High-precision injection molding system for 90-degree optical fiber array

Abstract

The invention provides a high-precision injection molding system for a 90-degree optical fiber array, and compared with the prior art, the high-precision injection molding system for the 90-degree optical fiber array comprises a mold of a substrate and a cover plate, a fuse machine, an injector, an adjusting module and a temperature adjusting module. The mold is precisely butted through the guide pin to form an independent mold cavity, and is matched with an injector to realize precise injection molding of the liquid ceramic-resin composite material. And the temperature adjusting module realizes accurate regulation and control of the temperature of the mold through dynamic preheating and cooling of heat conduction liquid. In the preheating stage, forming defects caused by temperature difference are eliminated by circularly preheating a mold; and in the cooling stage, stable cooling in the curing transition stage and efficient cooling after curing are ensured by adjusting the flow speed and the temperature of the cooling liquid in a segmented mode. According to the system, the quality consistency and the production efficiency of the 90-degree optical fiber array are effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of optical communication technology, and in particular to a high-precision injection molding system for a 90-degree optical fiber array. Background Art

[0002] The 90-degree array fiber optic board is a specially designed optical component that uses optical fibers arranged at a 90-degree angle. It is widely used in many fields such as optical communications, optical sensing, fiber integration, and laser systems. Through this unique fiber arrangement, the 90-degree array fiber optic board can effectively optimize the spatial distribution of optical fibers, improve signal transmission efficiency, and reduce signal loss and interference, thereby achieving more stable and efficient optical signal transmission. It has important applications in wavelength division multiplexing (WDM) systems, fiber-to-fiber coupling, and high-density fiber connections. Precise fiber docking, material selection, and fiber arrangement density are all key factors affecting performance. With the increasing requirements for integration and miniaturization, the 90-degree array fiber optic board will become a core component in future optoelectronic technologies, especially in high-speed, high-capacity optical communications and high-power laser systems, showing broad application prospects.

[0003] This experimental team has been browsing and studying a large amount of relevant records and materials on the relevant technologies of optical fiber arrays for a long time. At the same time, relying on relevant resources and conducting a large number of relevant experiments, after a large number of searches, it was found that the existing prior art, such as CN102101349B, CN111645259B and CN110320616B disclosed in the prior art, is a one-piece injection molding process for the appearance of an optical fiber connector disclosed in the prior art, including the following steps: S1: welding, welding the optical fiber bundle to the circuit board; S2: fixing, installing the optical fiber and the circuit board on the bottom shell; S3: heat conduction and heat insulation treatment; S4: assembling the base shell, installing the top shell to the bottom shell, so that the two are plugged in and riveted to form the base shell; S5: injection molding, forming an injection-molded shell by one-piece injection molding outside the base shell, and the injection molding temperature is 160-190°C; S6: connector test, performing a connection test on the molded optical fiber connector; S7: packaging.

[0004] The present invention is made to solve the problems commonly existing in the field of traditional injection molding technology, such as simple mold temperature control system, slow and uneven heating and cooling rates, which easily lead to uneven condensation of raw materials or unstable molding, affecting the consistency of products; the traditional process cannot fully meet the needs of high-performance optical fiber array components when the optical fiber arrangement density is high and the dimensional tolerance requirements are strict, etc. Summary of the invention

[0005] The purpose of the present invention is to propose a high-precision injection molding system for a 90-degree optical fiber array in view of the shortcomings currently existing in the art.

[0006] In order to overcome the shortcomings of the prior art, the present invention adopts the following technical solutions: A high-precision injection molding system for a 90-degree optical fiber array, the 90-degree optical fiber array comprising an L-shaped substrate, optical fibers sequentially fixed to the outer wall of the substrate, and an L-shaped cover plate capable of being sleeved and attached to the outer wall of the substrate, a plurality of parallel optical fiber grooves are continuously arranged on the L-shaped outer wall of the substrate, the optical fiber grooves accommodate optical fibers and arrange the optical fibers into an L-shaped layout, thereby realizing a 90-degree direction conversion of the optical fibers, the optical fibers are sequentially placed in each optical fiber groove, and finally a 90-degree arranged optical fiber array is formed, the cover plate is fixed to the outer wall of the substrate by an adhesive, thereby ensuring that the optical fibers are firmly fixed in the optical fiber grooves, The high-precision injection molding system includes a hot melt machine for hot-melting raw materials to obtain liquid raw materials, a mold with a substrate and a cover plate shape, an adjustment module for fixing and adjusting the mold, a syringe connected to the hot melt machine and injecting the liquid raw materials into each mold at the same time, and a temperature adjustment module for auxiliary regulation of the temperature of the mold, wherein the raw material is a ceramic-resin composite material.

[0007] Furthermore, the mold includes an upper mold, a lower mold that can be clamped and fixed with the upper mold, a plurality of upper mold cavities independently arranged on the upper mold, and a plurality of lower mold cavities independently arranged on the lower mold, each upper mold cavity has a matching lower mold cavity, and the matching upper mold cavity and lower mold cavity form an independent unit mold cavity, and one part of the unit mold cavity is in the shape of a substrate and the other part is in the shape of a cover plate.

[0008] Further, the adjustment module includes a support base for supporting the lower mold, two upper support arms symmetrically arranged on both sides of the upper mold, a support column with the top fixedly connected to the upper support arms and the bottom fixed to the support base plate, two lower support arms symmetrically arranged on both sides of the upper mold, an electric drive lifting device fixedly connected to the top of the lower support arms and the bottom fixed to the support base, and a plurality of ultrasonic generators evenly laid on the side walls of the lower mold. During the mold closing stage, the electric-driven lifting device accurately controls the rise of the lower mold to ensure that the lower mold is accurately docked with the upper mold to prevent manufacturing errors caused by mold misalignment. After the injection molding is completed, the electric-driven lifting device moves downward to separate the upper mold from the lower mold, thereby completing the demolding operation and ensuring that the mold is opened smoothly and the molded substrate and cover are taken out.

[0009] Further, the upper mold is provided with a plurality of material receiving ports and vents, each unit mold cavity is respectively connected with a material receiving port and a vent, the upper mold is provided with a plurality of first circulation channels, the lower mold is provided with a plurality of second circulation channels, the first circulation channels and the upper mold cavity are independently provided, the second circulation channels and the lower mold cavity are independently provided, each first circulation channel is sequentially surrounded by a different upper mold cavity, each second circulation channel is sequentially surrounded by a different lower mold cavity, The syringe is provided with a plurality of distribution channels, each of which is connected to an injection nozzle, each of which is connected to a material receiving port, and the flow rate of the liquid raw material delivered by each injection nozzle is adjusted by the valve of each distribution channel. The syringe delivers a quantitative amount of liquid raw material to each unit mold cavity through the plurality of injection nozzles.

[0010] Furthermore, the first circulation channel includes a first liquid inlet and a first liquid outlet provided on the surface of the upper mold, and the first circulation channel is in a spiral tube shape in the upper mold.

[0011] Furthermore, the second circulation channel includes a second liquid inlet arranged on the surface of the lower mold and a second liquid outlet arranged on the surface of the lower mold, and the second circulation channel is in a spiral tube shape in the lower mold.

[0012] Furthermore, the temperature regulating module includes a liquid collecting box, a water source box storing heat transfer liquid, a first liquid outlet pipe with one end connected to the water source box, a first electric valve for controlling the connection between the first liquid outlet pipe and the water source box, a second liquid outlet pipe with one end connected to the water source box, a second electric valve for controlling the connection between the second liquid outlet pipe and the water source box, a first liquid pump for controlling the flow rate of the heat transfer liquid in the water source box from the first liquid outlet pipe, a second liquid pump for controlling the flow rate of the heat transfer liquid in the water source box from the second liquid outlet pipe, a heater for heating the first liquid outlet pipe to control the heating temperature of the heat transfer liquid transported by the first liquid outlet pipe, a cooler for cooling the second liquid outlet pipe to control the cooling temperature of the heat transfer liquid transported by the second liquid outlet pipe, and a plurality of branches sequentially connected to all the first liquid outlet pipes. A first collecting pipe with a liquid inlet and a second liquid inlet, a second collecting pipe sequentially connecting all the first liquid outlets and the second liquid outlets through a plurality of branches, a plurality of temperature sensors respectively used to monitor the temperature of each branch of the second collecting pipe, a Y-type connecting pipe with three branches, three electric control valves respectively used to control the closing conditions of the three branches of the Y-type connecting pipe, a first connector connecting one branch of the Y-type connecting pipe with the other end of the first liquid outlet, a second connector connecting one branch of the Y-type connecting pipe with the other end of the second liquid outlet, a third connector connecting one branch of the Y-type connecting pipe with one branch of the first collecting pipe, and a control unit used to control the operating temperature of the heater and the cooler according to the injection molding conditions of the mold.

[0013] The beneficial effects achieved by the present invention are: 1. Improve product quality and consistency: Through precise mold temperature control and ultrasonic vibration treatment, material defects caused by bubbles and temperature differences are significantly reduced, ensuring the quality consistency and structural stability of the 90-degree optical fiber array substrate and cover.

[0014] 2. Optimize production efficiency: The temperature and flow rate of the coolant are adjusted in sections, combined with historical data analysis and multi-dimensional optimization algorithms to achieve full process optimization from preheating to cooling, greatly shortening the production cycle and improving the injection molding efficiency of substrates and cover plates.

[0015] 3. It provides reliable support for the injection molding of complex 90-degree optical fiber arrays, meeting the high-performance manufacturing needs in the field of optical communications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0017] Figure 1 It is a schematic top view of a part of the structure of the lower mold of the present invention.

[0018] Figure 2 It is one of the structural schematic diagrams of the lower mold cavity of the present invention.

[0019] Figure 3 It is another structural schematic diagram of the lower mold cavity of the present invention.

[0020] Figure 4 It is a schematic front view of a partial structure of the lower mold of the present invention.

[0021] Explanation of the accompanying drawings: 1-lower mold cavity; 2-second circulation channel; 3-lower support arm; 4-guide pin hole; 5-second liquid inlet; 6-second liquid outlet. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described in detail in combination with its embodiments below; it should be pointed out that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present case. For those skilled in the art, after reviewing the following detailed description, other systems, methods and / or features of this embodiment will become apparent. And the terms describing the positional relationship in the accompanying drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0023] Embodiment 1: Combining with Figure 1 , Attachment Figure 2 , Attachment Figure 3 and attached Figure 4 The present embodiment constructs a high-precision injection molding system for a 90-degree optical fiber array. The 90-degree optical fiber array comprises an L-shaped substrate, optical fibers fixed to the outer wall of the substrate in sequence, and an L-shaped cover plate that can be sleeved and attached to the outer wall of the substrate. A plurality of parallel optical fiber grooves are continuously arranged on the L-shaped outer wall of the substrate. These optical fiber grooves accommodate optical fibers and arrange the optical fibers into an L-shaped layout, thereby realizing a 90-degree direction conversion of the optical fibers. The optical fibers are sequentially placed in each optical fiber groove to finally form a 90-degree arranged optical fiber array. The cover plate is fixed to the outer wall of the substrate by an adhesive to ensure that the optical fibers are firmly fixed in the optical fiber grooves.

[0024] The high-precision injection molding system includes a hot melt machine for hot-melting raw materials to obtain liquid raw materials, a mold with a substrate and a cover plate shape, an adjustment module for fixing and adjusting the mold, a syringe connected to the hot melt machine and injecting the liquid raw materials into each mold at the same time, and a temperature adjustment module for auxiliary regulation of the temperature of the mold, wherein the raw material is a ceramic-resin composite material.

[0025] The mold includes an upper mold, a lower mold that can be clamped and fixed with the upper mold, a plurality of upper mold cavities independently arranged on the upper mold, and a plurality of lower mold cavities independently arranged on the lower mold. Each upper mold cavity has a matching lower mold cavity. The matching upper mold cavity and lower mold cavity form an independent unit mold cavity, and one part of the unit mold cavity is in the shape of a substrate and the other part is in the shape of a cover plate.

[0026] Pairs of guide pins and guide pin holes are respectively arranged on the contact surfaces of the upper mold and the lower mold, wherein the guide pins are arranged on the upper mold, and the guide pin holes are arranged on the lower mold. The guide pins and the guide pin holes are precisely matched to ensure that the upper mold and the lower mold can be accurately docked during the mold closing process to avoid manufacturing errors caused by displacement or misalignment. The number of pairs of guide pins and guide pin holes is greater than the number of unit cavities.

[0027] The adjustment module includes a support base for supporting the lower mold, two upper support arms symmetrically arranged horizontally on both sides of the upper mold, a support column with the top fixedly connected to the upper support arms and the bottom fixed to the support base plate, two lower support arms symmetrically arranged horizontally on both sides of the upper mold, an electrically driven lifting device fixedly connected to the top of the lower support arms and the bottom fixed to the support base, and a plurality of ultrasonic generators evenly laid on the side walls of the lower mold.

[0028] The top wall of each of the lower support arms is provided with at least one fixing groove, and the bottom wall of each of the support arms is provided with through-holes arranged opposite to the fixing grooves in sequence. A nut is rotatably sleeved in each through-hole through a double-row ball bearing ring, and a sealing ring is provided at the edge of the through-hole to prevent dust or impurities from entering the bearing and ensure the smooth operation of the nut. The inner groove wall of the fixing groove is provided with a thread that is threadably engaged with the nut. A reduction motor for driving the nut to rotate its axis in the through-hole is fixed to the upper support arm through a mounting seat, and the reduction motor is connected to the nut through gear transmission, worm transmission, chain transmission, ball screw or direct drive.

[0029] The reduction motor can be driven in both directions. The reduction motor has a built-in encoder that can monitor the rotation angle and speed of the nut in real time. Torque sensors for monitoring the stress state of the nut are installed around the penetration port. When the force monitored by the torque sensor exceeds the safety threshold, the reduction motor automatically stops operating.

[0030] During the mold closing stage, the electric-driven lifting device drives the lower mold to rise slowly through the electric-driven lifting device. When the lower mold approaches the upper mold, the guide pin and the guide pin hole begin to dock. The bidirectional rotation drive reduction motor can drive the nut to rotate clockwise during the mold closing process based on the real-time feedback data of the torque sensor, so that the nut is respectively engaged and fixed in each fixed groove to lock the upper mold and the lower mold.

[0031] After the injection molding is completed, the electric-driven lifting device lowers the lower mold at a controlled speed, and at the same time, the drive nut of the reduction motor rotates counterclockwise, so that the nut moves out of each fixed groove to separate the upper mold from the lower mold, thereby completing the demoulding operation and ensuring that the mold is opened smoothly and the molded substrate and cover are taken out.

[0032] The ultrasonic generators are evenly arranged on the side walls of the lower mold and are used to process the liquid raw materials in the unit mold cavity through ultrasonic vibration during the injection molding process. The main function is to eliminate tiny bubbles in the liquid raw materials. The high-frequency vibration of ultrasonic waves can significantly reduce the bubbles in the liquid raw materials, improve the fluidity of the materials, and ensure the uniformity and density of the liquid raw materials during the injection molding process, thereby avoiding the impact of bubbles on the quality of the final product.

[0033] The upper mold is provided with a plurality of material receiving ports and air vents, and each unit mold cavity is respectively connected to a material receiving port and a air vent. The upper mold is provided with a plurality of first circulation channels, and the lower mold is provided with a plurality of second circulation channels. The first circulation channels and the upper mold cavity are independently provided, and the second circulation channels and the lower mold cavity are independently provided. Each first circulation channel is sequentially surrounded by a different upper mold cavity, and each second circulation channel is sequentially surrounded by a different lower mold cavity.

[0034] A plurality of distribution channels are arranged in the syringe, each of which is connected to an injection nozzle, each of which is connected to a material receiving port, and the flow rate of the liquid raw material delivered by each injection nozzle is adjusted by the valve of each distribution channel. The syringe delivers a quantitative amount of liquid raw material to each unit mold cavity through the plurality of injection nozzles, and the unit mold cavity of the same shape receives the same amount of liquid raw material each time, thereby ensuring the quality consistency and high precision during the injection molding process.

[0035] The first circulation channel comprises a first liquid inlet and a first liquid outlet arranged on the surface of the upper mold, and the first circulation channel is in a spiral tube shape in the upper mold.

[0036] The second circulation channel comprises a second liquid inlet and a second liquid outlet arranged on the surface of the lower mold, and the second circulation channel is in a spiral tube shape in the lower mold.

[0037] The temperature regulating module comprises a liquid collecting box, a water source box storing heat transfer liquid, a first liquid outlet pipe with one end connected to the water source box, a first electric valve for controlling the connection between the first liquid outlet pipe and the water source box, a second liquid outlet pipe with one end connected to the water source box, a second electric valve for controlling the connection between the second liquid outlet pipe and the water source box, a first liquid pump for controlling the flow speed of the heat transfer liquid in the water source box from the first liquid outlet pipe, a second liquid pump for controlling the flow speed of the heat transfer liquid in the water source box from the second liquid outlet pipe, a heater for heating the first liquid outlet pipe to control the heating temperature of the heat transfer liquid transported by the first liquid outlet pipe, a cooler for cooling the second liquid outlet pipe to control the cooling temperature of the heat transfer liquid transported by the second liquid outlet pipe, and a plurality of branches sequentially connected to all the first inlets. A first collecting pipe for a liquid inlet and a second liquid inlet, a second collecting pipe sequentially connecting all the first liquid outlets and the second liquid outlets through a plurality of branches, a plurality of temperature sensors respectively used to monitor the temperature of each branch of the second collecting pipe, a Y-type connecting pipe with three branches, three electrically controlled valves respectively used to control the closing conditions of the three branches of the Y-type connecting pipe, a first connector connecting one branch of the Y-type connecting pipe with the other end of the first liquid outlet pipe, a second connector connecting one branch of the Y-type connecting pipe with the other end of the second liquid outlet pipe, a third connector connecting one branch of the Y-type connecting pipe with one branch of the first collecting pipe, and a control unit used to control the operating temperature of the heater and the cooler according to the injection molding conditions of the mold.

[0038] The heat transfer liquid is silicone oil or high-temperature heat transfer oil. Those skilled in the art can select the heater from existing tubular electric heaters, steam heat exchangers or electromagnetic heaters according to actual needs, and the cooler from existing compression refrigerators, water-cooled heat exchangers or thermoelectric refrigerators and other equipment, without limitation.

[0039] The temperature regulating module first stores and supplies the heat transfer liquid through the water source tank, and the heat transfer liquid enters the heater through the first liquid outlet pipe or enters the cooler through the second liquid outlet pipe.

[0040] Before the syringe injects liquid raw materials into the mold, the temperature regulating module presets the mold. During the mold preheating stage, the first electric valve and the heater are turned on, and the heated heat transfer liquid is transported to the first collecting pipe through the Y-shaped connecting pipe and flows into the first circulation channel and the second circulation channel, so as to achieve rapid heating of the mold.

[0041] After the syringe completes the injection molding of the liquid raw material into the mold, the temperature regulating module cools the mold. During the mold cooling stage, the second electric valve and the cooler are opened, and the path is switched through the Y-type connecting pipe to transport the cooled heat transfer liquid to the first collecting pipe and enter the first circulation channel and the second circulation channel to reduce the mold temperature.

[0042] The control unit monitors the temperature of the heat transfer liquid in real time, dynamically adjusts the working status of the heater and the cooler, and controls the flow rate of the heat transfer liquid entering the first circulation channel and the second circulation channel, so as to stabilize the liquid raw material in the mold.

[0043] The heat transfer liquid in the first circulation channel and the second circulation channel is recovered to the liquid collection tank through the second collecting pipe, so as to realize liquid recycling, reduce resource consumption and improve system efficiency.

[0044] The high-precision injection molding system of the present invention realizes the optimization of the whole process from raw material processing to product demolding through modular design and precise control. The system of the present invention effectively solves the problems of mold misalignment, bubble residue, and uneven material defects caused by temperature difference in traditional injection molding processes, greatly improves the injection molding quality and production efficiency, and meets the stringent requirements of the optical communication field for high-performance microporous plates.

[0045] Embodiment 2: Combining with Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 In addition to the contents of the above embodiments, the control unit implements the following operation steps: S101: Before the syringe injects the liquid raw material into the mold, the heater is controlled to heat the heat transfer liquid to the preheating temperature TR, and at the same time, the first liquid pump controls the heat transfer liquid to flow in the first liquid outlet pipe at a preset flow rate Vr1 until the minimum temperature of all branch pipes in the second manifold is TR-r, and the preheating operation of the mold is completed, wherein TR∈[135℃, 200℃], r is a fluctuation value, r∈[20℃, 30℃], ℃ is degrees Celsius, S102: After the syringe completes the injection molding of the liquid raw material into the mold, the mold is cooled, and the second liquid pump drives the heat transfer liquid to flow in the second liquid outlet pipe at a flow rate Vr2, and the cooler cools the heat transfer liquid to a temperature of Td until Tem max When the preset cooling temperature Tex is reached, the cooling process is completed, the substrate and cover plate in the mold are solidified, and the demolding conditions are met.

[0046] During the cooling stage, the specific operating parameters of Td and Vr2 are as follows: , , Among them, V1 is a slow flow rate, V2 is a gentle flow rate, V3 is a fast flow rate, Trf is the melting point of the raw material, μ is the adjustment parameter, Tem max It is the maximum temperature of all branches in the second collecting pipe currently monitored by the temperature sensor in real time, μ∈[10℃,25℃], V1<V2<V3, V3∈[10L / min,25L / min], V2∈[7L / min,15L / min], V1∈[3L / min,6L / min].

[0047] Among them, Td1, Td2 and Td3 are obtained by the following calculation: , α is the slow cooling coefficient, α∈[0.6,0.9]; , β1 is the steady cooling coefficient, β2 is the logarithmic correction coefficient used to adjust the dynamic change of steady cooling, β1∈[0.3,0.6], β2∈[0.1,0.4]; , γ is the rapid cooling coefficient, γ∈[0.3,0.7].

[0048] The operating code of the control unit is as follows: class TemperatureControlUnit: def __init__(self, tr_min, tr_max, r_min, r_max, vr1_min, vr1_max,vr2_min, vr2_max): self.TR_min = tr_min self.TR_max = tr_max self.r_min = r_min self.r_max = r_max self.Vr1_min = vr1_min self.Vr1_max = vr1_max self.Vr2_min = vr2_min self.Vr2_max = vr2_max self.current_temperature = 0 def preheat(self, TR, Vr1): print(f"Starting preheat process: Target Temperature = {TR}℃, FlowRate = {Vr1} L / min") while True: self.current_temperature += (TR - self.current_temperature) * 0.1 min_temp = self.current_temperature - (self.r_min + self.r_max) / 2 print(f"Current Temperature: {self.current_temperature:.2f}℃,Minimum Temperature: {min_temp:.2f}℃") if min_temp>= TR - self.r_max: print("Preheat process complete.") break def cool_down(self, Td, Vr2, Tex): print(f"Starting cooling process: Cooling Temperature = {Td}℃, FlowRate = {Vr2} L / min") while True: self.current_temperature -= (self.current_temperature - Td) * 0.1 print(f"Current Temperature: {self.current_temperature:.2f}℃") if self.current_temperature<= Tex: print("Cooling process complete. Mold ready for demolding.") break TR = 150 r = 25 Vr1 = 5 Vr2 = 15 Td = 50 Tex = 30 tcu = TemperatureControlUnit(tr_min=135, tr_max=200, r_min=20, r_max=30, vr1_min=3, vr1_max=6, vr2_min=7, vr2_max=25) print("--- S101: Preheat Phase ---") tcu.preheat(TR, Vr1) print("--- S102: Cooling Phase ---") tcu.cool_down(Td, Vr2, Tex).

[0049] In this embodiment, the specific values ​​of parameters α, β1, β2, γ, μ, V1, V2, and V3 are derived from historical data analysis, experimental calibration, working condition simulation, multidimensional optimization algorithm, and comprehensive adjustment of actual operating conditions. The key influencing factors are extracted by analyzing the historical operating data, and the specific effects of different parameters on the cooling effect of the mold are verified by combining experimental calibration. Then, the contribution ratio of the parameters is optimized by numerical simulation and multidimensional optimization algorithm, and dynamically adjusted in actual production conditions to ensure that the parameter values ​​meet the production quality of the substrate and cover plate while achieving maximum optimization of the injection molding production efficiency of the substrate and cover plate. The control unit realizes dynamic adjustment of the mold temperature through precise preheating and cooling control to meet the needs of the injection molding process. In the preheating stage, the heater is controlled to heat the heat transfer liquid to the preset temperature TR, and circulates it through the first liquid outlet pipe at a flow rate Vr1, so that the mold can reach a uniform preheating state, eliminating molding defects that may be caused by excessive initial temperature difference of the mold.

[0050] During the transition stage of raw material solidification, in order to ensure the uniformity of temperature distribution in the mold and avoid stress or cracks caused by rapid temperature changes during the raw material solidification process, the cooling process is made smoother by reducing the flow rate of the coolant. On the contrary, when the raw material is solidified, in order to improve production efficiency, the flow rate of the coolant is gradually increased to quickly take away the heat and accelerate the cooling of the entire mold, ensuring that the mold temperature reaches the preset cooling temperature as soon as possible to create conditions for demolding operations.

[0051] The control unit of the present invention achieves precise management of the mold temperature by optimizing the entire process of preheating, cooling and dynamic control, meets the temperature requirements at different stages of the injection molding process, not only improves the cooling efficiency, but also significantly improves the quality of the substrate and cover plate and the consistency of material properties, providing reliable support for the efficient production of complex 90-degree optical fiber arrays.

[0052] Although the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the present invention. That is, the methods, systems and devices discussed above are examples. Various configurations may appropriately omit, replace or add various processes or components. For example, in alternative configurations, the method may be performed in an order different from that described, and / or various components may be added, omitted and / or combined. Moreover, the features described with respect to certain configurations may be combined in various other configurations, such as different aspects and elements of the configuration may be combined in a similar manner. In addition, as technology develops, the elements therein may be updated, i.e., many elements are examples and do not limit the scope of the present disclosure or claims. And it should be understood that after reading the contents of the record of the present invention, the technician may make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

Claims

1. A high-precision injection molding system for a 90-degree optical fiber array, the 90-degree optical fiber array comprising an L-shaped substrate, optical fibers sequentially fixed to the outer wall of the substrate, and an L-shaped cover plate that can be sleeved and attached to the outer wall of the substrate, the L-shaped outer wall of the substrate is continuously provided with a plurality of parallel optical fiber grooves, the optical fiber grooves accommodate the optical fibers and arrange the optical fibers into an L-shaped layout, thereby realizing a 90-degree direction conversion of the optical fibers, the optical fibers are sequentially placed in each optical fiber groove, and finally a 90-degree arranged optical fiber array is formed, the cover plate is fixed to the outer wall of the substrate by an adhesive, thereby ensuring that the optical fibers are firmly fixed in the optical fiber grooves, It is characterized in that The high-precision injection molding system includes a hot melt machine for hot-melting raw materials to obtain liquid raw materials, a mold with a substrate and a cover plate shape, an adjustment module for fixing and adjusting the mold, a syringe connected to the hot melt machine and injecting the liquid raw materials into each mold at the same time, and a temperature adjustment module for auxiliary regulation of the temperature of the mold, wherein the raw material is a ceramic-resin composite material.

2. The high-precision injection molding system according to claim 1, characterized in that: The mold includes an upper mold, a lower mold that can be clamped and fixed with the upper mold, a plurality of upper mold cavities independently arranged on the upper mold, and a plurality of lower mold cavities independently arranged on the lower mold. Each upper mold cavity has a matching lower mold cavity. The matching upper mold cavity and lower mold cavity form an independent unit mold cavity, and one part of the unit mold cavity is in the shape of a substrate and the other part is in the shape of a cover plate.

3. The high-precision injection molding system according to claim 2, characterized in that: The adjustment module includes a support base for supporting the lower mold, two upper support arms symmetrically arranged on both sides of the upper mold, a support column with the top fixedly connected to the upper support arms and the bottom fixed to the support base plate, two lower support arms symmetrically arranged on both sides of the upper mold, an electric drive lifting device with the top fixedly connected to the lower support arms and the bottom fixed to the support base, and a plurality of ultrasonic generators evenly laid on the side walls of the lower mold. During the mold closing stage, the electric-driven lifting device accurately controls the rise of the lower mold to ensure that the lower mold is accurately docked with the upper mold to prevent manufacturing errors caused by mold misalignment. After the injection molding is completed, the electric-driven lifting device moves downward to separate the upper mold from the lower mold, thereby completing the demolding operation and ensuring that the mold is opened smoothly and the molded substrate and cover are taken out.

4. The high-precision injection molding system according to claim 3, characterized in that: The upper mold is provided with a plurality of material receiving ports and vents, each unit mold cavity is respectively connected with a material receiving port and a vent, the upper mold is provided with a plurality of first circulation channels, the lower mold is provided with a plurality of second circulation channels, the first circulation channels and the upper mold cavity are independently provided, the second circulation channels and the lower mold cavity are independently provided, each first circulation channel is sequentially surrounded by a different upper mold cavity, and each second circulation channel is sequentially surrounded by a different lower mold cavity. The syringe is provided with a plurality of distribution channels, each of which is connected to an injection nozzle, each of which is connected to a material receiving port, and the flow rate of the liquid raw material delivered by each injection nozzle is adjusted by the valve of each distribution channel. The syringe delivers a quantitative amount of liquid raw material to each unit mold cavity through the plurality of injection nozzles.

5. The high-precision injection molding system according to claim 4, characterized in that: The first circulation channel comprises a first liquid inlet and a first liquid outlet arranged on the surface of the upper mold, and the first circulation channel is in a spiral tube shape in the upper mold.

6. The high-precision injection molding system according to claim 5, characterized in that: The second circulation channel comprises a second liquid inlet and a second liquid outlet arranged on the surface of the lower mold, and the second circulation channel is in a spiral tube shape in the lower mold.

7. The high-precision injection molding system according to claim 6, characterized in that: The temperature regulating module comprises a liquid collecting box, a water source box storing heat transfer liquid, a first liquid outlet pipe with one end connected to the water source box, a first electric valve for controlling the connection between the first liquid outlet pipe and the water source box, a second liquid outlet pipe with one end connected to the water source box, a second electric valve for controlling the connection between the second liquid outlet pipe and the water source box, a first liquid pump for controlling the flow speed of the heat transfer liquid in the water source box from the first liquid outlet pipe, a second liquid pump for controlling the flow speed of the heat transfer liquid in the water source box from the second liquid outlet pipe, a heater for heating the first liquid outlet pipe to control the heating temperature of the heat transfer liquid transported by the first liquid outlet pipe, a cooler for cooling the second liquid outlet pipe to control the cooling temperature of the heat transfer liquid transported by the second liquid outlet pipe, and a plurality of branches sequentially connected to all the first inlets. A first collecting pipe for a liquid inlet and a second liquid inlet, a second collecting pipe sequentially connecting all the first liquid outlets and the second liquid outlets through a plurality of branches, a plurality of temperature sensors respectively used to monitor the temperature of each branch of the second collecting pipe, a Y-type connecting pipe with three branches, three electrically controlled valves respectively used to control the closing conditions of the three branches of the Y-type connecting pipe, a first connector connecting one branch of the Y-type connecting pipe with the other end of the first liquid outlet pipe, a second connector connecting one branch of the Y-type connecting pipe with the other end of the second liquid outlet pipe, a third connector connecting one branch of the Y-type connecting pipe with one branch of the first collecting pipe, and a control unit used to control the operating temperature of the heater and the cooler according to the injection molding conditions of the mold.

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