base 401, and the second wedge blocks are located on both sides of the top of the base 401. Each of the two interlocking plates 402 has a first locking port 6 that cooperates with the first wedge block at one end, and each of the two interlocking plates 402 has a second locking port 7 that cooperates with the second wedge block at the top. The first wedge block is in the shape of an isosceles trapezoid; the wedge surfaces of the two second wedge blocks are arranged opposite each other.

[0057] It is understandable that this interlocking mechanism 4 is for interlocking between the three solenoid valves 3. After one solenoid valve 3 is opened, the other two solenoid valves 3 are locked, and it also ensures that only one solenoid valve 3 can be opened normally at a time. To facilitate understanding of the working logic of this interlocking mechanism 4, it is explained in detail below:

[0058] like Figure 10 and Figure 11 As shown, the three interlocking blocks 403 and their corresponding solenoid valves 3 are numbered I, II, and III from left to right. Let solenoid valve I correspond to steam, solenoid valve II to compressed air, and solenoid valve III to cooling water. Figure 10 As shown in the diagram above, the three solenoid valves 3 are in the closed state at this time. Under the action of the spring force, the three interlocking blocks 403 and the corresponding locks on the interlocking plate 402 cooperate with each other.

[0059] ① When introducing steam, open solenoid valve I, as follows: Figure 10 As shown in the diagram below, the valve core 301 or valve stem 302 of solenoid valve I pushes the interlocking rod 404 upward, causing the second wedge block on the left (interlocking block I) to move upward. Its wedge surface contacts the edge of the second locking port 7 of the left interlocking plate 402, generating a rightward squeezing force, which in turn causes both interlocking plates 402 to slide synchronously to the right. At this time, the first locking port 6 is misaligned with the middle second wedge block (interlocking block II), and the second locking port 7 of the left interlocking plate 402 is also misaligned with the right second wedge block (interlocking block III). That is, the left interlocking plate 402 abuts against the top of interlocking block II, and the right interlocking plate 402 abuts against the top of interlocking block III, thereby locking solenoid valves II and III and preventing compressed air and cooling water from entering. The opening of solenoid valve III works on a similar principle and will not be described further here.

[0060] ② When introducing compressed air, open solenoid valve II, as follows: Figure 11 As shown in the diagram above, the valve core 301 or valve stem 302 of solenoid valve II pushes the interlocking rod 404 upward, causing the first wedge block (interlocking block II) in the middle to move upward. The hypotenuse of its isosceles trapezoid contacts the edges of the first locking ports 6 of the two interlocking plates 402 respectively, generating a squeezing force to both sides, which causes the left interlocking plate 402 to slide to the left and the right interlocking plate 402 to slide to the right. At this time, the second locking port 7 of the left interlocking plate 402 is misaligned with interlocking block I, and the second locking port 7 of the right interlocking plate 402 is misaligned with interlocking block III. That is, the left interlocking plate 402 abuts against the top of interlocking block I, and the right interlocking plate 402 abuts against the top of interlocking block III, thereby locking solenoid valves I and III and preventing steam and cooling water from entering.

[0061] ③ For example Figure 11As shown in the diagram below, if solenoid valve 3 malfunctions, causing two or three to open simultaneously, for example, if solenoid valves I and II are energized at the same time, interlocking block I (the second wedge block on the left) will push the left interlocking plate 402 to slide to the right, and interlocking block II (the first wedge block in the middle) will push the left interlocking plate 402 to slide to the left. The forces in the two directions cancel each other out, and the left interlocking plate 402 cannot move. Similarly, interlocking block II pushes the right interlocking plate 402 to slide to the right. If solenoid valve III also malfunctions at this time, interlocking block III (the second wedge block on the right) will push the right interlocking plate 402 to slide to the left. The bidirectional force interference will also prevent the right interlocking plate 402 from moving. If solenoid valves I and III are energized simultaneously, interlocking block I pushes the left interlocking plate 402 to slide to the right, and interlocking block III pushes the right interlocking plate 402 to slide to the left. The two interlocking plates 402 are pressed against each other in the middle position and cannot move further. At this time, neither interlocking block I nor interlocking block III can fully extend into the corresponding locking port, the valve core 301 or valve stem 302 cannot complete the upward movement, and the two corresponding solenoid valves 3 cannot be opened normally. If all three solenoid valves 3 are energized simultaneously, and the three interlocking blocks 403 move upward in sync, interlocking block I pushes the left interlocking plate 402 to slide to the right, interlocking block III pushes the right interlocking plate 402 to slide to the left, and interlocking block II pushes the two interlocking plates 402 to slide in opposite directions. The forces in multiple directions interfere with each other and cancel each other out, so that none of the interlocking plates 402 can produce effective displacement. In the end, none of the three interlocking blocks 403 can move upward smoothly, and the valve core 301 or valve stem 302 of the solenoid valve 3 is blocked by the interlocking plate 402 and cannot complete the opening action. From the mechanical structure level, this greatly reduces the safety hazards of multiple fluid media being introduced at the same time.

[0062] Finally, it should be noted that the above embodiment one is for the interlock between two solenoid valves 3, and embodiment two is for the interlock between three solenoid valves 3. Both embodiments adopt a purely mechanical structure, which is simple in structure, low in cost, and easy to process and assemble. It does not rely on a complex electronic control system or sensor feedback, which not only reduces the manufacturing cost of the equipment and the difficulty of later maintenance, but also avoids the potential hidden dangers of electronic control interlock schemes such as electromagnetic interference and signal delay, ensuring that the interlocking function can still be stably performed under extreme working conditions.

[0063] Furthermore, although Embodiment 2 and Embodiment 1 share similar structural types, the design concept and difficulty of Embodiment 2 are greater. In other words, without creative effort, it is difficult to derive and extend the interlocking logic of the three solenoid valves 3 from the interlocking structure of the two solenoid valves 3 in Embodiment 1. For example, Embodiment 2 directly adopts the idea of ​​Embodiment 1, where the three solenoid valves 3 share a single interlocking plate 402 for interlocking. It is impossible to achieve the situation where the wedge-shaped surfaces of any two interlocking blocks 403 are set opposite each other, thus failing to achieve the effect of pairwise interlocking of the three solenoid valves 3. However, Embodiment 2 sets two elastically sliding interlocking plates 402, and designs the middle interlocking block 403 as an isosceles trapezoidal first wedge block, and the two interlocking blocks 403 on both sides as second wedge blocks with their wedge-shaped surfaces facing each other. By using the horizontal thrust generated by the wedge compression to limit the movement of the two interlocking plates 402 synchronously or relative to each other, the omnidirectional interlocking between the three solenoid valves 3 is achieved. This design retains the reliability of mechanical interlocks while expanding application scenarios through structural innovation. It can perfectly adapt to the temperature control requirements of three fluids, including high-temperature steam, compressed air, and low-temperature cooling water, further improving the safety and stability of the mold under complex process conditions.

[0064] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A variable temperature-controlled, locally thin-walled, one-piece injection mold, characterized in that, include: Mold body; Multiple pipe loop units, each disposed within the mold body and corresponding to the thin-walled region of the molded product, are connected in parallel. Multiple flow-disrupting elements are installed inside the pipes of the pipe loop unit; during injection molding, fluid is adapted to flow into multiple parallel pipe loop units simultaneously and be disturbed by the flow-disrupting elements, so that the fluid forms a turbulent state in the pipes. The variable temperature controlled local thin-walled integral molding injection mold also includes an interlocking mechanism and multiple valve bodies. The valve bodies are connected to the total input end of the multiple pipe circuit units through pipes and are correspondingly matched with different types of fluids. The interlocking mechanism is installed on the valve bodies and is used to realize the interlocking control between the valve bodies. During injection molding, when one of the valve bodies is opened, the remaining valve bodies are adapted to remain locked under the action of the interlocking mechanism. The valve body is a pair of solenoid valves; the interlocking mechanism includes a base, an interlocking plate, a pair of interlocking blocks, and a pair of interlocking rods. The base is installed on the valve body, the interlocking rods vertically pass through the solenoid valves and are connected to the valve stems inside the corresponding solenoid valves, the interlocking blocks are correspondingly installed on the top of the interlocking rods, and the interlocking plate is movably disposed on the base. When one of the solenoid valves is opened, the corresponding interlocking rod drives the interlocking block to move upward, thereby causing the interlocking plate to move so that the interlocking plate abuts against the top of the other interlocking block.

2. The variable temperature controlled local thin-walled integral injection mold as described in claim 1, characterized in that: The interlocking plate is horizontally and elastically mounted on the base via a rotating shaft, and the top of the interlocking plate has a pair of interlocking holes; When one of the solenoid valves is opened, the interlocking block engages with the corresponding interlocking hole in a wedge-shaped pressing action to drive the interlocking plate to rotate.

3. The variable temperature controlled local thin-walled integral injection mold as described in claim 1, characterized in that: The interlocking plate is horizontally and elastically slidably installed on the base, and the top of the interlocking plate has a pair of interlocking holes; When one of the solenoid valves is opened, the interlocking block engages with the corresponding interlocking hole in a wedge-shaped pressing action to drive the interlocking plate to move.

4. The variable temperature controlled local thin-walled integral injection mold as described in claim 2 or 3, characterized in that: The interlocking block has a wedge-shaped structure, and the wedge-shaped surfaces of the two interlocking blocks are arranged opposite each other, so that the interlocking plate can only cooperate with one of the interlocking blocks to realize the movement.

5. A variable temperature-controlled, locally thin-walled, one-piece injection mold, characterized in that, include: Mold body; Multiple pipe loop units, each disposed within the mold body and corresponding to the thin-walled region of the molded product, are connected in parallel. Multiple flow-disrupting elements are installed inside the pipes of the pipe loop unit; during injection molding, fluid is adapted to flow into multiple parallel pipe loop units simultaneously and be disturbed by the flow-disrupting elements, so that the fluid forms a turbulent state in the pipes. The variable temperature controlled local thin-walled integral molding injection mold also includes an interlocking mechanism and multiple valve bodies. The valve bodies are connected to the total input end of the multiple pipe circuit units through pipes and are correspondingly matched with different types of fluids. The interlocking mechanism is installed on the valve bodies and is used to realize the interlocking control between the valve bodies. During injection molding, when one of the valve bodies is opened, the remaining valve bodies are adapted to remain locked under the action of the interlocking mechanism. The valve body is a solenoid valve and has three of them; the interlocking mechanism includes a base, a pair of interlocking plates, three interlocking blocks, and three interlocking rods. The base is installed on the valve body. The interlocking rods vertically pass through the solenoid valves and are connected to the valve stems inside the corresponding solenoid valves. The interlocking blocks are installed at the top of the interlocking rods and are distributed in a straight line at intervals. The interlocking plates are elastically and horizontally slidably disposed on the base. The two interlocking plates are distributed in a straight line and are in abutting state under the action of elastic force. When one of the solenoid valves is opened, the corresponding interlocking rod drives the interlocking block to move upward to drive the corresponding interlocking plate to slide synchronously or relatively, so that the interlocking plate abuts against the top of the other interlocking blocks.

6. The variable temperature controlled local thin-walled integral injection mold as described in claim 5, characterized in that: The interlocking block has a wedge-shaped structure and is divided into a first wedge block and a pair of second wedge blocks. The first wedge block is located at the middle of the top of the base, and the second wedge blocks are located on both sides of the top of the base. Each of the two interlocking plates has a first locking port that cooperates with the first wedge block at one end, and each of the two interlocking plates has a second locking port that cooperates with the second wedge block at the top. When the first wedge block moves upward, it engages with the first locking jaw to drive the pair of interlocking plates to move away from each other and abut against the top of the second wedge block; when one of the second wedge blocks moves upward, it engages with the corresponding second locking jaw to drive the pair of interlocking plates to move synchronously and abut against the top of the other second wedge block and the top of the first wedge block.

7. The variable temperature controlled local thin-walled integral injection mold as described in claim 6, characterized in that: The first wedge block is in the shape of an isosceles trapezoid; the wedge surfaces of the two second wedge blocks are arranged opposite each other, so that the interlocking plate can only cooperate with one of the interlocking blocks to achieve sliding.

8. The variable temperature controlled local thin-walled integral injection mold as described in claim 1 or 5, characterized in that: The baffle is a plurality of protrusions disposed inside the pipe; or the baffle is a spiral blade inserted into the pipe.

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