A mold and injection molding method for precision parts

Abstract

The application relates to the technical field of injection molding, and discloses a special mold for precise parts and an injection molding method, wherein the special mold comprises a mold body, an upper mold and a lower mold, a sprue seat arranged on the mold body, a flow guide seat connected with the sprue seat, two lower pressing pieces symmetrically arranged in the mold, a mold base arranged in the mold and communicated with the flow guide seat, a plurality of air pipes arranged in the mold, and a blowing unit communicated with the air pipes; the blowing unit is arranged in the mold base and used for cooling and demolding of an injection molded part in the mold base; through cooperation between an exhaust valve and an air inlet valve, the amount of gas in a control assembly is adjusted and controlled, so that a guide rod can reciprocate in the control assembly, the gas in the control assembly is compressed, the gas can be sprayed from a jet seat, and demolding between the injection molded part and the mold in the axial direction is completed.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, specifically to a special mold for precision parts and an injection molding method. Background Technology

[0002] Injection molds are the core tools for mass production of plastic products. By injecting molten plastic into its cavity and allowing it to cool and solidify, the desired product shape is ultimately obtained.

[0003] Its core consists of two parts: a moving mold and a fixed mold. During operation, the two close to form a cavity, and when the mold opens, the product is ejected. The mold has a precise structure, including key components such as a gating system, a guiding mechanism, and an ejection mechanism. It needs to be designed specifically according to the properties of the plastic and the shape of the product, and is widely used in the automotive, home appliance, and medical fields.

[0004] For example, Chinese Patent CN102990865B discloses a tube injection mold, including a front mold, a rear mold, a core assembly, and a tensioning device. The front mold and the rear mold cooperate to form an injection cavity, which consists of a sprue channel connected to the mold gating system and several product forming cavities, each connected to the sprue channel. The tensioning device includes a hydraulic cylinder mounted below the front mold via a bracket and a pull block mounted on the end of the piston rod. The core assembly consists of several cores. Each core is installed in a product forming cavity, with its upper end fixed to the upper end of the product forming cavity and its lower end connected to the pull block. Each product forming cavity and a core cooperate to form a tube cavity. The piston rod and the pull block are fixedly connected by a nut.

[0005] However, existing technical solutions still have some problems. After injection molding, the molded part is located inside the mold. Therefore, during the demolding process, a certain pushing force is generally provided to the molded part through a cylinder or air blowing equipment, so that the molded part can move away from the mold base and complete the demolding work. In this process, most existing demolding equipment completes the demolding by applying axial force to the molded part. However, the inner wall of the molded part will also come into contact with the mold base. If the inner wall of the molded part sticks to the mold base during axial pushing, it will lead to damage to the molded part.

[0006] Therefore, how to demold the injection molded parts is a problem that needs to be solved. Summary of the Invention

[0007] This invention provides a special mold for precision parts and an injection molding method to solve the above-mentioned problems existing in the prior art.

[0008] A special mold for precision parts, comprising:

[0009] The mold body includes an upper mold and a lower mold, a sprue seat disposed on the mold body, a flow guide seat connected to the sprue seat, two pressure members symmetrically disposed in the mold, a mold base located inside the mold and communicating with the flow guide seat, multiple air pipes disposed in the mold, and an air blowing unit communicating with the air pipes.

[0010] The air blowing unit is located inside the mold base and is used to cool and demold the injection molded parts in the mold base. It also includes an air pump connected to the air pipe. The air pump can supply air to the air blowing unit. The air blowing unit can adjust the direction of airflow, so that the airflow can flow in the axial and circumferential directions. The axial airflow can impact the bottom of the injection molded parts, so that the injection molded parts can be separated from the mold base. The circumferential airflow can cool and dissipate heat from the injection molded parts, and at the same time, it can also separate the inner wall of the injection molded parts from the mold base, completing the secondary demolding of the injection molded parts.

[0011] Furthermore, the air blowing unit includes two mounting seats disposed at the bottom of the mold base, an exhaust pipe for connecting the two mounting seats, a demolding component and a control component disposed on one of the mounting seats, and an adjustment component disposed on the other mounting seat; the mounting seats are provided with an exhaust valve and an air inlet valve.

[0012] The control component is used to adjust the position of the demolding component, thereby changing the impact force of the airflow during demolding, and can complete the demolding work for different injection molded parts;

[0013] The exhaust pipe is provided with multiple air outlets around its circumference;

[0014] The regulating component is connected to multiple air pipes. By adjusting the movement of the regulating component, the flow direction of the gas is changed, so that the airflow can contact the bottom and inner wall of the injection molded part and generate an impact force to complete the demolding of the injection molded part.

[0015] Furthermore, the control component includes a drive handle disposed on the mounting base and slidably connected to the mounting base, the drive handle having a plurality of gear teeth, an adjusting gear meshing with the gear teeth, and a guide tube connected to the adjusting gear;

[0016] The guide tube is sleeved on the demolding assembly. By rotating the guide tube, its position relative to the demolding assembly is adjusted, thereby changing the impact force of the airflow and completing the demolding of the injection molded part.

[0017] Furthermore, the demolding assembly includes a vent seat that abuts against the mounting base, a guide rod connected to the vent seat, a return spring for connecting the vent seat and the guide tube, a first groove disposed at one end of the guide rod along the axis of the guide rod, and a second groove that communicates with the first groove and is disposed in the circumferential direction of the guide rod.

[0018] The guide tube is sleeved on the guide rod. By rotating the guide tube, the overlap area between the second groove and the guide tube is changed, thereby changing the impact force of the airflow.

[0019] The vent seat is provided with at least two vent holes.

[0020] Furthermore, the mounting base is provided with an air inlet, a flow channel on the guide tube, a jet seat screwed to the mounting base, a sealing rod disposed in the jet seat, a jet pipe connected to the jet seat, and a sealing spring for connecting the jet pipe and the sealing rod;

[0021] One end of the sealing rod is mushroom-shaped and has a pre-set sealing gasket;

[0022] The jet pipe is provided with a jet channel, which is used to connect the jet nozzle on the jet seat and the area between the jet pipe and the jet seat;

[0023] A gap is pre-set between one end of the drainage channel and the air inlet, and the other end of the drainage channel is connected to the inside of the guide tube.

[0024] Furthermore, there is a first space between the end of the guide rod near the sealing rod and the inner wall of the sealing rod and the guide tube. The first space is used for gas storage. By moving the sealing rod, the gas in the first space is compressed, so that the gas can impact the sealing rod, change the deformation of the sealing spring, and make the gas spray out from the jet seat, thereby completing the demolding of the injection molded part.

[0025] Furthermore, the adjustment assembly includes a push tube built into the mounting base, a push spring for connecting the push tube and the mounting base, a plurality of air holes opened in the circumferential direction of the push tube, and a plurality of sealing rings disposed between the push tube and the mounting base;

[0026] The mold is equipped with an adjusting cylinder, and the output end of the adjusting cylinder is connected to the propulsion tube.

[0027] The propulsion tube has a U-shaped structure. By adjusting the movement of the cylinder, the propulsion tube can be moved forward, thereby changing the direction of airflow.

[0028] Furthermore, the adjustment assembly also includes an inner tube disposed within the mounting base, a support spring connected to the inner tube, a plug connected to the support spring and abutting against the mounting base, and a sealing ring disposed between the plug and the mounting base.

[0029] By controlling the movement of the plunger, gas can be introduced into the control assembly, enabling the control assembly to perform intermittent inflation.

[0030] Furthermore, the mounting base is also provided with an annular first chamber and a second chamber disposed between the mounting base and the inner tube, and a plurality of air jet passages are opened on the mounting base to connect the first chamber and the second chamber;

[0031] By moving the propulsion tube, the piston moves, thereby connecting the air holes on the propulsion tube with the first chamber, allowing airflow to enter the second chamber and achieving axial airflow injection.

[0032] An injection molding method includes the following steps:

[0033] S1: When injection molding is required, the upper mold and the lower mold are in the closed state. The injection material is injected into the guide seat through the sprue seat, and then enters the mold base through the guide pipe on the guide seat, thereby completing the molding of the injection part.

[0034] S2: After the injection molded part is formed, the air cylinder before air supply drives the push tube to move and adjust the position of the air pipe in the axial direction of the mounting seat so that the air hole is aligned with the exhaust pipe area; after the air pump supplies air, one of the gas enters the exhaust pipe through the adjustment component and then exits from its air outlet to impact the inner wall of the injection molded part, causing it to detach from the mold and complete the initial demolding.

[0035] S3: After initial demolding, the regulating cylinder is activated again, pushing the propulsion tube to move the plunger within the mounting base, thus connecting the first chamber with the air hole; gas enters the first chamber through the propulsion tube and air hole, and then flows into the second chamber, providing power to the control components to drive their movement;

[0036] S4: During the secondary demolding, another stream of gas enters the mounting base through the air inlet and flows into the first space formed by the first groove and the second groove along the drainage channel; the adjusting component injects axial gas to push the plunger to move in the guide tube, squeezing the gas in the first space to open the sealing rod, thereby realizing the axial secondary demolding of the injection molded part;

[0037] S5: When adjusting the airflow impact force, the drive handle drives the adjustment gear to rotate, which in turn drives the guide tube to rotate, adjusting the connection position between the second groove and the drainage channel; when the guide rod moves beyond the preset area, the first groove and the second groove connect the first space with the drainage channel, instantly reducing the pressure in the first space and allowing the sealing rod to reset; by reducing the displacement of the guide rod, the gas pressure in the first space is changed, thereby achieving the adjustment of the axial demolding airflow speed;

[0038] S6: Finally, the gas ejected from the sealing rod can be ejected from the jet seat through the jet pipe and contact the bottom of the injection molded part, so that the injection molded part can be separated from the mold, and the injection molded part can be demolded for a second time, thus completing the injection molding production of the injection molded part.

[0039] Beneficial Effects: This invention discloses a special mold for precision parts and an injection molding method. To complete the demolding of the injection molded part, the device is equipped with an adjustment component. By operating the adjustment component, gas can be discharged from the circumferential air outlet of the exhaust pipe, thereby causing the injection molded part to detach radially from the mold base. Then, by adjusting the cylinder, the operating mode of the adjustment component is changed, so that the push pipe abuts against the plunger and pushes the plunger to move a predetermined distance, allowing gas to enter the control component. Then, by cooperating between the exhaust valve and the intake valve, the amount of gas in the control component is adjusted, so that the guide rod can reciprocate in the control component, thereby compressing the gas in the control component and causing it to be ejected from the jet seat, completing the axial demolding of the injection molded part from the mold. By demolding in a circumferential-first and then axial manner, the adhesion between the injection molded part and the mold can be reduced, thereby avoiding damage to the injection molded part. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of a special mold for precision parts according to the present invention;

[0041] Figure 2 This is a schematic diagram of the mold of the present invention;

[0042] Figure 3 This is a schematic diagram of the air blowing unit structure of the present invention;

[0043] Figure 4 This is a schematic diagram of the demolding component structure of the present invention;

[0044] Figure 5 This is a structural diagram of the demolding component of the present invention;

[0045] Figure 6 This is a cross-sectional view of the demolding component of the present invention;

[0046] Figure 7 This is a schematic diagram of the first groove structure of the present invention;

[0047] Figure 8 This is a schematic diagram of the guide rod structure of the present invention;

[0048] Figure 9 This is a schematic diagram of the adjustment component structure of the present invention;

[0049] Figure 10 This is a schematic diagram of the propulsion tube structure of the present invention;

[0050] Figure 11 This is a schematic diagram of the first chamber structure of the present invention.

[0051] Reference numerals: 1. Mold; 2. Sprue seat; 3. Guide seat; 4. Pressing part; 5. Mold base; 6. Air blowing unit; 61. Demolding assembly; 611. Vent seat; 612. Return spring; 613. Guide rod; 614. First groove; 615. Second groove; 616. Air inlet; 617. Drainage channel; 618. Sealing rod; 619. Sealing spring; 620. Air jet pipe; 621. Air jet seat; 62. Exhaust pipe; 63. Adjustment assembly; 631. Push tube; 632. Push spring; 633. Plug; 634. Support spring; 635. Inner tube; 636. First chamber; 637. Air jet channel; 638. Second chamber; 639. Air hole; 64. Control assembly; 641. Drive handle; 642. Adjusting gear; 643. Guide tube; 65. Mounting seat; 7. Air pipe. Detailed Implementation

[0052] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0053] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0054] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0055] This invention discloses a special mold for precision parts and an injection molding method, referring to... Figures 1-11 A special mold for precision parts includes:

[0056] The mold body 1 includes an upper mold and a lower mold, a sprue seat 2 disposed on the mold body 1, a guide seat 3 connected to the sprue seat 2, two pressure members 4 symmetrically disposed in the mold body 1, a mold base 5 located inside the mold body 1 and communicating with the guide seat 3, multiple air pipes 7 disposed in the mold body 1, and an air blowing unit 6 communicating with the air pipes 7; the air blowing unit 6 is located inside the mold base 5 and is used to cool and demold the injection molded parts in the mold base 5.

[0057] The air blowing unit 6 includes two mounting bases 65 disposed at the bottom of the mold base 5, an exhaust pipe 62 connecting the two mounting bases 65, a demolding component 61 and a control component 64 disposed on one of the mounting bases 65, and an adjustment component 63 disposed on the other mounting base 65. The control component 64 is used to adjust the position of the demolding component 61, thereby changing the impact force of the airflow during demolding, and can complete the demolding work for different injection molded parts. The exhaust pipe 62 has multiple air outlets in the circumferential direction. The adjustment component 63 is connected to multiple air pipes 7. By adjusting the movement of the adjustment component 63, the flow direction of the airflow is changed, so that the airflow can contact the bottom and inner wall of the injection molded part and generate an impact force to complete the demolding work of the injection molded part. Through the operation of the adjustment component 63, the gas can be directed from... The exhaust pipe 62 discharges air through its circumferential outlet, allowing the injection molded part to detach radially from the mold base 5. Then, by adjusting the cylinder, the operating mode of the adjusting component 63 is changed, causing the push pipe 631 to abut against the plunger 633 and push the plunger 633 to move a predetermined distance, allowing gas to enter the control component 64. Then, through the cooperation between the exhaust valve and the intake valve, the amount of gas in the control component 64 is adjusted, allowing the guide rod 613 to reciprocate in the control component 64, thereby compressing the gas in the control component 64 and allowing it to be ejected from the jet seat 621, completing the axial demolding of the injection molded part from the mold 1. By demolding in a circumferential and then axial manner, the above method can reduce the adhesion between the injection molded part and the mold 1, thereby avoiding damage to the injection molded part.

[0058] The control component 64 includes a drive handle 641 disposed on and slidably connected to the mounting base 65, the drive handle 641 having a plurality of teeth, an adjusting gear 642 meshing with the teeth, and a guide tube 643 connected to the adjusting gear 642; the guide tube 643 is sleeved on the demolding component 61, and by rotating the guide tube 643, its position relative to the demolding component 61 is adjusted, thereby changing the impact force of the airflow and completing the demolding of the injection molded part;

[0059] When adjusting the airflow impact force, the drive handle 641 drives the adjusting gear 642 to rotate, which in turn drives the guide tube 643 to rotate, adjusting the connection position between the second groove 615 and the drainage channel 617. When the guide rod 613 moves beyond the preset area, the first groove 614 and the second groove 615 connect the first space with the drainage channel 617, instantly reducing the pressure in the first space and allowing the sealing rod 618 to reset. By reducing the displacement of the guide rod 613, the gas pressure in the first space is changed, thereby adjusting the axial demolding airflow speed.

[0060] By adjusting the gas flow rate for axial demolding, problems such as axial deformation and surface scratches of injection molded parts due to excessive airflow or high demolding resistance and workpiece jamming due to insufficient airflow can be avoided, thus ensuring stable axial demolding action.

[0061] In this device, when the guide rod 613 moves beyond the predetermined area, the first groove 614 and the second groove 615 automatically connect the first space with the drainage channel 617, instantly relieving pressure in the first space, causing the sealing rod 618 to reset and reducing the displacement of the guide rod 613. This prevents excessive pressure in the first space from causing excessive compression and wear on components such as the guide rod 613 and the return spring 612. At the same time, it avoids impact damage to the axial end face of the injection molded part by high-pressure airflow, extending the equipment life and reducing the scrap rate. This device can flexibly adapt to the demolding airflow requirements of injection molded parts with different axial dimensions and structures by adjusting the sliding stroke of the drive handle 641. Moreover, the maintenance cost of mechanical components is lower than that of the electrical control system, improving the versatility and practicality of the equipment.

[0062] The demolding assembly 61 includes a vent seat 611 that abuts against the mounting base 65, a guide rod 613 connected to the vent seat 611, a return spring 612 for connecting the vent seat 611 and the guide tube 643, and a first groove 614 respectively disposed at one end of the guide rod 613 along the axial direction of the guide rod 613, and a second groove 615 communicating with the first groove 614 and disposed in the circumferential direction of the guide rod 613; the guide tube 643 is sleeved on the guide rod 613, and by rotating the guide tube 643, the overlap area between the second groove 615 and the guide tube 643 is changed, thereby changing the impact force of the airflow; the vent seat 611 is provided with at least two vent holes.

[0063] During the secondary demolding, another stream of gas enters the mounting base 65 through the air inlet 616 and flows into the first space formed by the first groove 614 and the second groove 615 along the drainage channel 617; the adjusting component 63 injects axial gas to push the plunger 633 to move in the guide tube 643, squeezing the gas in the first space to open the sealing rod 618, thereby realizing the axial secondary demolding of the injection molded part.

[0064] Since the drainage channel 617 is located inside the guide tube 643, when the guide tube 643 is rotated, the connection position between one end of the drainage channel 617 and the second groove 615 changes. When the connection position is close to the sealing rod 618, the pressure of the compressed gas in the first space decreases, and vice versa. Therefore, by changing the connection position, the impact force of the gas is adjusted so that the gas can complete the demolding of the injection molded part, while also avoiding damage to the injection molded part caused by excessive gas impact force.

[0065] The mounting base 65 has an air inlet 616, a flow channel 617 on the guide tube 643, a jet seat 621 screwed to the mounting base 65, a sealing rod 618 disposed in the jet seat 621, a jet pipe 620 connected to the jet seat 621, and a sealing spring 619 for connecting the jet pipe 620 and the sealing rod 618; one end of the sealing rod 618 is mushroom-shaped and has a pre-set sealing gasket; the jet pipe 620 has a jet channel for connecting the jet port on the jet seat 621 and the area between the jet pipe 620 and the jet seat 621; one end of the flow channel 617 has a pre-set gap with the air inlet 616, and the other end of the flow channel 617 guides... The gas is connected to the inside of the pipe 643; finally, the gas ejected from the sealing rod 618 can be ejected from the air jet seat 621 through the air jet pipe 620 and contact the bottom of the injection molded part, so that the injection molded part can be separated from the mold 1, and the injection molded part can be demolded for a second time, thus completing the injection molding production work of the injection molded part; through the cooperation between the sealing rod 618 and the sealing spring 619, the sealing rod 618 can be set in the air jet seat 621 at a predetermined pressure, that is, only when the gas pressure in the first space reaches the preset pressure value, the gas will break through the preset pressure value of the sealing spring 619, thereby causing the sealing rod 618 to move, and the gas can be ejected from the air jet seat 621 through the air jet pipe 620, thus completing the demolding work of the injection molded part.

[0066] There is a first space between the end of the guide rod 613 near the sealing rod 618 and the inner wall of the sealing rod 618 and the guide tube 643. The first space is used for gas storage. The gas in the first space is compressed by the movement of the sealing rod 618, so that the gas can impact the sealing rod 618, change the deformation of the sealing spring 619, and make the gas spray out from the jet seat 621, thereby completing the demolding of the injection molded part.

[0067] The adjustment assembly 63 includes a push tube 631 built into the mounting base 65, a push spring 632 connecting the push tube 631 and the mounting base 65, multiple air holes 639 formed in the circumferential direction of the push tube 631, and multiple sealing rings disposed between the push tube 631 and the mounting base 65; the mold 1 is provided with an adjustment cylinder, the output end of which is connected to the push tube 631; the push tube 631 has a U-shaped structure, and by adjusting the movement of the cylinder, the push tube 631 can be moved forward, thereby changing the flow direction of the airflow; the adjustment assembly 63 also includes an inner tube 635 disposed in the mounting base 65, a support spring 634 connected to the inner tube 635, and a connection between the support spring 634 and the mounting base 65. The system includes a stopper 633 and a sealing ring between the stopper 633 and the mounting base 65; by controlling the movement of the stopper 633, gas can enter the control assembly 64, enabling the control assembly 64 to perform intermittent inflation; the mounting base 65 also includes an annular first chamber 636 and a second chamber 638 between the mounting base 65 and the inner tube 635, with multiple air passages 637 on the mounting base 65 for connecting the first chamber 636 and the second chamber 638; by moving the propulsion tube 631, the stopper 633 is pushed to move, thereby connecting the air hole 639 on the propulsion tube 631 with the first chamber 636, allowing airflow to enter the second chamber 638, thus achieving axial airflow injection.

[0068] When injection molding is required, the upper mold and the lower mold are in the closed state. The injection material is injected into the guide seat 3 through the sprue seat 2, and then enters the mold base 5 through the guide channel on the guide seat 3, thereby completing the molding of the injection mold.

[0069] After the injection molded part is formed, the air supply adjustment cylinder drives the push tube 631 to move, and adjusts the position of the air pipe 7 in the axial direction of the mounting base 65 so that the air hole 639 is aligned with the area of ​​the exhaust pipe 62. After the air pump supplies air, one of the gas enters the exhaust pipe 62 through the adjustment component 63, and then exits from its air outlet to impact the inner wall of the injection molded part, causing it to detach from the mold 1 and complete the initial demolding.

[0070] After the initial demolding of mold 1 is completed, the regulating cylinder starts to move again, so that one end of the push tube 631 can push the plunger 633 to move. At this time, the plunger 633 can move in the mounting base 65, so that the first chamber 636 is connected to the air hole 639. At this time, the gas can directly enter the first chamber 636 through the push tube 631 and the air hole 639. Then the gas moves through the first chamber 636 to the second chamber 638. This part of the gas is the power source of the control component 64, which is used to drive the control component 64 to move.

[0071] The adjusting component 63 can drive the propulsion tube 631 to move via the adjusting cylinder, aligning its air hole 639 with the area of ​​the exhaust pipe 62. At this time, the gas can directly enter the exhaust pipe 62 through the air hole 639 of the propulsion tube 631, impacting the inner wall of the injection molded part from the air outlet, independently completing the initial demolding. After the initial demolding, the adjusting cylinder actuates again, pushing the propulsion tube 631 to move the plunger 633 within the mounting base 65, connecting the first chamber 636 with the air hole 639. The gas enters the first chamber 636 through the propulsion tube 631 and the air hole 639, and then flows into the second chamber 638, providing power to the control component 64 to drive its movement. The gas usage can be switched by moving the propulsion tube 631, without the need for additional gas valve control, providing a rapid response and adapting to the multi-stage requirements from initial demolding to subsequent precise demolding.

[0072] The mold 1 is also provided with multiple channels, which allow gas to come into contact with the injection molded part. The channels are also provided with sealing pillars. During the injection molding stage, the sealing pillars can perform a sealing function to prevent bulges from appearing on the surface of the injection molded part. During the blow molding and demolding stage, they can move away from the channels to complete the demolding process.

[0073] Working principle description: When injection molding is required, the upper and lower molds are in the closed state. The injection molding material is injected into the guide seat 3 through the sprue seat 2 using the injection equipment. Then, it flows into the mold base 5 through the guide pipe on the guide seat 3, thus completing the molding of the injection molded part. After the injection molded part is formed, before air supply, the adjusting cylinder starts working. The moving adjusting cylinder drives the push tube 631 to move, and the moving push tube 631 adjusts the position of the air pipe 7 along the axis of the mounting base 65, so that the air hole 639 is located in the area of ​​the exhaust pipe 62. At this time, the air pump supplies air to the air pipe 7, and the gas can be pre-entered into the adjusting component 63. The gas can be discharged from the air hole 639 on the push tube 631 into the area where the exhaust pipe 62 is located, and then discharged from the air outlet on the exhaust pipe 62, thereby impacting the inner wall of the injection molded part, so that the injection molded part can be separated from the mold 1, thus completing the initial demolding work of the mold 1; after the initial demolding work of the mold 1 is completed, the regulating cylinder starts to move again, so that one end of the push tube 631 can push the plunger 633 to move. At this time, the plunger 633 can move within the mounting base 65, so that the first chamber 636 is connected to the air hole 639. At this time, the gas can directly enter the first chamber 636 through the push tube 631 and the air hole 639, and then the gas moves through the first chamber 636 to the second chamber. In section 638, this portion of gas serves as the power source for the control component 64, driving its movement. When gas is needed to impact the bottom of the injection molded part for secondary demolding of the mold 1, another stream of gas enters the mounting base 65 through the air inlet 616. The gas then flows through the drainage channel 617 into the second groove 615 and the first groove 614, placing the gas within the first space. With the axial injection of gas into the adjusting component 63, the plunger 633 moves within the guide tube 643, compressing the gas in the first space and causing it to push open the sealing rod 618, thus completing the axial demolding of the injection molded part. When the impact force of the airflow needs to be controlled, the drive handle... The drive handle 641 moves, which drives the adjusting gear 642 to rotate. The adjusting gear 642 then drives the guide tube 643 to move. The rotating guide tube 643 adjusts the connection position between the second groove 615 and the drainage channel 617. Therefore, when the guide rod 613 moves beyond the predetermined area, the first groove 614 and the second groove 615 can connect the first space with the drainage channel 617, thereby instantly reducing the pressure in the first space. This allows the sealing rod 618 to return to its initial state. Furthermore, by reducing the displacement of the guide rod 613, the pressure of the gas in the first space is changed, thereby adjusting the airflow speed of the gas for final axial demolding.Finally, the gas ejected from the sealing rod 618 can be ejected from the jet nozzle 620 and then from the jet seat 621, contacting the bottom of the injection molded part. This allows the injection molded part to detach from the mold 1, enabling a secondary demolding process and completing the injection molding production.

[0074] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A special mold for precision parts, characterized in that, include: The mold (1) body includes an upper mold and a lower mold, a sprue seat (2) disposed on the mold (1) body, a flow guide seat (3) connected to the sprue seat (2), two pressure members (4) symmetrically disposed in the mold (1), a mold base (5) located in the mold (1) and connected to the flow guide seat (3), a plurality of air pipes (7) disposed in the mold (1), and an air blowing unit (6) connected to the air pipes (7); The blowing unit (6) is located inside the mold base (5) and is used to cool and demold the injection molded parts in the mold base (5); The blowing unit (6) includes two mounting seats (65) disposed at the bottom of the mold base (5), an exhaust pipe (62) for connecting the two mounting seats (65), a demolding component (61) and a control component (64) disposed on one of the mounting seats (65), and an adjustment component (63) disposed on the other mounting seat (65). The control component (64) is used to adjust the position of the demolding component (61), thereby changing the impact force of the airflow during demolding, and can complete the demolding work for different injection molded parts; The exhaust pipe (62) is provided with multiple air outlets in the circumferential direction; The adjustment component (63) is connected to multiple air pipes (7). By adjusting the movement of the adjustment component (63), the flow direction of the airflow is changed, so that the airflow can contact the bottom and inner wall of the injection molded part and generate impact force to complete the demolding of the injection molded part. The control component (64) includes a drive handle (641) disposed on the mounting base (65) and slidably connected to the mounting base (65), the drive handle (641) having a plurality of teeth, an adjusting gear (642) meshing with the teeth, and a guide tube (643) connected to the adjusting gear (642). The guide tube (643) is sleeved on the demolding assembly (61). By rotating the guide tube (643), the position between it and the demolding assembly (61) is adjusted, thereby changing the impact force of the airflow and completing the demolding of the injection molded part. The adjustment assembly (63) includes a push tube (631) built into the mounting base (65), a push spring (632) for connecting the push tube (631) and the mounting base (65), a plurality of air holes (639) opened in the circumferential direction of the push tube (631), and a plurality of sealing rings disposed between the push tube (631) and the mounting base (65); The mold (1) is equipped with an adjusting cylinder, and the output end of the adjusting cylinder is connected to the push tube (631); The propulsion tube (631) has a U-shaped structure. By adjusting the movement of the cylinder, the propulsion tube (631) can be moved forward, thereby changing the direction of airflow.

2. The precision component mold according to claim 1, characterized in that: The demolding assembly (61) includes a vent seat (611) that abuts against the mounting base (65), a guide rod (613) connected to the vent seat (611), a return spring (612) for connecting the vent seat (611) and the guide tube (643), a first groove (614) respectively disposed at one end of the guide rod (613) along the axial direction of the guide rod (613), and a second groove (615) communicating with the first groove (614) and disposed in the circumferential direction of the guide rod (613). The guide tube (643) is sleeved on the guide rod (613). By rotating the guide tube (643), the overlapping area between the second groove (615) and the guide tube (643) is changed, thereby changing the impact force of the airflow. The vent seat (611) is provided with at least two vent holes.

3. A precision component mold according to claim 2, characterized in that: The mounting base (65) is provided with an air inlet (616), a flow channel (617) on the guide tube (643), a jet seat (621) screwed to the mounting base (65), a sealing rod (618) provided in the jet seat (621), a jet pipe (620) connected to the jet seat (621), and a sealing spring (619) for connecting the jet pipe (620) and the sealing rod (618). One end of the sealing rod (618) is mushroom-shaped and has a pre-set sealing gasket; The jet pipe (620) is provided with a jet channel, which is used to connect the jet port on the jet seat (621) and the area between the jet pipe (620) and the jet seat (621); A gap is pre-set between one end of the drainage channel (617) and the air inlet (616), and the other end of the drainage channel (617) is connected to the inside of the guide tube (643).

4. A precision component mold according to claim 3, characterized in that: There is a first space between the end of the guide rod (613) near the sealing rod (618) and the inner wall of the sealing rod (618) and the guide tube (643). The first space is used for gas storage. The gas in the first space is compressed by the movement of the sealing rod (618), so that the gas can impact the sealing rod (618), change the deformation of the sealing spring (619), and make the gas spray out from the jet seat (621) to complete the demolding of the injection molded part.

5. A precision component mold according to claim 4, characterized in that: The adjustment assembly (63) further includes an inner tube (635) disposed in the mounting base (65), a support spring (634) connected to the inner tube (635), a plug (633) connected to the support spring (634) and abutting against the mounting base (65), and a sealing ring disposed between the plug (633) and the mounting base (65). By controlling the movement of the plunger (633), gas can be introduced into the control assembly (64), enabling the control assembly (64) to perform intermittent inflation.

6. A precision component mold according to claim 5, characterized in that: The mounting base (65) is also provided with an annular first chamber (636) and a second chamber (638) disposed between the mounting base (65) and the inner tube (635), and a plurality of jet passages (637) are opened on the mounting base (65) to connect the first chamber (636) and the second chamber (638). By moving the propulsion tube (631), the plunger (633) is pushed to move, thereby connecting the air hole (639) on the propulsion tube (631) with the first chamber (636), so that the airflow can enter the second chamber (638) to achieve the axial airflow injection operation.

7. An injection molding method applied to the precision component mold as described in claim 6, characterized in that, Includes the following steps: S1: When it is necessary to perform injection molding on the injection molded part, the upper mold and the lower mold are in the closed state. The injection material is injected into the guide seat (3) through the sprue seat (2), and then enters the mold base (5) through the guide pipe on the guide seat (3) to complete the molding of the injection molded part. S2: After the injection molded part is formed, the air supply adjustment cylinder drives the push tube (631) to move and adjust the position of the air pipe (7) in the axial direction of the mounting seat (65) so that the air hole (639) is aligned with the exhaust pipe (62) area; after the air pump supplies air, one of the gases enters the exhaust pipe (62) through the adjustment component (63) and then exits from its air outlet to impact the inner wall of the injection molded part, causing it to detach from the mold (1) and complete the initial demolding; S3: After initial demolding, the regulating cylinder is activated again, pushing the push tube (631) to drive the plunger (633) to move within the mounting base (65), so that the first chamber (636) is connected to the air hole (639); the gas enters the first chamber (636) through the push tube (631) and the air hole (639), and then flows into the second chamber (638), providing power to the control component (64) to drive its movement; S4: During the secondary demolding, another stream of gas enters the mounting base (65) through the air inlet (616) and flows into the first space formed by the first groove (614) and the second groove (615) along the drainage channel (617); the adjusting component (63) injects axial gas to push the plunger (633) to move in the guide tube (643), squeezing the gas in the first space to open the sealing rod (618) and realize the axial secondary demolding of the injection molded part; S5: When adjusting the airflow impact force, the drive handle (641) drives the adjustment gear (642) to rotate, which in turn drives the guide tube (643) to rotate, adjusting the connection position between the second groove (615) and the drainage channel (617); when the guide rod (613) moves beyond the preset area, the first groove (614) and the second groove (615) connect the first space with the drainage channel (617), instantly reducing the pressure of the first space and allowing the sealing rod (618) to reset; by reducing the displacement of the guide rod (613), the gas pressure of the first space is changed, thereby realizing the adjustment of the axial demolding airflow speed; S6: Finally, the gas ejected from the sealing rod (618) can be ejected from the jet seat (621) through the jet pipe (620) and contact the bottom of the injection molded part, so that the injection molded part can be separated from the mold (1) and the injection molded part can be demolded for a second time to complete the injection molding production of the injection molded part.

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