Plastic mold system and ejector pin ejection integrated intelligent mold thereof

Abstract

The invention relates to a plastic mold system and an ejector pin ejection integrated intelligent mold thereof.The plastic mold system comprises a machine body, an injection molding mechanism and a power structure, and the injection molding mechanism and the power structure are arranged on the machine body; the injection molding mechanism comprises an injection molding unit and an injection molding top plate connected with the injection molding unit, an injection molding cavity and at least one return cavity are formed in the injection molding top plate, the injection molding cavity communicates with the return cavity, and a sliding piece is connected into the return cavity in a sealed and sliding mode; the power structure comprises a first air cylinder, a fixing block, two limiting strips, a sliding block and a power unit, the first air cylinder is used for driving the sliding block to move, the two limiting strips are symmetrically arranged on the two sides of the fixing block, cavities are formed in the two limiting strips, the cavities are covered with covering pieces, and the power unit is connected with the power unit. The covering piece is arranged on the limiting strip in a covering manner so as to seal the cavity; the problems that after existing injection molding equipment is separated from a mold, an injection molding opening is prone to overflowing, and follow-up mold forming is affected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding equipment, and in particular to a plastic mold system and an ejector-ejection integrated intelligent mold thereof. Background Art

[0002] Plastic mold system is also called injection molding, which is a molding method of injection and molding. The demoulding mechanism of injection molding equipment is one of the finishing procedures of injection molding production. The surface integrity of the finished product obtained by demoulding directly affects whether the finished product is qualified. Therefore, the demoulding mechanism of injection molding equipment needs to improve the control of the surface integrity of the finished product during the demoulding process. The injection molding equipment is used to inject high-temperature molten plastic into the mold. After the molten plastic is cooled in the mold, the mold is separated to obtain the desired finished product. At present, there are two main aspects that affect the quality of plastic parts: 1. When the injection molding equipment is injecting molds, it needs to apply high pressure to inject the molten plastic into the mold. After the injection is completed, the injection gate (plastic inlet) of the mold needs to be separated from the injection port of the injection molding equipment. At this time, the molten plastic in the injection port of the injection molding equipment is still under pressure, which will cause some molten plastic to flow out of the injection port and solidify. The next time the injection gate (plastic inlet) of the mold needs to be connected to the injection port of the injection molding equipment for extrusion, the subsequent molten plastic will not be able to be squeezed into the mold, and bubbles, gaps or even scrapped will appear in the injection molded parts.

[0003] 2. Since the mold needs to be closed and separated continuously and injection molded parts are produced in batches, the temperature inside the mold will rise rapidly after a period of time, resulting in a longer cooling time for the molten plastic after entering the mold, resulting in reduced production efficiency; moreover, it is difficult to demold the injection molded parts in the mold, affecting the production speed of the injection molded parts. Summary of the invention

[0004] One of the purposes of the present invention is to provide a plastic mold system to solve the problem that the injection port is prone to overflow after the existing injection molding equipment is separated from the mold, affecting subsequent mold molding; the second purpose is to propose an intelligent mold with integrated ejector pin ejection.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A plastic mold system comprises a body, an injection molding mechanism and a power structure arranged on the body; The injection molding mechanism comprises an injection molding unit and an injection molding top plate connected to the injection molding unit, wherein an injection molding cavity and at least one return cavity are provided in the injection molding top plate, the injection molding cavity is communicated with the return cavity, and a sliding sheet is sealed and slidably connected in the return cavity; The power structure includes a first cylinder, a fixed block, two limit bars, a slider and a power unit, wherein the first cylinder is used to drive the slider to move, the two limit bars are symmetrically arranged on both sides of the fixed block, and a cavity is arranged in each of the two limit bars, and a cover is provided on the cavity, and the cover is covered on the limit bar to seal the cavity; Both sides of the slider extend into the cavities of the two limit bars respectively and can slide in the cavities, and the slider divides the cavity into a first chamber and a second chamber; the first chamber is connected to the retraction chamber.

[0006] According to the above technical solution, both sides of the slider extend into the cavity of the limit strip, and the slider divides the cavity into a first chamber and a second chamber. When the mold is opened, the first cylinder drives the slider to move to the left. At this time, the volume of the first chamber increases, and the volume of the second chamber decreases. Since the first chamber is connected to the return chamber through the first air pipe, the air pressure inside the first chamber decreases and low pressure appears in the return chamber. Part of the molten plastic in the injection cavity enters the return chamber, thereby achieving the purpose of decompression and preventing the molten plastic from overflowing from the end of the injection cavity.

[0007] Furthermore, at least one air cavity is formed on the injection molding top plate, each of the air cavities is connected to one of the retraction cavities, and each of the air cavities is connected to a first air pipe; A first air hole communicating with the first chamber is formed on each of the limiting strips, and the first air hole is communicated with a free end of the first air pipe.

[0008] According to the above technical solution, a first air hole connected to the first chamber is opened on the limit strip, and the first air hole allows the gas in the first chamber to exchange with the outside (or other parts of the injection molding mechanism); the first air hole and the free end of the first air pipe are interconnected to form a complete gas flow path. When the first cylinder drives the slider to move, the volume of the first chamber changes, causing the internal air pressure to change. The air pressure change is transmitted to the air cavity and the return cavity through the first air hole and the first air pipe.

[0009] Furthermore, each of the limiting strips is provided with a second air hole communicating with the second chamber, the second air hole is connected with a second air pipe, and the free end of the second air pipe is used to be connected with the mold.

[0010] According to the above technical solution, during the injection stage, the power mechanism puts the mold in a mold-closing state, and the molten plastic is injected into the injection cavity under the action of the injection unit; at this time, since the volume of the first cavity does not change, the slide is located in the retraction cavity and remains stable, and the slide plays a role in blocking the molten plastic from entering the air cavity, and the injection cavity performs injection molding on the mold. When the mold is opened, the first cylinder drives the slider to move to the left, and the movement of the slider drives the volume of the second cavity of the two limit bars to decrease. Since the second air hole connected to the second cavity is connected to the second air pipe, due to the effect of air pressure, the gas in the second cavity enters the mold through the second air pipe, and blows the injection molded part, which is convenient for cooling and demolding the injection molded part.

[0011] Furthermore, the injection unit comprises a delivery pipe and a hopper connected to the delivery pipe, an electromagnetic coil is wound around the delivery pipe, and the interior of the delivery pipe is connected to the injection cavity; The injection molding unit also includes a motor, a conveying auger coaxially connected to the output shaft of the motor, and a second cylinder. The motor drives the conveying auger to rotate, and the conveying auger is coaxially connected to the conveying pipe. The second cylinder can push the motor and the conveying auger to move along the length direction of the machine body.

[0012] According to the above technical solution, the motor, the second cylinder and the electromagnetic coil are started, and the cylinder can push the motor and the conveying auger to move; the motor drives the conveying auger to rotate and starts to convey the plastic particles. At the same time, the electromagnetic coil heats and melts the plastic particles in the conveying pipe. During the movement, the plastic particles are affected by the heat generated by the electromagnetic coil and gradually heated and melted. The heated and melted plastic particles continue to move forward under the push of the conveying auger until they enter the injection molding cavity.

[0013] The addition of the second cylinder enables the injection unit to apply greater pressure during the injection molding process. When the second cylinder pushes the motor and the conveying auger forward, it not only increases the pushing force of the conveying auger on the plastic particles, but also converts this force into additional pressure on the molten plastic in the injection cavity through the transmission of the mechanical structure, which helps to improve the density and surface quality of the injection molded parts and reduce the internal voids and defects of the injection molded parts. By controlling the thrust and movement speed of the second cylinder, the pressure in the injection molding process can also be flexibly adjusted, making the injection molding process more refined and controllable, which helps to meet the special pressure requirements of different injection molded parts.

[0014] Further, the power unit comprises a pushing block, two first connecting rods, two second connecting rods and two third connecting rods, the two first connecting rods are respectively symmetrically hinged to the pushing block, the two second connecting rods are respectively hinged to the corresponding two first connecting rods, and the free ends of the two second connecting rods are respectively symmetrically hinged to the fixed block; Both sides of the slider are hinged to one end of the two third connecting rods respectively, and the other ends of the two third connecting rods are hinged to the two second connecting rods respectively; wherein the hinge point between the second connecting rod and the third connecting rod is located at two-thirds of the second connecting rod close to the first connecting rod.

[0015] According to the above technical solution, the first cylinder is installed on the fixed block, the piston end of the first cylinder is connected to the slider, the first cylinder is used to push the slider to move, the movement of the slider drives the angle of the third connecting rod to change, the third connecting rod drives the angle of the second connecting rod to change, and acts on the first connecting rod, the first connecting rod drives the push block to move, the push block is connected to the lower mold base of the mold, and is used to drive the mold to open or close the mold; Through the transmission of multi-stage connecting rods, the linear motion of the first cylinder can be converted into smooth movement of the push block, reducing the impact and vibration during the movement, thereby improving the stability and controllability of the mold opening or closing; this transmission method can better control the movement trajectory and speed of the push block, ensuring the accuracy and consistency of the mold during the opening or closing process.

[0016] Further, the covering member includes a telescopic plate and a slide plate arranged on the limiting strip, one side of the telescopic plate is connected to the fixed block, and the other end of the telescopic plate is connected to the slide block, the telescopic plate can be extended or shortened, and the telescopic plate is used to cover the second chamber; The slide plate is sealingly connected to the limiting strip to cover the first chamber, and the slider can drive the slide plate to move.

[0017] According to the above technical solution, the functions of the telescopic plate and the slide plate are to seal the first chamber and the second chamber to prevent internal air leakage; the movement of the slider can change the volume of the first chamber and the second chamber, the telescopic plate and the slide plate are respectively arranged on both sides of the slide plate, the telescopic plate can extend or shorten following the slide plate, and the telescopic plate is used to seal the second chamber.

[0018] On the other hand, the present invention also provides an integrated intelligent mold with ejector pins, comprising a mold body, the mold body comprising an upper mold base, a fixed mold plate, a movable mold plate and a lower mold base, and also comprising the aforementioned plastic mold system, the mold body being arranged between the injection molding ejector plate and the push block; The upper mold base is detachably connected to the injection molding top plate, and the lower mold base is detachably connected to the pushing block.

[0019] Furthermore, two groups of molding units are provided between the fixed mold plate and the movable mold plate, and the fixed mold plate, the movable mold plate and the gap between the two molding units together enclose a molding cavity, and the molding cavity is used to mold injection molded parts.

[0020] Furthermore, the molding unit comprises two cores, the two cores are symmetrically slidably arranged on the movable platen, and the two cores can be close to or away from each other; Each of the cores is provided with a through hole, and the upper die seat is fixedly provided with four inclined tie rods penetrating the fixed die plate, and the inclined tie rods are adapted to the through holes; When the mold is closed, the cores are close to each other; When the mold is opened, the cores are separated from each other.

[0021] According to the above technical scheme, the inclined tie rod is fixed on the upper mold base, and at the same time, the inclined tie rod is arranged corresponding to the through hole on the core. When the mold is closed, the cores are close to each other, and the gaps between the fixed mold plate, the movable mold plate and the four cores are jointly enclosed to form a molding cavity, and the molding cavity is used to mold the injection molded parts; when the mold is opened, the cores are away from each other, which is convenient for demolding the injection molded parts.

[0022] Furthermore, an air passage is provided in the upper die base, and the air passage is connected to the second air pipe; The inclined tie rod is provided with an air jet hole, and the air passage is connected with each of the air jet holes.

[0023] According to the above technical solution, when the mold is opened, the first cylinder drives the slider to move to the left, and the movement of the slider drives the volume of the second chamber of the two limit strips to become smaller. Since the second air hole connected to the second chamber is connected to the second air pipe, due to the effect of air pressure, the gas in the second chamber passes into the second air pipe, and the second air pipe supplies air to the airway. The gas in the airway is ejected from the jet hole through the airway inside the inclined rod; the injection molded part is blown to facilitate cooling and demolding of the injection molded part.

[0024] Beneficial effects of the present invention: 1. The present invention extends both sides of the slider into the cavity of the limit strip, and the movement of the slider ultimately drives the lower mold base to move, thereby overcoming the instability of the lower mold base being directly driven by the first cylinder, and improving the stability of the entire structure. The slider divides the cavity into a first chamber and a second chamber. When the mold is opened, the first cylinder drives the slider to move to the left, at which time the volume of the first chamber becomes larger and the volume of the second chamber becomes smaller. Since the first chamber is connected to the return chamber through the first air pipe, the air pressure inside the first chamber becomes smaller, and low pressure appears in the return chamber. Part of the molten plastic in the injection cavity enters the return chamber, thereby achieving the purpose of decompression and preventing the molten plastic from overflowing from the end of the injection cavity. At the same time, the second air hole connected to the second chamber is connected to the second air pipe. Due to the effect of air pressure, the gas in the second chamber flows into the second air pipe, and the second air pipe supplies air to the airway. The gas in the airway is ejected from the air jet hole through the airway inside the inclined tie rod; the formed injection molded part is blown to reduce the temperature of the injection molded part and the injection molded part can be separated from the mold. The injection jet hole is used to blow the injection molded part, which is convenient for cooling and demolding the injection molded part. At the same time, the dust dropped on the injection molded part when the mold is opened can be blown away, which speeds up the production speed and improves the overall quality of the injection molded part.

[0025] 2. By introducing an electromagnetic coil to heat and melt the plastic particles in the conveying pipe, combined with the coordinated work of the motor and the second cylinder, continuous and stable conveying and efficient injection molding of plastic particles are achieved. The addition of the second cylinder not only increases the pressure during the injection molding process, but also converts this part of the force into additional pressure on the molten plastic in the injection molding cavity through the transmission of the mechanical structure, which helps to improve the density and surface quality of the injection molded parts, reduce internal voids and defects, and thus improve product quality.

[0026] At the same time, the multi-stage connecting rod transmission power unit design converts the linear motion of the first cylinder into smooth movement of the push block, reducing the impact and vibration during the movement, improving the stability and controllability of the mold opening or closing, and further ensuring the accuracy and consistency of the injection molded parts.

[0027] Other advantages, objectives and features of the present application will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present application. The objectives and other advantages of the present application can be achieved and obtained through the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the plastic mold system and the integrated intelligent mold with ejector pins of the present invention; Figure 2 A half-section schematic diagram of a plastic mold system and an integrated intelligent mold with ejector pins according to the present invention; Figure 3 for Figure 2 Schematic diagram of part A; Figure 4 for Figure 2 Schematic diagram of part B; Figure 5 It is a partial cross-sectional schematic diagram of the plastic mold system and the integrated intelligent mold with ejector pins of the present invention; Figure 6 It is an exploded schematic diagram of the power structure in the plastic mold system of the present invention; Figure 7 It is a partial cross-sectional schematic diagram of the power structure in the plastic mold system of the present invention; Figure 8 It is a partial half-section schematic diagram of the power structure of the plastic mold system of the present invention when the mold is opened; Fig. 9 It is a partial half-section schematic diagram of the power structure of the plastic mold system of the present invention when the mold is closed; Fig.10 It is a partial cross-sectional schematic diagram of a power structure of a plastic mold system of the present invention; Fig.11 It is a schematic diagram of the overall structure of the ejector-ejection integrated intelligent mold of the present invention; Fig.12 It is a schematic diagram of the split structure of the integrated intelligent mold for ejection of ejector pins of the present invention; Fig.13 for Fig.11 AA cross-sectional view of .

[0029] Among them, the machine body 1, the injection molding mechanism 2, the injection molding unit 211, the conveying pipe 2111, the motor 2112, the conveying auger 2113, the second cylinder 2114, the injection molding top plate 212, the injection molding cavity 213, the retraction cavity 214, the slide 215, the air cavity 216, the first air pipe 217, the second air pipe 218, the power structure 3, the first cylinder 31, the fixing block 32, the limit strip 33, the cavity 331, the first chamber 3311, The second chamber 3312, the slider 34, the power unit 35, the push block 351, the first connecting rod 352, the second connecting rod 353, the third connecting rod 354, the covering part 36, the telescopic plate 361, the slide plate 362, the first air hole 37, the second air hole 38, the mold 4, the upper mold base 41, the air channel 411, the fixed mold plate 42, the movable mold plate 43, the lower mold base 44, the mold cavity 45, the core 46, the inclined rod 47, the ejector plate 48, and the ejector pin 49. DETAILED DESCRIPTION

[0030] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0031] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0032] This embodiment provides a plastic mold system, such as Figures 1 to 13 As shown, it includes a machine body 1, an injection molding mechanism 2 and a power structure 3 arranged on the machine body 1; the injection molding mechanism 2 is arranged on the right side above the machine body 1, and the power structure 3 is arranged on the left side above the machine body 1; Among them, Figure 2 and Figure 3 As shown, the injection molding mechanism 2 includes an injection molding unit 211 and an injection molding top plate 212 connected to the injection molding unit 211, an injection molding cavity 213 and at least one retraction cavity 214 are provided in the injection molding top plate 212, the injection molding cavity 213 is communicated with the retraction cavity 214, and a slide 215 is sealed and slidably connected in the retraction cavity 214; as an exemplary embodiment, the number of the retraction cavities 214 is two, of course, it can be understood that the number of the retraction cavities 214 can be three, four or more, and they can be opened and arranged according to actual processing and usage requirements.

[0033] As a preferred embodiment, Figures 5 to 10 As shown, the power structure 3 includes a first cylinder 31, a fixed block 32, two limit bars 33, a slider 34 and a power unit 35. The first cylinder 31 is installed on the fixed block 32, and the piston rod of the first cylinder 31 passes through the fixed block 32 and is connected to the slider 34, which is used to drive the slider 34 to move left or right. The two limit bars 33 are symmetrically arranged on both sides of the fixed block 32. The two limit bars 33 are arranged on the side close to each other with a cavity 331, and the cavity 331 is open at one end. The two cavities 331 are covered with a cover 36, and the cover 36 is sealingly and slidably connected to the limit bars 33 to slide and seal the cavity 331. Both sides of the slider 34 extend into the cavities 331 of the two limit bars 33 respectively and can slide in the cavities 331. The two limit bars 33 guide the slider 34, avoiding the trouble of the first cylinder 31 directly driving the lower mold base 44 to move unstably, thereby improving the stability of the entire structure. At the same time, the slider 34 also divides the cavity 331 into a first chamber 3311 and a second chamber 3312. The first chamber 3311 is used to communicate with the retraction chamber 214.

[0034] In a possible implementation manner, the portion of the slider 34 extending into the cavity 331 is covered with a sealing strip, so that the slider 34 can better ensure air tightness when sliding in the cavity 331 .

[0035] Furthermore, if Figure 7 , Figure 8 and Fig. 9 As shown, the covering member 36 includes a telescopic plate 361 and a slide plate 362 arranged on the limit strip 33; the left side of the telescopic plate 361 is sealed and connected to the fixed block 32, and the right end of the telescopic plate 361 is connected to the slider 34, the telescopic plate 361 can be extended or shortened, and the slider 34 can drive the telescopic plate 361 and the slide plate 362 to move, and the telescopic plate 361 and the slide plate 362 are used to seal and cover the cavity 331; the functions of the telescopic plate 361 and the slide plate 362 are both used to seal the first chamber 3311 and the second chamber 3312 to avoid deflation and air leakage when the slider 34 slides; the telescopic plate 361 and the slide plate 362 are respectively arranged on the left and right sides of the slide plate 362, the telescopic plate 361 can extend or shorten with the slide plate 362, and the telescopic plate 361 is used to seal the second chamber 3312.

[0036] Of course, in a possible implementation, the slide plate 362 can also be replaced with a telescopic plate 361, that is, two telescopic plates 361 are arranged on both sides of the slider 34; when the slider 34 moves, the telescopic plates 361 are driven to expand and contract accordingly, and the movement of the slider 34 changes the volume of the first chamber 3311 and the second chamber 3312, thereby causing an inhalation or exhalation action.

[0037] According to the above technical solution, both sides of the slider 34 extend into the cavity 331 of the limit strip 33, and the slider 34 divides the cavity 331 into a first chamber 3311 and a second chamber 3312. When the mold is opened, the first cylinder 31 drives the slider 34 to move to the left. At this time, the volume of the first chamber 3311 increases, and the volume of the second chamber 3312 decreases. Since the first chamber 3311 is connected to the return chamber 214 through the first air pipe 217, the air pressure inside the first chamber 3311 decreases, and the return chamber 214 has a low pressure. Part of the molten plastic in the injection chamber 213 enters the return chamber 214, thereby achieving the purpose of decompression and preventing the molten plastic from overflowing from the end of the injection chamber 213 under high pressure.

[0038] As a preferred embodiment, Figure 2 , Figure 3 As shown, at least one air cavity 216 is further provided on the injection molding top plate 212, and the number of the air cavities 216 is the same as the number of the retraction cavities 214. As a preferred embodiment, the number of the retraction cavities 214 and the number of the air cavities 216 are both two; the air cavities 216 are interconnected with the corresponding retraction cavities 214, and each air cavity 216 is interconnected with the first air pipe 217; like Figure 7 and Fig.10 As shown, the two limiting strips 33 are each provided with a first air hole 37 communicating with the first chamber 3311 , and the first air hole 37 is communicated with one end of the first air pipe 217 .

[0039] According to the above technical solution, by opening a first air hole 37 connected to the first chamber 3311 on the two limit strips 33, the first air hole 37 allows the gas in the first chamber 3311 to exchange with the outside (or the return chamber 214 of the injection molding mechanism 2); the first air hole 37 and the first air pipe 217 are interconnected to form a complete gas flow path. When the first cylinder 31 drives the slider 34 to move, the volume of the first chamber 3311 changes, causing the internal air pressure to change. The air pressure change is transmitted to the air cavity 216 and the return chamber 214 through the first air hole 37 and the first air pipe 217.

[0040] As a preferred embodiment, the two limiting strips 33 are provided with second air holes 38 connected to the second chamber 3312, and the second air holes 38 are connected with the second air pipe 218, and the second air pipe 218 is used to connect with the mold 4. According to the above technical solution, in the injection stage, the power mechanism makes the mold 4 in a mold-closing state, and the molten plastic is injected into the injection cavity 213 under the action of the injection unit 211; at this time, since the volume of the first chamber 3311 does not change, the slide 215 is located in the retraction cavity 214 and remains stable, and the slide 215 plays a role in blocking the molten plastic from entering the air cavity 216, and the injection cavity 213 performs injection molding on the mold 4. When the mold is opened, the first cylinder 31 drives the slider 34 to move to the left. The movement of the slider 34 drives the volume of the second chamber 3312 of the two limit bars 33 to become smaller. Since the second air hole 38 connected to the second chamber 3312 is connected to the second air pipe 218, under the action of air pressure, the gas in the second chamber 3312 enters the mold 4 through the second air pipe 218 to blow air to the injection molded part, thereby accelerating the cooling of the injection molded part. At the same time, the blowing can also blow the injection molded part out of the mold, making it easier to demold the injection molded part.

[0041] As a preferred embodiment, Figure 2 and Figure 4 As shown, the injection unit 211 includes a delivery pipe 2111 and a hopper (not shown) connected to the delivery pipe 2111 , an electromagnetic coil (not shown) is wound around the delivery pipe 2111 , and the interior of the delivery pipe 2111 is connected to the injection cavity 213 .

[0042] like Figure 2As shown, the injection unit 211 also includes a motor 2112, a conveying auger 2113 coaxially connected to the output shaft of the motor 2112, and a second cylinder 2114. The motor 2112 drives the conveying auger 2113 to rotate, and the conveying auger 2113 is coaxially connected to the conveying pipe 2111. The second cylinder 2114 can push the motor 2112 and the conveying auger 2113 to move along the length direction of the machine body 1. According to the above technical solution, the motor 2112, the second cylinder 2114 and the electromagnetic coil are started, and the second cylinder 2114 can push the motor 2112 and the conveying auger 2113 to move; the motor 2112 drives the conveying auger 2113 to rotate and start conveying plastic particles. At the same time, the electromagnetic coil heats and melts the plastic particles in the conveying pipe 2111. During the movement, the heated and melted plastic particles continue to move forward under the push of the conveying auger 2113 and the second cylinder 2114 until they enter the injection cavity 213. The addition of the second cylinder 2114 enables the injection unit 211 to apply greater pressure during the injection molding process. When the second cylinder 2114 pushes the motor 2112 and the conveying auger 2113 forward, it not only increases the pushing force of the conveying auger 2113 on the plastic particles, but also converts this force into additional pressure on the molten plastic in the injection cavity 213 through the transmission of the mechanical structure, which helps to improve the density and surface quality of the injection molded parts and reduce the internal voids and defects of the injection molded parts. By controlling the thrust and movement speed of the second cylinder 2114, the pressure in the injection molding process can also be flexibly adjusted, making the injection molding process more refined and controllable, which helps to meet the special pressure requirements of different injection molded parts. Compared with the traditional form of only using the conveying auger 2113 to push, the coordinated work of the second cylinder 2114, the motor 2112 and the conveying auger 2113 of this embodiment ensures the continuous and stable conveying of plastic particles. During the conveying process, even if the particles are of different sizes or uneven densities, the thrust of the second cylinder 2114 can help the conveying auger 2113 overcome resistance and maintain a stable conveying speed, which helps to reduce fluctuations and uncertainties in the injection molding process and improve injection molding efficiency.

[0043] As a preferred embodiment, Figure 5 , Figure 6As shown, the power unit 35 includes a pushing block 351, two first connecting rods 352, two second connecting rods 353 and two third connecting rods 354. The two first connecting rods 352 are symmetrically hinged to the pushing block 351, the two second connecting rods 353 are respectively hinged to the corresponding two first connecting rods 352, and the free ends of the two second connecting rods 353 are respectively symmetrically hinged to the fixed block 32; the two sides of the slider 34 are respectively hinged to one end of the two third connecting rods 354, and the other ends of the two third connecting rods 354 are respectively hinged to the two second connecting rods 353; wherein, the hinge point of the second connecting rod 353 and the third connecting rod 354 is located at two-thirds of the second connecting rod 353 close to the first connecting rod 352. According to the above technical solution, the first cylinder 31 is installed on the fixed block 32, and the piston end of the first cylinder 31 passes through the fixed block 32 and is connected to the slider 34, which is used to push the slider 34 to move. The movement of the slider 34 drives the angle of the third connecting rod 354 to change, and the third connecting rod 354 drives the angle of the second connecting rod 353 to change, which acts on the first connecting rod 352. The first connecting rod 352 drives the pushing block 351 to move, and the pushing block 351 is connected to the lower mold base 44 of the mold 4, which is used to drive the mold 4 to open or close the mold; since the first cylinder 31 adopts a pneumatic form, the impact force is often very large in actual use, and the mold 4 is a high-precision component. When the first cylinder 31 is used in the injection molding equipment, it often causes great damage to the mold 4, which can easily lead to unqualified molded injection molded parts; in The power unit 35 of this embodiment is arranged in the form of a multi-stage connecting rod transmission, which can convert the linear motion of the first cylinder 31 into a smooth movement of the push block 351, reducing the impact and vibration during the movement, thereby improving the stability and controllability of the mold 4 when opening or closing the mold; this transmission method can better control the movement trajectory and speed of the push block 351, ensuring the accuracy and consistency of the mold 4 during the opening or closing process. This embodiment transmits the force generated by the first cylinder 31 through multiple stages, gradually reducing the impact and finally acting on the push block 351, thereby optimizing the overall layout and structural design of the mold 4. In a possible implementation method, different movement trajectories and speed requirements can also be achieved by changing parameters such as the length, angle and connection method of each connecting rod.

[0044] On the other hand, the present invention also proposes an integrated intelligent mold 4 with ejector pins 49, including a mold body, such as Fig.11 , Fig.12 and Fig.13 As shown, the mold body includes an upper mold base 41, a fixed mold plate 42, a movable mold plate 43 and a lower mold base 44. A top plate 48 and an ejector pin 49 are arranged between the movable mold plate 43 and the lower mold base 44. The top plate 48 can move to drive the ejector pin 49 to eject the injection molded part out of the mold. The top plate 48 drives the ejector pin 49 to move to demold the injection molded part, which is a conventional technical means in the prior art and will not be described in detail in this embodiment. This embodiment also includes the plastic mold 4 system as described above, and the mold 4 body is arranged between the injection molding top plate 212 and the push block 351; The upper mold base 41 is detachably connected to the injection molding top plate 212 , and the lower mold base 44 is detachably connected to the push block 351 . In this embodiment, the detachable connections are all in the form of being tightened and fixed by bolts and nuts.

[0045] As a preferred embodiment, Fig.12 As shown, two groups of molding units are arranged between the fixed mold plate 42 and the movable mold plate 43. The fixed mold plate 42, the movable mold plate 43 and the gap between the two molding units together enclose a molding cavity 45, and the molding cavity 45 is used to mold injection molded parts.

[0046] Furthermore, the molding unit includes two cores 46, which are symmetrically slidably arranged on the movable template 43, and the two cores 46 can approach or move away from each other; as an exemplary embodiment, the number of cores 46 in this embodiment is four, and the four cores 46 are all provided with inclined through holes, and four inclined tie rods 47 that penetrate the fixed template 42 are fixedly arranged on the upper mold base 41, and the inclined tie rods 47 are adapted to the through holes; when the mold is closed, the four cores 46 approach each other, and when the fixed template 42 and the movable template 43 are fitted with each other, the gaps between the fixed template 42, the movable template 43 and the four cores 46 are jointly enclosed to form a cavity 45, and the cavity 45 is used to mold injection molded parts; when the mold is opened, the four cores 46 move away from each other; the cores 46 of the present invention are in a form that can approach or move away from each other, which facilitates the demolding of injection molded parts and greatly improves the demolding efficiency.

[0047] As a preferred embodiment, Fig.13 As shown, an air passage 411 is provided in the upper die seat 41, and the air passage 411 is connected to the second air pipe 218; an air injection hole is provided on the inclined tie rod 47, and the air passage 411 is connected to each air injection hole. According to the above technical scheme, when the mold is opened, the first cylinder 31 drives the slider 34 to move to the left, and the movement of the slider 34 drives the volume of the second chamber 3312 of the two limit strips 33 to become smaller. Since the second air hole 38 connected to the second chamber 3312 is connected to the second air pipe 218, due to the effect of air pressure, the gas in the second chamber 3312 passes into the second air pipe 218, and the second air pipe 218 supplies air to the air channel 411. The gas in the air channel 411 is ejected from the air jet hole through the air channel 411 inside the inclined rod 47; the molded injection molded part is blown to make the injection molded part separate from the mold 4. The injection hole is used to blow the injection molded part, which is convenient for cooling and demolding the injection molded part. At the same time, it can also blow away the dust that falls on the injection molded part when the mold is opened, thereby improving the quality of the injection molded part.

[0048] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A plastic mold system, characterized in that: include: A machine body (1), an injection molding mechanism (2) and a power structure (3) arranged on the machine body (1); The injection molding mechanism (2) comprises an injection molding unit (211) and an injection molding top plate (212) connected to the injection molding unit (211); an injection molding cavity (213) and at least one return cavity (214) are provided in the injection molding top plate (212); the injection molding cavity (213) is communicated with the return cavity (214); a sliding plate (215) is sealed and slidably connected in the return cavity (214); The power structure (3) comprises a first cylinder (31), a fixed block (32), two limit bars (33), a slider (34) and a power unit (35); the first cylinder (31) is used to drive the slider (34) to move; the two limit bars (33) are symmetrically arranged on both sides of the fixed block (32); a cavity (331) is arranged in each of the two limit bars (33); a cover (36) is provided on the cavity (331); the cover (36) covers the limit bars (33) to seal the cavity (331); The two sides of the slider (34) respectively extend into the cavities (331) of the two limit bars (33) and can slide in the cavities (331); the slider (34) divides the cavity (331) into a first chamber (3311) and a second chamber (3312); the first chamber (3311) is connected to the retraction chamber (214).

2. The plastic mold system according to claim 1, characterized in that: At least one air cavity (216) is also formed on the injection molding top plate (212), each of the air cavities (216) is in communication with one of the return cavities (214), and each of the air cavities (216) is in communication with a first air pipe (217); Each of the limiting strips (33) is provided with a first air hole (37) connected to the first chamber (3311), and the first air hole (37) is connected to the free end of the first air pipe (217).

3. The plastic mold system according to claim 1, characterized in that: Each of the limiting strips (33) is provided with a second air hole (38) which is in communication with the second chamber (3312); the second air hole (38) is connected to a second air pipe (218); and the free end of the second air pipe (218) is used for connecting to the mould (4).

4. The plastic mold system according to claim 3, characterized in that: The injection molding unit (211) comprises a conveying pipe (2111) and a hopper connected to the conveying pipe (2111); an electromagnetic coil is wound around the conveying pipe (2111); and the interior of the conveying pipe (2111) is connected to the injection molding cavity (213); The injection molding unit (211) further comprises a motor (2112), a conveying auger (2113) coaxially connected to an output shaft of the motor (2112), and a second cylinder (2114); the motor (2112) drives the conveying auger (2113) to rotate; the conveying auger (2113) is coaxially rotatably connected in the conveying pipe (2111); and the second cylinder (2114) can drive the motor (2112) and the conveying auger (2113) to move along the length direction of the machine body (1).

5. The plastic mold system according to claim 4, characterized in that: The power unit (35) comprises a pushing block (351), two first connecting rods (352), two second connecting rods (353) and two third connecting rods (354); the two first connecting rods (352) are respectively symmetrically hinged to the pushing block (351); the two second connecting rods (353) are respectively hinged to the corresponding two first connecting rods (352); and the free ends of the two second connecting rods (353) are respectively symmetrically hinged to the fixing block (32); Both sides of the slider (34) are respectively hinged to one end of the two third connecting rods (354), and the other ends of the two third connecting rods (354) are respectively hinged to the two second connecting rods (353); wherein the hinge point between the second connecting rod (353) and the third connecting rod (354) is located at two-thirds of the second connecting rod (353) close to the first connecting rod (352).

6. The plastic mold system according to claim 5, characterized in that: The covering member (36) comprises a telescopic plate (361) and a slide plate (362) arranged on the limiting strip (33); one side of the telescopic plate (361) is connected to the fixed block (32); the other end of the telescopic plate (361) is connected to the slide block (34); the telescopic plate (361) can be extended or shortened; the telescopic plate (361) is used to cover the second chamber (3312); The slide plate (362) is sealingly connected to the limiting strip (33) to cover the first chamber (3311), and the sliding block (34) can drive the slide plate (362) to move.

7. An integrated intelligent mold with ejector pins, comprising a mold body, wherein the mold body comprises an upper mold base (41), a fixed mold plate (42), a movable mold plate (43) and a lower mold base (44), characterized in that: It also includes the plastic mold system according to any one of claims 1 to 6, wherein the mold body is arranged between the injection molding top plate (212) and the pushing block (351); The upper mold base (41) is detachably connected to the injection molding top plate (212), and the lower mold base (44) is detachably connected to the pushing block (351).

8. The integrated intelligent mold with ejector pins according to claim 7, characterized in that: Two groups of molding units are provided between the fixed mold plate (42) and the movable mold plate (43); the fixed mold plate (42), the movable mold plate (43) and the gap between the two molding units together enclose a molding cavity (45); the molding cavity (45) is used for molding injection molded parts.

9. The integrated intelligent mold with ejector pins according to claim 8, characterized in that: The molding unit comprises two cores (46), the two cores (46) are symmetrically slidably arranged on the movable mold plate (43), and the two cores (46) can be moved closer to or farther away from each other; Each of the cores (46) is provided with a through hole, and four inclined tie rods (47) penetrating the fixed die plate (42) are fixedly provided on the upper die seat (41), and the inclined tie rods (47) are adapted to the through holes; When the mold is closed, the cores (46) are close to each other; When the mold is opened, the cores (46) move away from each other.

10. The integrated intelligent mold with ejector pins according to claim 9, characterized in that: An air passage (411) is provided in the upper die seat (41), and the air passage (411) is connected to the second air pipe (218); The inclined tie rod (47) is provided with an air jet hole, and the air passage (411) is connected to each of the air jet holes.

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