Foam molding machine forming process method and foam molding machine

Abstract

The foam plastic machine forming process method comprises the following steps that mold closing is conducted, specifically, a mold closing mechanism drives a movable mold to move towards a fixed mold, the movable mold abuts against a fixed mold core, and a mold cavity is formed by the movable mold core and the fixed mold core; a mold locking mechanism is used for locking the movable mold; molding: filling plastic and a foaming agent in the cavity, and foaming the plastic and filling the cavity with the plastic; cooling: cooling the movable mold and the fixed mold by a cooling system; opening the mold, wherein the movable mold moves away from the fixed mold; and demolding, specifically, the demolding mechanism ejects the foam plastic part out of the mold cavity. The foam plastic machine is stable in quality and high in control precision.

Description

Technical Field

[0001] The present application relates to the technical field of foam molding machines, and in particular to a foam molding machine forming process method and a foam molding machine. Background Art

[0002] The foam molding machine is an injection molding device that uses thermoplastics, resins, polyurethanes and other materials to heat and melt, and then after injection molding, fills the hollow part with a foaming agent to expand the hollow part of the product into substantial foam. Its working principle is that while the injection molding machine is injecting and molding, the foaming agent is sprayed into the cavity of the injection molding machine. After the injection molding machine is molded, the foaming agent diffuses and decomposes under local high temperature conditions to produce bubbles, thereby expanding the plastic into a foam material.

[0003] At present, hydraulic control technology is one of the key technologies in foam molding machines. It is mainly used to control the opening and closing of molds, movement and other actions of foam molding machines. However, although the existing hydraulic control system can achieve relatively complex motion control, it also faces many problems. For example, the sealing performance of the hydraulic system is poor, and leakage is prone to occur, resulting in a high equipment failure rate; at the same time, since the viscosity of the hydraulic oil is greatly affected by temperature changes, it is difficult to ensure control accuracy, especially in high temperature environments. This problem is more prominent. These problems will not only seriously affect the working stability and product quality of the foam molding machine, but also reduce production efficiency and increase maintenance costs. Summary of the invention

[0004] In view of this, the present application provides a foam molding machine forming process method and a foam molding machine, which adopts a motor for power drive, has high control accuracy, low failure rate and stable quality.

[0005] In a first aspect, the present application provides a foam molding machine forming process method, comprising the following steps: Mold closing: the mold closing mechanism drives the movable mold to move toward the fixed mold, the movable mold and the fixed mold core abut against each other, and the movable mold core and the fixed mold core form a cavity; Mold locking: the mold locking mechanism locks the movable mold; Molding, the cavity is filled with plastic and a foaming agent, and the plastic foams and fills the cavity; Cooling: the cooling system cools the movable mold and the fixed mold; The mold is opened, and the movable mold moves away from the fixed mold; Demoulding: the demoulding mechanism ejects the foam plastic part from the mould cavity.

[0006] By adopting the technical solution of the present application, the locking mechanism locks the movable mold to ensure that the mold will not open due to the pressure of the plastic and the foaming agent during the molding process, which can reduce the probability that the pressure in the cavity during the molding process pushes the movable mold to move and causes a gap between the movable mold and the fixed mold, thereby improving the molding quality of the product. The cooling system cools the movable mold and the fixed mold to quickly solidify the foamed plastic. The movable mold and the fixed mold are cooled at a set cooling speed to avoid internal stress and deformation. The foam molding machine molding process method ensures that the shape, size and performance of the foamed plastic meet the design requirements by accurately controlling the steps of mold closing, mold locking, molding, cooling, mold opening and demoulding.

[0007] In some embodiments, the clamping force direction is parallel to the sliding direction of the movable mold, and in the molding state, the clamping force prevents the movable mold from moving away from the fixed mold.

[0008] By adopting the technical solution of the present application, during the molding process, even under a large injection pressure, the clamping mechanism can effectively maintain the closed state of the mold, preventing the foam plastic from being damaged due to the opening of the mold, thereby ensuring the tight closure of the mold and the precise molding of the foam plastic.

[0009] In some embodiments, in the mold-opening state, the mold-locking mechanism is disengaged from the movable mold, and in the mold-closing state, the mold-locking mechanism is connected to the movable mold.

[0010] By adopting the above technical solution, the clamping mechanism can flexibly switch between the mold opening and mold closing states, ensuring that a stable clamping force is provided when needed, and will not interfere with the movement of the movable mold when not needed, which helps to ensure the smooth opening of the mold and reduce the risk of mold damage and mold jamming of the foamed parts. In the mold closing state, the clamping mechanism is connected to the movable mold to provide the necessary clamping force to resist the pressure during the injection molding process, which helps to improve product quality, protect the mold from damage, and extend the service life of the mold.

[0011] In some embodiments, when the movable mold is in the locked position, the locking mechanism is connected to the movable mold.

[0012] In some embodiments, the locking position is located between the mold opening position and the mold closing position, or the locking position coincides with the mold closing position.

[0013] By adopting the above technical solution, the locking position refers to a specific position of the movable mold during the opening and closing process of the mold. When the movable mold reaches this position, the clamping mechanism will be connected to it to ensure the stability of the mold and the safety during the injection molding process. The locking position is an intermediate transition state. When the locking position is between the mold opening position and the mold closing position, the movable mold will first reach the locking position and connect with the clamping mechanism during the process of moving from the mold opening position to the mold closing position. This design allows the mold to be adjusted or checked as necessary before the mold closing to ensure the accuracy and safety of the mold. When the locking position coincides with the mold closing position, the locking position is actually the mold closing position. The movable mold will also be connected to the clamping mechanism when it reaches the mold closing position. This design simplifies the operation process because the movable mold does not need to make additional movements between two different positions. This overlapping design is usually used in scenarios where the injection molding process needs to be completed quickly and efficiently. Since the clamping mechanism starts to work immediately at the mold closing position, it can better resist the pressure during the injection molding process and protect the mold from damage.

[0014] In some embodiments, in the locking position, after the movable mold and the fixed mold are connected, the mold clamping mechanism and the mold locking mechanism synchronously drive the movable mold to move closer to the fixed mold.

[0015] By adopting the above technical solution, in the locking position, when the movable mold and the fixed mold are connected, the mold clamping mechanism and the mold locking mechanism start to synchronously drive the movable mold to move closer to the fixed mold. This synchronous drive ensures the stability and accuracy of the mold during the mold closing process. By accurately controlling the action sequence and driving force of the mold clamping mechanism and the mold locking mechanism, the mold can be closed quickly and smoothly, and the risk of mold wear and damage can be reduced.

[0016] In some embodiments, at the mold locking position, the mold clamping mechanism stops working, and the mold locking mechanism locks the movable mold through a self-locking structure.

[0017] By adopting the above technical solution, the clamping position refers to the position where the movable mold and the fixed mold are in full contact and tightly matched during the opening and closing process of the mold. At this position, the clamping mechanism will lock the movable mold to ensure the stability and safety of the mold during the injection molding process. In the clamping position, the movable mold and the fixed mold are in close contact, the clamping mechanism stops working, and no longer applies thrust to the movable mold. At this time, if the clamping mechanism continues to work, it may cause unnecessary wear or damage to the mold. The clamping mechanism locks the movable mold through a self-locking structure. During the clamping process, when the movable mold and the fixed mold are in full contact, the self-locking structure of the clamping mechanism will automatically trigger to lock the movable mold on the fixed mold. This locking method is not only stable and reliable, but also can withstand the huge pressure generated during the injection molding process.

[0018] In some embodiments, an adjustment step is further included before mold closing, wherein the adjustment step is used to adjust the depth of the accommodating cavity of the fixed mold.

[0019] By adopting the above technical solution, the main purpose of adjusting the depth of the fixed mold cavity is to meet the production requirements of different products. Different products may require different thicknesses or depths. Therefore, by adjusting the cavity depth of the mold, products that meet the design requirements can be flexibly produced. The design of adjusting the depth of the fixed mold cavity before mold closing is suitable for a variety of injection molding scenarios. It can not only improve the flexibility and adaptability of the mold, but also meet the production requirements of different products.

[0020] In a second aspect, the present application provides a foam molding machine, which adopts the foam molding machine molding process method described in the first aspect.

[0021] In some embodiments, the foam molding machine includes a frame, a movable mold, a fixed mold and a demolding baffle, the frame is provided with a guide rail, the movable mold is slidably connected to the guide rail, the movable mold and the demolding baffle are located on both sides of the fixed mold, and the demolding baffle limits the relative distance between the demolding baffle and the fixed mold through a locking structure.

[0022] By adopting the above technical scheme, the foam molding machine adopts the foam molding machine molding process method of the first aspect. During the mold closing process, the movable mold will move along the guide rail to the fixed mold until the two are closely matched. Then, the injection molding machine will inject the molten foam material into the mold cavity of the mold. After the injection molding is completed, the movable mold will retreat along the guide rail, and the demoulding baffle will assist in the separation of the foam product. Finally, the foam product will be pushed out of the mold to complete the entire molding process. This foam molding machine design combines advanced molding process methods and structural designs, and has the advantages of high efficiency, precision, easy operation and maintenance. It is suitable for the production of a variety of foam products and can meet the production needs of different customers.

[0023] In summary, the present application has at least one of the following beneficial technical effects: 1. Compared with the traditional driving method, the foam molding machine molding process method of the present application effectively solves the problems existing in the foam molding machine in terms of stability and control accuracy, improves the production efficiency of the equipment, reduces maintenance costs, and enhances the adaptability and environmental protection performance of the equipment.

[0024] 2. Improved connection stability and equipment security, simplified operation procedures, enhanced adaptability, and reduced failure rate.

[0025] 3. It improves the clamping efficiency and stability, has high adaptability, and can be widely used in molds of different sizes and shapes.

[0026] 4. Ensure that the shape, size and performance of the foam plastic parts meet the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural schematic diagram of the foam molding machine of the present application; Figure 2 yes Figure 1 Enlarged schematic diagram of area A in the middle; Figure 3 This is a schematic diagram of the structure of the foam molding machine of the present application when viewed from above; Figure 4 It is a structural schematic diagram of the foam molding machine of the present application from the rear view; Figure 5 yes Figure 4 Enlarged schematic diagram of area B in the middle; Figure 6 It is a schematic diagram of the forming process flow of the foam molding machine of this application.

[0028] Description of reference numerals: 1. Frame; 11. Guide rail; 2. Control mechanism; 3. Moving mold; 31. Electric drive component; 32. Rack; 33. Gear; 4. Fixed mold; 5. Locking motor; 51. Worm gear mechanism; 52. Locking rod; 521. Groove; 6. Demolding baffle; 61. Demolding rod; 611. Positioning hole; 62. Connecting rod; 621. Locking hole; 63. Locking piece; 7. Locking mechanism; 71. Locking cylinder; 72. Locking piece; 721. Slot; 722. Round hole. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various configurations. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0033] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0034] Example 1 See also Figure 1-Figure 5 The foam molding machine provided by the embodiment of the present application comprises a control mechanism 2, a frame 1, a movable mold 3, a fixed mold 4 and a guide rail 11, wherein the guide rail 11 is fixedly connected to the frame 1, the fixed mold 4 is fixedly connected to the frame 1, the movable mold 3 is slidably connected to the guide rail 11, and a rear mold and a front mold are respectively fixed in the movable mold 3 and the fixed mold 4, and the rear mold and the front mold are buckled to form an injection cavity. The movable mold 3 is connected to an electric drive 31, and the electric drive 31 drives the movable mold 3 to slide along the guide rail 11 through a transmission mechanism. The movable mold 3 has an open mold state and a closed mold state under the drive of the electric drive 31. In the closed mold state, the movable mold 3 and the fixed mold 4 are locked, and the front mold and the rear mold form a closed cavity for foam molding. In the open mold state, the movable mold 3 and the fixed mold 4 are separated, and the foam is out of the mold. The foam molding machine of this embodiment improves the control accuracy and reduces the failure rate.

[0035] See also Figure 1 The fixed mold 4 is connected with a demoulding baffle 6, which is slidably connected to the frame 1. The demoulding baffle 6 is used to trigger the demoulding mechanism after the product is formed to ensure the convenience and integrity of the foam plastic part. The demoulding baffle 6 can be made of stainless steel or aluminum alloy, which is both light and corrosion-resistant.

[0036] Specifically, the fixed mold 4 is connected with a demoulding rod 61, and the demoulding baffle 6 is slidably connected to the demoulding rod 61. The relative distance between the demoulding baffle 6 and the fixed mold 4 is limited by a locking structure between the demoulding baffle 6 and the demoulding rod 61. The demoulding rod 61 connects the fixed mold 4 and the movable mold 3, and the demoulding rod 61 is fixedly connected to the fixed mold 4. The movable mold 3 is slidably connected to the demoulding rod 61, and the length direction of the demoulding rod 61 is parallel to the sliding direction of the guide rail 11. Such a design can ensure the stability of the sliding of the movable mold 3 and avoid product quality problems caused by position deviation. The demoulding rod 61 can be made of high-strength alloy steel, and the surface is chrome-plated to increase wear resistance and corrosion resistance.

[0037] The fixed mold 4 is also slidably connected to the clamping rod 52, and the clamping motor 5 fixed to the fixed mold 4 drives the clamping rod 52 to slide along the sliding direction of the movable mold 3. The function of the clamping rod 52 is to keep the movable mold 3 and the fixed mold 4 in close contact in the mold closing state to prevent material leakage. The clamping motor 5 can also select an AC servo motor or a stepper motor to ensure the accuracy and reliability of the clamping action. The clamping motor 5 is fixed to the fixed mold 4. The material of the clamping rod 52 can be carbon steel or cast iron, and the surface is polished to reduce friction resistance.

[0038] An annular expansion seal ring is set on the parting surface of the fixed mold 4. The seal ring has a double-layer silicone structure and an internal honeycomb support. When the cavity pressure exceeds 2MPa, the seal ring can expand radially by 0.3-0.8mm to dynamically compensate for the micro-deformation of the mold caused by foaming expansion and prevent overflow. In conjunction with the negative pressure adsorption device of the ejection mechanism, a negative pressure adsorption force of -0.05MPa is generated during demoulding to prevent deformation of thin-walled parts.

[0039] The mold locking motor 5 is connected to the mold locking rod 52 through a worm gear mechanism 51. The worm gear mechanism 51 is characterized by strong self-locking property, which can maintain the locked state in the case of power failure and has high safety. In addition, the worm gear mechanism 51 can also achieve a large speed reduction ratio, which is suitable for large load occasions. The worm wheel can be made of copper, and the worm can be made of hardened steel. The two are well matched and run stably.

[0040] An alternative technical solution is to use a mechanical-hydraulic hybrid clamping structure and set a double locking mechanism at the locking position. When the movable mold moves to the locking position, the hydraulic cylinder first applies an axial preload (50-80% of the rated clamping force), and then the chuck mechanism is rotated to perform radial mechanical locking. When unlocking, the timing of hydraulic pressure relief and mechanical unlocking is coordinated by rotating 5° in the opposite direction to avoid sudden stress release.

[0041] See also Figure 2 The locking structure includes a locking member 63, a plurality of positioning holes 611 provided on the demoulding rod 61 along the length direction, and a locking hole 621 provided on the demoulding baffle 6 that can correspond to the positioning hole 611 one by one. The locking member 63 passes through the positioning hole 611 and the locking hole 621 to limit the sliding of the demoulding baffle 6. The advantage of this design is that the position of the demoulding baffle 6 can be adjusted according to the size of different products, and a variety of production requirements can be flexibly met. The locking member 63 can be a bolt or a pin, and the number and spacing of the positioning holes 611 can be set according to actual needs.

[0042] See also Figure 1 and Figure 2 The connecting rod 62 and the guide rail 11 are sequentially connected to the frame 1 from top to bottom. The clamping rods 52 are set to 4 and distributed around the fixed mold 4. The worm gear mechanism 51 drives the four clamping rods 52 to move synchronously.

[0043] See also Figure 3 The transmission mechanism is a gear 33 and a rack 32 that mesh with each other. The gear 33 is fixedly connected to the output shaft of the electric drive 31, the electric drive 31 is fixedly connected to the movable mold 3, and the rack 32 is fixedly connected to the frame 1. This gear 33 rack 32 transmission method is simple and reliable, and can achieve precise position control. For example, the gear 33 can be a helical gear 33 or a spur gear 33, and the rack 32 can be made of high-strength steel to enhance durability. In addition, grease can be added between the gear 33 and the rack 32 to reduce friction and extend service life.

[0044] The electric drive member 31 is a motor, which is connected to a speed change mechanism, and the gear 33 is fixedly connected to the output shaft of the speed change mechanism. The motor here can be an AC servo motor or a stepper motor, both of which have high control accuracy and response speed and are suitable for precision control occasions. The speed change mechanism can be a planetary reducer or a worm gear reducer, both of which can effectively reduce the speed, increase the torque, and ensure the smooth movement of the movable mold 3.

[0045] See 4 and Figure 5 The mold locking rod 52 is provided with a groove 521, and the movable mold 3 is provided with a locking mechanism 7. When the mold locking rod 52 is connected to the movable mold 3, the locking mechanism 7 can connect and fix the movable mold 3 and the mold locking rod 52 through the groove 521. The locking mechanism 7 can be a snap-on type or a latch type, which is easy to operate, fast and reliable. The design of the groove 521 can be rectangular or polygonal, so as to better transmit the torque and ensure the locking strength.

[0046] Specifically, the locking mechanism 7 includes a locking cylinder 71 and a locking member 72. The locking member 72 is slidably connected to the movable mold 3. The piston rod of the locking cylinder 71 is connected to the locking member 72. The locking member 72 is provided with a communicating slot 721 and a circular hole 722. In the mold closing state, the fixed mold 4 and the movable mold 3 are in abutment with each other in a locking position. In this state, the locking rod 52 passes through the circular hole 722, and the groove 521 corresponds to the position of the slot 721. The locking cylinder 71 drives the locking member 72 to slide downward so that the slot 721 is engaged with the locking rod 52 at the position of the groove 521. The locking rod 52 can pull the movable mold 3 to move toward the fixed mold 4 through the locking member 72, thereby increasing the locking force and reducing the risk of separation between the movable mold 3 and the fixed mold 4 during the molding process of the foam molding machine.

[0047] The implementation principle of this embodiment is: Under the control of the control mechanism 2, when the mold is closed, the electric drive 31 drives the movable mold 3 to slide along the guide rail 11 toward the fixed mold 4. When entering the mold closing state, the movable mold 3 and the fixed mold 4 are fitted, the locking mechanism 7 is locked with the locking rod 52, and the locking motor 5 drives the locking rod 52 through the worm gear mechanism 51 to pull the movable mold 3 to increase the locking force between the movable mold 3 and the fixed mold 4. After the injection molding is completed, the locking mechanism 7 is separated from the locking rod 52, and the electric drive 31 drives the movable mold 3 to slide along the guide rail 11 away from the fixed mold 4. The demoulding mechanism in the mold in the fixed mold 4 touches the demoulding baffle 6 to push the foam plastic part out of the fixed mold 4. The entire foam molding machine adopts electric drive to replace the traditional hydraulic system, which solves the problems of leakage and low control accuracy in the hydraulic system. The combination of the motor and the speed change mechanism realizes precise speed and position control, and the gear 33 rack 32 transmission method further improves the transmission efficiency and stability. The design of the demoulding baffle 6 and the demoulding rod 61 makes it safer and more convenient to take and put the product, and the flexibility of the locking structure adapts to the production requirements of different products. The setting of the locking rod 52 and the locking mechanism 7 ensures the tightness and firmness of the mold closing process, and improves the reliability and production efficiency of the overall equipment.

[0048] The above embodiments are for explaining the differences between the present application and the existing equipment. The structures such as injection molding and cooling are the same as those of the existing equipment and will not be described in detail.

[0049] Example 2 Please refer to 1- Figure 6 The present application discloses a foam molding process method, the working process includes the following steps: S1, put the raw materials to be processed into the hopper and send them into the preheating chamber for preheating through the feeding mechanism.

[0050] S2, after preheating is completed, the raw material is pushed to the injection port of the injection molding machine, ready to start injection molding.

[0051] S3, start the electric drive member 31, and drive the movable mold 3 to move along the guide rail 11 toward the fixed mold 4 through the transmission mechanism to enter the mold closing state.

[0052] S4, after the movable mold 3 contacts the fixed mold 4, the mold locking motor 5 drives the mold locking rod 52 to firmly lock the movable mold 3 and the fixed mold 4 together to form a closed mold cavity. The force direction of the mold locking is parallel to the sliding direction of the movable mold. When the movable mold is in the locking position (in this embodiment, when the locking position coincides with the mold closing position), the mold locking mechanism is connected to the movable mold. At the mold locking position, the mold closing mechanism stops working, and the mold locking mechanism locks the movable mold through the self-locking structure.

[0053] In another embodiment, the locking position can be set to be between the mold opening position and the mold closing position. In this locking position, after the movable mold and the fixed mold are connected, the mold closing mechanism and the mold locking mechanism synchronously drive the movable mold to move closer to the fixed mold.

[0054] S5, the injection unit injects the molten plastic into the mold cavity, and the spray device evenly sprays the foaming agent into the injection area. In the molding state, the clamping force prevents the movable mold from moving away from the fixed mold.

[0055] S6, cooling molding, after the injection molding is completed and cooling, the clamping motor 5 rotates in the reverse direction to unlock the movable mold 3 and the fixed mold 4.

[0056] S7, the electric drive member 31 reverses, and drives the movable mold 3 away from the fixed mold 4 through the transmission mechanism, and enters the mold opening state. In the mold opening state, the mold locking mechanism is separated from the movable mold, and in the mold closing state, the mold locking mechanism is connected to the movable mold.

[0057] S8, the demoulding mechanism of the fixed mold 4 pushes the foam plastic part under the push of the demoulding baffle 6, and ejects the finished foam plastic part out of the mold.

[0058] S9, after the finished product is taken out, clean the residue inside the mold and prepare for the next cycle of operation.

[0059] In a specific application, an adjustment step is also included before mold closing, and the adjustment step is used to adjust the depth of the accommodating cavity of the fixed mold so as to adapt to the assembly of different core sizes in the fixed mold.

[0060] A further solution is that in step S5, the molding step also includes a cavity volume adjustment mechanism, which controls the volume change of the cavity between the movable mold and the fixed mold in real time through the hydraulic servo system to achieve gradient control of the foaming expansion rate. When the foaming agent reacts, the cavity can be expanded in sections (0.5-2mm) according to a preset program, so that the product forms a density gradient structure. The device is linked with the clamping mechanism to automatically compensate for the cavity displacement during the secondary mold closing and pressure holding stage to ensure stable clamping force.

[0061] A further solution is to introduce a distributed temperature sensor array in the cooling stage of step S6 to automatically adjust the coolant flow rate according to the real-time detected mold temperature difference (±1.5°C). Pulse width modulation technology is used to control the cooling line solenoid valve to achieve asymmetric cooling (the flow rate on the movable mold side is 15%-20% faster than that on the fixed mold side), effectively eliminating product warping. The cooling rate and the release of the clamping force form an interlocking logic, and the holding time is automatically extended when the temperature difference exceeds the threshold.

[0062] The basic principle, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes, modifications, substitutions and variants, which all fall within the scope of the present invention claimed.

Claims

1. A foam molding process, characterized in that: The steps include: Mold closing: the mold closing mechanism drives the movable mold to move toward the fixed mold, the movable mold and the fixed mold core abut against each other, and the movable mold core and the fixed mold core form a cavity; Mold locking: the mold locking mechanism locks the movable mold; Molding, the cavity is filled with plastic and a foaming agent, and the plastic foams and fills the cavity; Cooling: the cooling system cools the movable mold and the fixed mold at a set cooling speed; The mold is opened, and the movable mold moves away from the fixed mold; Demoulding: the demoulding mechanism ejects the foam plastic part from the mould cavity.

2. The foam molding process according to claim 1, characterized in that: The clamping force direction is parallel to the sliding direction of the movable mold. In the molding state, the clamping force prevents the movable mold from moving away from the fixed mold.

3. The foam molding process according to claim 1 or 2, characterized in that: In the mold-opening state, the mold-locking mechanism is separated from the movable mold, and in the mold-closing state, the mold-locking mechanism is connected to the movable mold.

4. The foam molding process according to claim 3, characterized in that: When the movable mold is in the locking position, the locking mechanism is connected to the movable mold.

5. The foam molding process according to claim 4, characterized in that: The locking position is located between the mold opening position and the mold closing position, or the locking position coincides with the mold closing position.

6. The foam molding process according to claim 5, characterized in that: When the locking position is located between the mold opening position and the mold closing position, at the locking position, after the movable mold and the fixed mold are connected, the mold closing mechanism and the mold locking mechanism synchronously drive the movable mold to move close to the fixed mold.

7. The foam molding process according to claim 6, characterized in that: At the mold locking position, the mold clamping mechanism stops working, and the mold locking mechanism locks the movable mold through a self-locking structure.

8. The foam molding process according to claim 1, characterized in that: The method also includes an adjustment step before mold closing, wherein the adjustment step is used to adjust the depth of the accommodating cavity of the fixed mold.

9. A foaming machine, characterized in that: The foam molding machine molding process method described in any one of claims 1 to 8 is used to process and mold foam parts.

10. The foam molding machine according to claim 9, characterized in that: The invention comprises a frame, a movable mold, a fixed mold and a demoulding baffle. The frame is provided with a guide rail. The movable mold is slidably connected to the guide rail. The movable mold and the demoulding baffle are located on both sides of the fixed mold. The demoulding baffle limits the relative distance between the demoulding baffle and the fixed mold through a locking structure.

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