Injection mold based on plastic product processing

Abstract

The invention discloses an injection mold based on plastic product machining, and relates to the technical field of plastic product machining, the injection mold based on plastic product machining comprises steps, a bottom frame is fixed to the three sets of steps, and vertical frames are longitudinally arranged on the bottom frame in a triangular equidistant shape; the vertical frames are vertically provided with charging barrels for injection molding of materials through three hoppers, upper molds are fixed to the outer sides of the vertical frames, lower molds matched with the upper molds in a mold closing mode and box bodies fixed to the two sides of the lower molds are arranged below the upper molds, and switching assemblies used for mold opening and closing operation of the upper molds and the lower molds are arranged on the inner sides of the three sets of vertical frames. According to the multi-mold-cavity injection molding machine, multi-mold-cavity injection molding operation that a single person can freely switch and operate a plurality of molds is achieved, the functions of meshing and clamping measures can be synchronously matched while mechanical mold closing is conducted, uniform and comprehensive material distribution operation is conducted on injection molding materials in a multi-channel way on the basis of the spiral heating material extrusion condition, and high efficiency and high quality are achieved.

Description

Technical Field

[0001] This invention relates to the field of plastic product processing technology, and in particular to an injection mold for processing plastic products. Background Technology

[0002] Plastic products are a general term for household and industrial products made primarily from plastics. This includes all injection-molded products made from plastics. Plastics are a type of synthetic polymer material with plasticity, and specialized molds are used to injection mold plastic products according to their molding requirements.

[0003] However, in practical applications, there are still some unresolved problems. During the injection molding of plastic products using molds, the basic operation mode is one person per station, which results in low-efficiency molding of a single plastic product, high labor costs, and waste of equipment resources.

[0004] Secondly, the traditional mold opening and closing method is basically done manually with the help of auxiliary tools. Since the injection material needs to be kept heated and is easily affected by external factors inside the mold, thermal expansion and contraction will occur, resulting in gaps in the mold after manual mold closing. This can lead to material leakage and dust entering, or even incomplete molding of plastic products and quality problems.

[0005] Furthermore, the way injection molding materials are squeezed into the mold cavity often adopts a passive flow method, that is, relying on the fluidity of the injection molding material itself to distribute into the mold cavity. This results in uneven distribution of injection molding materials, which directly causes molding quality problems in plastic products, with a high defect rate, increased costs, and low product strength and competitiveness of plastic products. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0007] In view of the problems existing in the above and / or existing injection molds for processing plastic products, the present invention is proposed.

[0008] Therefore, the problem to be solved by this invention is how to solve the problem of multi-cavity injection molding operations where a single person can freely switch between multiple molds, but which lacks the function of simultaneous mechanical mold closing and meshing clamping measures, and cannot use a multi-channel approach to uniformly and comprehensively distribute the injection material under spiral heating extrusion conditions.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an injection mold for processing plastic products, comprising steps, a base frame fixed on the three sets of steps, and vertical frames arranged longitudinally in a triangular equidistant pattern on the base frame, and a material cylinder for injecting material through three hoppers arranged longitudinally on the vertical frames, with an upper mold fixed to the outer side of the vertical frames, and a lower mold for mold closing and cooperating with the upper mold provided below the upper mold; and a box body fixed on both sides of the lower mold, and a switching component for opening and closing the upper and lower molds provided on the inner side of the three sets of vertical frames, the switching component including an embedded... A dual-head motor is located in the middle of the base frame, and a drive bevel gear is fixed on one of the output shafts of the dual-head motor. A limiting component for clamping the upper and lower molds after they are closed is provided inside the box. The limiting component includes toothed columns fixed on both sides of the upper mold. An extrusion component for spiral feeding of injection molding material is provided inside the material barrel. The extrusion component includes a second electric push rod fixed on the other output shaft of the dual-head motor. Feeding components for feeding material to the upper and lower molds are provided at the three feeding ports of the material barrel. The feeding components include feeding heads connected to the outer ends of the three feeding ports.

[0010] As a preferred embodiment of the injection mold based on plastic product processing according to the present invention, the switching component further includes a double-sided bevel gear meshing with the bottom of the drive bevel gear, and a differential bevel gear is provided on the outside of the double-sided bevel gear. A first electric push rod is fixed on the differential bevel gear and used to adjust the meshing stroke of the differential bevel gear and the double-sided bevel gear.

[0011] As a preferred embodiment of the injection mold based on plastic product processing according to the present invention, wherein: a lead screw is fixed on the piston rod of the first electric push rod and rotates with the vertical frame, and a threaded sleeve is threaded on the lead screw and fixed to the lower mold through a connecting piece on the outside of the threaded sleeve; a vertical sliding groove is opened on the outside of the vertical frame to limit and slide with the connecting piece; and a guide plate is fixed on the inside of the lower mold to slide with a pre-reserved guide groove on the base frame.

[0012] As a preferred embodiment of the injection mold based on plastic product processing according to the present invention, the limiting component further includes a limiting sleeve fixed inside the box body and slidingly engaged with the toothed column, and a round gear meshing on one side of the toothed column groove, and a ratchet is sleeved on the inner side of the round gear through a rotating rod.

[0013] As a preferred embodiment of the injection mold based on plastic product processing according to the present invention, the ratchet is engaged with a pawl on its outer side, and a compression spring that is fixedly matched with the box body is fixed on the outer side of the pawl. A lever that is rotatably matched with the box body is fixed on the outer side of the pawl, and an anti-slip sleeve is sleeved on the outer side of the lever.

[0014] As a preferred embodiment of the injection mold based on plastic product processing according to the present invention, the extrusion assembly further includes a locking head fixed on the piston rod of the second electric push rod, and a locking seat is provided above the locking head. A spiral extrusion frame that rotates with the material cylinder is fixed on the locking seat and adopts a hollow design.

[0015] As a preferred embodiment of the injection mold based on plastic product processing according to the present invention, the top of the spiral extruder is provided with a sealed bearing, the top of the barrel is fixed with a heater, and a heating rod sleeved with the sealed bearing is provided at the bottom of the heater. The heating rod extends to the bottom of the spiral extruder, and an insulation sleeve is provided on the outside of the barrel.

[0016] As a preferred embodiment of the injection mold based on plastic product processing according to the present invention, the feeding assembly further includes a feeding pipe connected to the outer end of the feeding head, and adopts a quantitative valve for quantitative feeding design. The end of the feeding pipe is connected to a main pipe rack, and the bottom end of the main pipe rack is connected to a main material head connected to the upper mold channel.

[0017] As a preferred embodiment of the injection mold based on plastic product processing according to the present invention, the main tube frame is connected to manifold frames at both ends, and the inner end of the manifold frame is arrayed with auxiliary nozzles that communicate and cooperate with the upper mold. A buffer pad is provided on the outer side of the upper mold near the main material head, and a vibration motor is fixed around the buffer pad.

[0018] As a preferred embodiment of the injection mold based on plastic product processing according to the present invention, wherein: the four limbs of the three sets of upper mold cavities are provided with mold cavities, and the inner cavities of the three sets of lower molds are provided with mold heads that match the mold cavities, and a flow channel groove for feeding material to the main material head and the secondary nozzle is reserved on the side of the upper mold near the mold cavity.

[0019] The beneficial effects of this invention are as follows: By switching the stroke of one or more first electric push rods of the switching component, the needs of multi-cavity injection molding operations with multiple molds operated by a single person can be met, making the operation flexible; by using the limiting component, secondary clamping and locking measures are provided for the upper and lower molds in the mold closing and positioning state to prevent gaps caused by thermal expansion and contraction of the injection material inside, making the operation more compact; and by using the extrusion component, the required injection material is forced to pass through the main material head on the main tube rack of the feeding component and the auxiliary nozzle on the outside, and is fed into the sealed mold cavity between the upper and lower molds in a separate and quantitative manner, with multiple channels operating simultaneously to prevent the injection material from becoming blocked. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an initial state diagram of an injection mold used for processing plastic products.

[0022] Figure 2 This is a diagram showing the mold closing state of a single mold for injection molding based on plastic product processing.

[0023] Figure 3 This is a diagram showing the mold closing state of multiple molds used in injection molding for plastic product processing.

[0024] Figure 4 This is a diagram showing the demolding state of a single mold for injection molds used in plastic product processing.

[0025] Figure 5 This is a diagram showing the demolding state of multiple molds used in injection molds for processing plastic products.

[0026] Figure 6 This is a partial bottom view of an injection mold used for processing plastic products.

[0027] Figure 7 This is a partial top view of an injection mold used for processing plastic products.

[0028] Figure 8 This is a diagram showing the mold closing state of the switching components, limiting components, and ejector components of an injection mold for processing plastic products.

[0029] Figure 9 This is a demolding diagram of the switching components, limiting components, and ejector components of an injection mold for processing plastic products.

[0030] Figure 10 This is a side sectional view of the box body and restraint components of an injection mold for processing plastic products.

[0031] Figure 11 This is an exploded top view of the ejector assembly of an injection mold used for processing plastic products.

[0032] Figure 12 This is a bottom view of the extrusion and feeding components of an injection mold for processing plastic products.

[0033] Figure 13 This is a top view of the extrusion and feeding components of an injection mold for processing plastic products.

[0034] Figure 14This is an exploded cross-sectional view of the barrel and extrusion assembly of an injection mold for processing plastic products.

[0035] Figure 15 This is a partial cross-sectional view of the extrusion assembly of an injection mold for processing plastic products.

[0036] Figure 16 This is a partial exploded view of the feeding assembly of an injection mold for processing plastic products.

[0037] Figure 17 This is an exploded bottom view of the upper mold of an injection mold used for processing plastic products.

[0038] Figure 18 This is a partial side view of an injection mold used for processing plastic products.

[0039] In the diagram: 1. Step; 2. Base frame; 3. Vertical frame; 4. Material cylinder; 5. Hopper; 6. Upper mold; 7. Lower mold; 8. Box body; 91. Double-headed motor; 92. Drive bevel gear; 93. Double-sided bevel gear; 94. Differential bevel gear; 95. First electric push rod; 96. Lead screw; 97. Lead sleeve; 101. Gear column; 102. Limiting sleeve; 103. Circular gear; 104. Ratchet; 105. Pawl; 106. Compression spring; 107. Lever; 111. Second electric push rod; 112. Locking head; 113. Locking seat; 114. Spiral extrusion frame; 11 5. Sealed bearing; 116. Heater; 117. Heating rod; 121. Feed head; 122. Metering valve; 123. Feed pipe; 124. Main pipe rack; 125. Main feed head; 126. Manifold rack; 127. Secondary nozzle; 131. Ejector rod; 132. Support leg; 133. Positioning sleeve; 134. Spring; 135. Top seat; 136. Ejector pin; 137. Reserved hole; 14. Vertical slide groove; 15. Guide rail groove; 16. Guide rail plate; 17. Insulation sleeve; 18. Buffer pad; 19. Vibration motor; 20. Mold cavity; 21. Mold head; 22. Pad frame. Detailed Implementation

[0040] 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.

[0041] 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.

[0042] Secondly, the term "one 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 in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0043] Example 1, referring to Figures 1 to 11 This is the first embodiment of the present invention. This embodiment provides an injection mold for processing plastic products, including steps 1, a base frame 2 fixed on three sets of steps 1, and vertical frames 3 arranged longitudinally in a triangular equidistant shape on the base frame 2. A material cylinder 4 through which three hoppers 5 are used to inject molding materials is arranged longitudinally on the vertical frames 3. The outer ends of the three hoppers 5 are all connected by threaded caps, which are opened when adding material and closed when not adding material to prevent external dust from entering the material cylinder 4 and to prevent the injection material from being squeezed out from the hoppers 5.

[0044] Furthermore, an upper mold 6 is fixed to the outer side of the vertical frame 3, and a lower mold 7 is provided below the upper mold 6 to cooperate with it. Each of the four limbs of the inner cavity of the three sets of upper molds 6 is provided with a mold cavity 20, and the inner cavity of the three sets of lower molds 7 is provided with a mold head 21 to cooperate with the mold cavity 20. Each set of upper molds 6 and lower molds 7 has four sets of mold cavities 20 and mold heads 21, which can be replaced according to the specifications and quantity of the injection molded products to achieve efficient injection molding with multiple mold cavities. The inner sides of the three sets of steps 1 are staggered. A support frame 22 is provided and located in front of the lower mold 7, so that the staff can stand on the support frame 22 to take out the injection molded product from the mold head 21 of the lower mold 7 after injection molding and demolding. A hollow anti-slip standing station area is provided on the support frame 22 to prevent the soles of the shoes of the staff standing on the support frame 22 from slipping. Boxes 8 are fixed on both sides of the lower mold 7, and scale grooves are provided on the outer circumference of the boxes 8, with corresponding pointers rotating in them.

[0045] Specifically, the inner sides of the three sets of vertical frames 3 are equipped with switching components for opening and closing operations of the upper mold 6 and the lower mold 7. The switching components include a double-headed motor 91 embedded in the middle of the base frame 2, and a drive bevel gear 92 fixed on one output shaft of the double-headed motor 91. The switching components also include a double-sided bevel gear 93 meshing with the bottom of the drive bevel gear 92, which rotates with the base frame 2. A differential bevel gear 94 is provided on the outer side of the double-sided bevel gear 93. The double-sided bevel gear 93 and the differential bevel gear 94 are both distributed in a triangular equidistant shape along the longitudinal axis of the drive bevel gear 92 to improve the rationality of their distribution. A first electric push rod 95 is fixed on the differential bevel gear 94 and is used to adjust the meshing stroke of the differential bevel gear 94 and the double-sided bevel gear 93, so as to realize the gear meshing at single and multiple molds and flexibly switch them.

[0046] According to the injection molding specifications and quantity requirements of the plastic product, firstly control one or more first electric push rods 95 to open, and then the one or more first electric push rods 95 will drive one or more sets of differential bevel gears 94 to move down to the meshing part of the double-sided bevel gear 93. Then, control the double-head motor 91 to open and drive the double-sided bevel gear 93 to rotate linearly through the drive bevel gear 92. Subsequently, the double-sided bevel gear 93 will drive the one or more sets of differential bevel gears 94 that are in place to rotate.

[0047] Specifically, a lead screw 96 is fixed on the piston rod of the first electric push rod 95 and rotates with the vertical frame 3. A threaded sleeve 97 is threaded onto the lead screw 96 and fixed to the lower mold 7 on the outside of the sleeve 97 via a connector. A vertical sliding groove 14 is provided on the outside of the vertical frame 3 to limit the sliding of the connector, which serves to limit the sliding of the connector on the sleeve 97. This supports the connector while preventing it from shaking or getting stuck during the lifting and lowering of the sleeve 97. A guide rail plate 16 is fixed on the inside of the lower mold 7 and slides with the pre-reserved guide rail groove 15 on the base frame 2. This serves to limit the sliding of the lower mold 7 during the up and down movement, preventing it from shaking or tilting during the lifting and lowering of the lower mold 7.

[0048] When the double-sided bevel gear 93 drives the meshed single or multiple sets of differential bevel gears 94 to rotate linearly, the single or multiple sets of differential bevel gears 94 drive the single or multiple sets of lead screws 96 to rotate in the forward direction through the single or multiple first electric push rods 95. The single or multiple lead screws 96 drive the single or multiple sets of lower molds 7 that conform to the specifications of the injection molded product to move upward through the connecting parts on the screw sleeve 97, until the single or multiple sets of lower molds 7 move upward to the fixed upper mold 6 and close with it. This meets the needs of multi-cavity injection molding operations with multiple molds operated by a single person. The operation is flexible, the labor cost is low, the efficiency is high, and the equipment resources are not wasted.

[0049] Specifically, a limiting component is provided inside the box body 8 for clamping the upper mold 6 and the lower mold 7 after they are closed. The limiting component includes toothed pillars 101 fixed on both sides of the upper mold 6, a limiting sleeve 102 fixed inside the box body 8 and slidingly engaged with the toothed pillars 101, and a sprocket 103 meshing with one side of the tooth groove of the toothed pillars 101. A ratchet 104 is sleeved on the inner side of the sprocket 103 through a rotating rod. The outer side of the rotating rod is fixed to the pointer. The rotating rod drives the pointer to rotate along the scale groove, so that the value of the scale groove can be observed and the rotation angle and number of turns of the ratchet 104 can be known in time.

[0050] During the mold closing of one or more sets of lower molds 7 and upper molds 6 that meet the specifications of injection molded products, the spur gears 103 inside the two side boxes 8 that move upward with the one or more sets of lower molds 7 mesh and rotate in the tooth grooves of the toothed post 101 on both sides of the fixed upper mold 6. The rotating spur gears 103 synchronously drive the ratchet 104 to rotate linearly.

[0051] Specifically, a pawl 105 is engaged on the outer side of the ratchet 104, and a compression spring 106 is fixedly fitted to the outer side of the pawl 105 and is fixedly fitted to the outer side of the housing 8. A lever 107 is fixedly fitted to the outer side of the pawl 105 and is rotatably fitted to the housing 8. An anti-slip sleeve is fitted on the outer side of the lever 107. When it is necessary to release the ratchet 104 and pawl 105 in the reverse direction, the anti-slip sleeve is gripped and the lever 107 is pulled in the opposite direction, forcing the two sets of pawls 105 to disengage from the engagement area of ​​the ratchet 104 and compressing the compression spring 106. This releases the ratchet 104 and pawl 105 in the reverse direction, satisfying the demolding requirements of the lower mold 7.

[0052] While the ratchet 104 rotates synchronously with the sprocket 103, with the auxiliary elastic buffer and limiting action of the compression spring 106, the ratchet 104 also drives the pawl 105 on it to skip teeth until one or more sets of lower molds 7 and upper molds 6 are closed in place, stopping the skipping teeth. The ratchet 104 and pawl 105 provide reverse restraint measures for the single or multiple sets of lower molds 7 in the upward state, realizing secondary clamping restraint for the single or multiple sets of lower molds 7 and upper molds 6 after mechanical mold closing, so as to prevent the thermal expansion and contraction of the injection molding material entering the mold later. After mold closing, the single or multiple sets of lower molds 7 and upper molds 6 are subjected to expansion force and gaps appear, which not only prevents material leakage, but also prevents external dust from entering the single or multiple sets of lower molds 7 and upper molds 6 along the gaps, thus improving the molding quality of injection molded products.

[0053] Example 2, refer to Figures 6 to 11 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0054] Specifically, the lower mold 7 is provided with an ejector assembly for demolding the injection molded product after molding. The ejector assembly includes an ejector rod 131 that slides at the bottom of the lower mold 7, a support leg 132 that is fixed to the bottom of the ejector rod 131 and supported by the ground, and a positioning sleeve 133 that slides on the ejector rod 131 and is fixed to the bottom of the base frame 2. A spring 134 is sleeved on the outside of the ejector rod 131 and is fixedly engaged with the positioning sleeve 133 and the support leg 132. This spring plays an elastic buffering role for the ejector rod 131 during lifting and lowering, and also facilitates the elastic reset of the ejector rod 131.

[0055] After the mold cavity 20 and mold head 21 in one or more sets of lower molds 7 and upper molds 6 mold the injection material into the injection molded product, the reverse restriction measures of the lower mold 7 are first released, and then the double-head motor 91 is controlled to reverse. Similarly, one or more lead screws 96 drive one or more sets of lower molds 7 that meet the specifications of the injection molded product to move down through the connecting parts on the lead sleeve 97, and disengage from the upper mold 6 accordingly. At the same time as the one or more sets of lower molds 7 move down, the support leg 132 is also driven down through one or more ejector rods 131. The support leg 132 is subjected to the reaction force of the ground support, which forces the one or more ejector rods 131 to slide upward in the positioning sleeve 133 and lower mold 7, and correspondingly compress the spring 134.

[0056] Specifically, the ejector assembly also includes a top seat 135 that slides inside the lower mold 7 and is fixed to the head end of the ejector rod 131. The top seat 135 has an array of ejector pins 136 that slide through the lower mold 7. The lower mold 7 has four reserved holes 137 at the four corners near the mold head 21 that slide through the ejector pins 136. The top seat 135 has an array of docking pins at the outer side near the ejector pins 136. The lower mold 7 has four docking holes at the four corners near the outer side of the mold head 21 that slide through the docking pins. The top seat 135 drives the array of docking pins to slide upward in the docking holes, providing a limiting measure for the top seat 135 so that it slides stably up and down inside the lower mold 7.

[0057] As one or more ejector rods 131 move upward, they also drive the top seat 135 to slide upward within the lower mold 7. Subsequently, the top seat 135 drives the arrayed ejector pins 136 to push upward within the pre-drilled holes 137. The ejector pins 136 then eject the molded injection product that has adhered to the mold head 21 and demold it. The worker stands in the hollowed-out anti-slip standing station area on the pad 22. After removing the demolded injection product from the mold head 21, the double-head motor 91 and one or more first electric push rods 95 are turned off. The one or more first electric push rods 95 correspondingly drive one or more sets of differential bevel gears 94 to move upward and disengage from the meshing part of the double-sided bevel gear 93 to the initial position.

[0058] Example 3, referring to Figures 12-17 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0059] Specifically, the barrel 4 is equipped with an extrusion assembly for spiral feeding of injection molding materials. The extrusion assembly includes a second electric push rod 111 fixed on another output shaft of the dual-head motor 91. The extrusion assembly also includes a locking head 112 fixed on the piston rod of the second electric push rod 111, and a locking seat 113 is provided above the locking head 112. Both adopt a hexagonal snap-fit ​​design, which makes the snap-fit ​​more secure. A spiral extrusion frame 114 that rotates with the barrel 4 is fixed on the locking seat 113 and adopts a hollow design to reduce the rotational burden of the spiral extrusion frame 114.

[0060] After one or more first electric push rods 95 are closed and reset to their initial state, the heated injection material is placed into the barrel 4 through the three hoppers 5. Then, the second electric push rod 111 is first controlled to open and drive the locking head 112 to move upward and lock into the locking seat 113. Then, the dual-head motor 91 is controlled to drive the hollow spiral extrusion frame 114 on the locking seat 113, which is locked in place, to rotate linearly in the barrel 4 through the locking head 112 on the second electric push rod 111. This applies a spiral upward extrusion force to the injection material placed in the barrel 4 and spirally extrudes the injection material at the bottom of the barrel 4 to the top area, making the material supply smoother and faster.

[0061] Specifically, a sealed bearing 115 rotates on the top of the spiral extruder 114, and a heater 116 is fixed on the top of the barrel 4. A heating rod 117, which is sleeved with the sealed bearing 115, is provided at the bottom of the heater 116. The heater 116 heats the rotating spiral extruder 114 through the heating rod 117. The heat on the spiral extruder 114 is then conducted to the material area in the barrel to heat the injection molding material and increase the extrusion fluidity of the injection molding material. The heating rod 117 extends to the bottom of the spiral extruder 114, and an insulation sleeve 17 is provided on the outside of the barrel 4 to extend the heat preservation time of the injection molding material.

[0062] As the hollow spiral extruder 114 rotates linearly within the barrel 4, the spiral extruder 114 also drives the sealed bearing 115 to rotate at the top of the heating rod 117. The heater 116 is turned on and the heating rod 117 embedded in the spiral extruder 114 heats the injection molding material in the barrel 4 which is being spirally extruded upwards, so as to prevent the injection molding material from solidifying due to the influence of external temperature.

[0063] Specifically, the three feeding ports of the material cylinder 4 are equipped with feeding components for feeding the upper mold 6 and the lower mold 7. The feeding components include feeding heads 121 connected to the outer ends of the three feeding ports, and feeding pipes 123 connected to the outer ends of the feeding heads 121. The feeding components adopt a quantitative valve 122 for quantitative feeding. The end of the feeding pipe 123 is connected to a main pipe rack 124, and the bottom end of the main pipe rack 124 is connected to a main material head 125 connected to the channel of the upper mold 6. The main material head 125 adopts a large-diameter conveying channel design to prevent the injection molding material from clogging.

[0064] After the spiral extrusion rack 114 spirally extrudes the injection material at the bottom of the barrel 4 to the top area, it is then quantitatively fed and detected by one or more feeding heads 121 through the metering valve 122. The quantitatively fed injection material is then transported by the main pipe rack 124 on one or more feeding pipes 123 through the main material head 125 to the mold head 21 and mold cavity 20 area in one or more sets of lower molds 7 and upper molds 6 in the mold closing state.

[0065] Specifically, the two ends of the main tube frame 124 are connected to the manifold frame 126, and the inner end of the manifold frame 126 is arrayed with auxiliary nozzles 127 that communicate and cooperate with the upper mold 6. The auxiliary nozzles 127 are sealed with sealing gaskets to prevent material leakage at the connection between the auxiliary nozzles 127 and the upper mold 6. A flow channel groove is reserved on the side of the upper mold 6 near the mold cavity 20 to supply material to the main sprue head 125 and the auxiliary nozzles 127. This facilitates the injection material to be transported from the main sprue head 125 and the auxiliary nozzles 127 into the upper mold 6, and then through the flow channel groove to the molding area between the mold cavity 20 and the mold head 21 where the mold is closed. Multiple channels operate simultaneously to keep the injection material flowing smoothly and to prevent blockage. This achieves a fast and smooth distribution of the injection material. A buffer pad 18 is provided on the outer side of the upper mold 6 near the main sprue head 125, and a vibration motor 19 is fixed around the buffer pad 18.

[0066] Meanwhile, the injection material that arrives quantitatively in multiple main pipe racks 124 is then routed through single or multiple manifold racks 126 via auxiliary nozzles 127 to the mold heads 21 and mold cavities 20 in the single or multiple lower molds 7 and upper molds 6 in the mold-closed state. Molding operations are then performed in mold heads 21 and mold cavities 20 of different specifications. After the molding of single or multiple injection molded products is completed, the dual-head motor 91 and the second electric push rod 111 are controlled to close. The second electric push rod 111 drives the locking head 112 to move upward and lock into the locking seat 113, which facilitates the subsequent demolding operation.

[0067] Working principle: First, according to the injection molding specifications and quantity requirements of the plastic product, one or more first electric push rods 95 are opened. These first electric push rods 95 then drive one or more sets of differential bevel gears 94 to move downwards to the meshing part of the double-sided bevel gear 93. Next, the double-headed motor 91 is opened and drives the double-sided bevel gear 93 to rotate linearly via the drive bevel gear 92. Subsequently, the double-sided bevel gear 93 drives the engaged single or more sets of differential bevel gears 94 to rotate accordingly. When the double-sided bevel gear 93 drives the single or multiple sets of differential bevel gears 94 to rotate linearly, the single or multiple sets of differential bevel gears 94 drive the single or multiple sets of lead screws 96 to rotate in the forward direction through the single or multiple first electric push rods 95. The single or multiple lead screws 96 drive the single or multiple sets of lower molds 7 that conform to the specifications of the injection molded product to move upward through the connecting parts on the screw sleeve 97, until the single or multiple sets of lower molds 7 move upward to the fixed upper mold 6 and close with it.

[0068] Following this, during the mold closing of one or more sets of lower molds 7 and upper molds 6 conforming to the injection molded product specifications, the sprockets 103 inside the two side boxes 8, which move upwards with the single or multiple sets of lower molds 7, mesh and rotate within the tooth grooves of the toothed post 101 on both sides of the fixed upper mold 6. The rotating sprockets 103 synchronously drive the ratchet 104 to rotate linearly. While the ratchet 104 rotates synchronously with the sprockets 103, under the auxiliary elastic buffering and limiting cooperation of the compression spring 106, the ratchet 104 rotates accordingly. 104 also drives the pawl 105 on it to skip teeth until the single or multiple sets of lower molds 7 and upper molds 6 are closed in place, stopping the skipping teeth. The ratchet 104 and pawl 105 provide reverse restraint measures for the single or multiple sets of lower molds 7 in the upward state, realizing secondary clamping restraint for the single or multiple sets of lower molds 7 and upper molds 6 after mechanical mold closing, so as to prevent the thermal expansion and contraction of the injection material entering the mold later. After mold closing, the single or multiple sets of lower molds 7 and upper molds 6 are subjected to expansion force and gaps appear to avoid material leakage.

[0069] After one or more first electric push rods 95 are closed and reset to their initial state, the heated injection material is placed into the barrel 4 through the three hoppers 5. Then, the second electric push rod 111 is first controlled to open and drive the locking head 112 to move upward and lock into the locking seat 113. Then, the dual-head motor 91 is controlled to drive the hollow spiral extrusion frame 114 on the locking seat 113, which is locked in place, to rotate linearly in the barrel 4 through the locking head 112 on the second electric push rod 111. This applies a spiral upward extrusion force to the injection material placed in the barrel 4 and spirally extrudes the injection material at the bottom of the barrel 4 to the top area.

[0070] As the hollow spiral extruder 114 rotates linearly within the barrel 4, it also drives the sealed bearing 115 to rotate at the top of the heating rod 117. The heater 116 is activated, and the heating rod 117 embedded within the spiral extruder 114 provides uniform heating to the injection molding material being spirally extruded upwards within the barrel 4, preventing condensation due to external temperature variations. After the spiral extruder 114 spirally extrudes the injection molding material from the bottom of the barrel 4 to the top, it is then quantitatively fed and detected by one or more feeding heads 121 through a metering valve 122. The quantitatively fed injection molding material is then fed through one or more feeding pipes 123. The main tube rack 124 is conveyed through the main material head 125 to the mold head 21 and mold cavity 20 areas in one or more sets of lower molds 7 and upper molds 6 in the mold closing state; at the same time, the injection material that arrives in one or more main tube racks 124 is distributed to the mold head 21 and mold cavity 20 areas in one or more sets of lower molds 7 and upper molds 6 in the mold closing state through the auxiliary nozzles 127, and is then molded in mold heads 21 and mold cavities 20 of different specifications. After the molding of one or more sets of injection molded products is completed, the dual-head motor 91 and the second electric push rod 111 are controlled to close, and the second electric push rod 111 drives the locking head 112 to move upward and lock into the locking seat 113.

[0071] After the injection molding material is formed into an injection molded product by the mold cavity 20 and mold head 21 in one or more sets of lower molds 7 and upper molds 6, the double-head motor 91 is controlled to reverse. Similarly, one or more lead screws 96 drive one or more sets of lower molds 7 conforming to the specifications of the injection molded product to move downward through the connecting parts on the lead sleeve 97, and correspondingly disengage from the upper mold 6. At the same time as the one or more sets of lower molds 7 move downward, the support leg 132 is also driven to move downward through one or more ejector rods 131. The support leg 132 is subjected to the reaction force of the ground support, which forces the one or more ejector rods 131 to slide upward in the positioning sleeve 133 and lower mold 7, and correspondingly compress the spring 134. At the same time as the one or more ejector rods 131 move upward, they also drive the top seat 135 to slide upward in the lower mold 7, and then... The top seat 135 drives the array of ejector pins 136 to push upwards in the reserved hole 137. At the same time, the top seat 135 also drives the array of docking pins to slide upwards in the docking hole. With the help of the limiting measures provided by the top seat 135, the ejector pins 136 eject the injection molded product that is adhered to the mold head 21 and demold it. The worker stands in the hollow anti-slip standing station area on the pad 22. After the injection molded product ejected from the mold head 21 is removed, the double-head motor 91 and one or more first electric push rods 95 are turned off. The one or more first electric push rods 95 drive one or more sets of differential bevel gears 94 to move upwards and disengage from the meshing part of the double-sided bevel gear 93 to the initial position, in preparation for the injection molding operation of the next batch of injection molded products.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An injection mold for processing plastic products, characterized in that: Includes steps (1), the three sets of steps (1) are fixed with a base frame (2), and a vertical frame (3) is arranged vertically in a triangular equidistant shape on the base frame (2), and a material cylinder (4) through which three hoppers (5) are arranged vertically on the vertical frame (3), and an upper mold (6) is fixed on the outside of the vertical frame (3), and a lower mold (7) is provided below the upper mold (6) to cooperate with it in mold closing; And a box (8) fixed on both sides of the lower mold (7), and a switching component for opening and closing the upper mold (6) and the lower mold (7) is provided on the inner side of the three sets of vertical frames (3). The switching component includes a double-head motor (91) embedded in the middle of the base frame (2), and a drive bevel gear (92) is fixed on one output shaft of the double-head motor (91). A limiting component for clamping the upper mold (6) and the lower mold (7) after closing is provided in the box (8). The limiting component includes toothed columns (101) fixed on both sides of the upper mold (6). The barrel (4) is provided with an extrusion assembly for spiral feeding of injection molding materials. The extrusion assembly includes a second electric push rod (111) fixed on another output shaft of the double-head motor (91). The barrel (4) is provided with feeding assemblies for feeding the upper mold (6) and the lower mold (7) at the three feeding ports. The feeding assemblies include feeding heads (121) connected to the outer ends of the three feeding ports.

2. The injection mold based on plastic product processing as described in claim 1, characterized in that: The switching assembly also includes a double-sided bevel gear (93) meshing with the bottom of the drive bevel gear (92), and a differential bevel gear (94) is provided on the outside of the double-sided bevel gear (93). A first electric push rod (95) is fixed on the differential bevel gear (94) and is used to adjust the meshing stroke of the differential bevel gear (94) and the double-sided bevel gear (93).

3. The injection mold based on plastic product processing as described in claim 2, characterized in that: The piston rod of the first electric push rod (95) is fixed with a lead screw (96) and rotates with the vertical frame (3). A threaded sleeve (97) is threaded on the lead screw (96) and fixed to the lower mold (7) through a connector on the outside of the threaded sleeve (97). A vertical sliding groove (14) is opened on the outside of the vertical frame (3) and slides with the connector. A guide plate (16) is fixed on the inside of the lower mold (7) and slides with the reserved guide groove (15) on the base frame (2).

4. The injection mold based on plastic product processing as described in claim 3, characterized in that: The limiting component also includes a limiting sleeve (102) fixed inside the box (8) and slidingly engaged with the toothed column (101), and a sprocket (103) meshing with one side of the tooth groove of the toothed column (101), and a ratchet (104) sleeved on the inner side of the sprocket (103) through a rotating rod.

5. The injection mold based on plastic product processing as described in claim 4, characterized in that: The ratchet (104) is engaged with a pawl (105) on its outer side, and a compression spring (106) is fixedly fitted to the outer side of the pawl (105) in a fixed cooperation with the box body (8). A lever (107) is fixedly fitted to the outer side of the pawl (105) in a rotational cooperation with the box body (8), and an anti-slip sleeve is fitted on the outer side of the lever (107).

6. The injection mold based on plastic product processing as described in claim 5, characterized in that: The extrusion assembly also includes a locking head (112) fixed on the piston rod of the second electric push rod (111), and a locking seat (113) is provided above the locking head (112). A spiral extrusion frame (114) that rotates with the material cylinder (4) is fixed on the locking seat (113) and adopts a hollow design.

7. The injection mold based on plastic product processing as described in claim 6, characterized in that: The top of the spiral extruder (114) is equipped with a sealed bearing (115), and the top of the cylinder (4) is fixed with a heater (116). A heating rod (117) is provided at the bottom of the heater (116) and sleeved with the sealed bearing (115). The heating rod (117) extends to the bottom of the spiral extruder (114), and the outer side of the cylinder (4) is covered with a heat insulation sleeve (17).

8. The injection mold based on plastic product processing as described in claim 7, characterized in that: The feeding assembly also includes a feeding pipe (123) connected to the outer end of the feeding head (121), and adopts a quantitative valve (122) for quantitative feeding design. The end of the feeding pipe (123) is connected to a main pipe rack (124), and the bottom end of the main pipe rack (124) is connected to a main material head (125) connected to the channel of the upper mold (6).

9. The injection mold based on plastic product processing as described in claim 8, characterized in that: The main tube frame (124) is connected to the manifold frame (126) at both ends, and the inner end of the manifold frame (126) is arrayed with auxiliary nozzles (127) that communicate and cooperate with the upper mold (6). A buffer pad (18) is provided on the outer side of the upper mold (6) near the main material head (125), and a vibration motor (19) is fixed around the buffer pad (18).

10. The injection mold based on plastic product processing as described in claim 9, characterized in that: The three sets of upper molds (6) are provided with mold cavities (20) on all four limbs, and the three sets of lower molds (7) are provided with mold heads (21) that are matched with the mold cavities (20). A flow channel groove for feeding materials to the main material head (125) and the auxiliary nozzle (127) is reserved on the side of the upper mold (6) near the mold cavity (20).

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