Pre-pressing device for molding products

Abstract

The present invention discloses a pre-pressing molding device for molded products. The present invention relates to the field of molding technology, including a frame: a mold mechanism, which is used for pre-pressing the molded product. The mold mechanism has a hydraulic cylinder for extruding the molding material, the hydraulic cylinder is used to provide hydraulic power, and a hydraulic lifting column installed around the mold mechanism, the bottom of the hydraulic lifting column penetrates the frame and is exposed from the bottom of the frame, and the lifting column is installed at the four corners of the frame. The pre-pressing molding device for molded products can prevent the molding residue in the previous molding operation step from affecting the molding quality of the molding material to be performed, facilitate the overall maintenance and cleaning of the mold mechanism, eliminate the cleaning dead corner, realize the quick and fast disassembly and assembly of the lower mold by the quick-change fixture, make mold replacement more convenient, reduce downtime, and improve production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of molding, in particular to a pre-pressing molding device for molding products. Background Art

[0002] Molded products are widely used in various industrial fields, such as automobile manufacturing, household appliances, electronic products, building materials and packaging. The quality of these products directly affects the performance and market competitiveness of the final product. In the manufacturing process of molded products, pre-pressing is a crucial link. The main purpose of pre-pressing is to initially compact the molding material, eliminate bubbles and voids inside the material, improve the density and uniformity of the material, and thus provide a stable foundation for the subsequent precision molding process.

[0003] However, in the pressing process of traditional equipment, the molds are mostly combined structures assembled from top to bottom, and cannot be further differentiated. There are still molding residues. The overall disassembly, maintenance and cleaning of the mold mechanism will consume a lot of time and manpower; it is impossible to provide a clean and tidy mold cavity environment for the urgent molding and die-casting, and the quality of the molded products cannot be guaranteed. The loading and unloading process of the mold structure of the existing equipment is particularly complicated, and it is difficult to ensure efficient assembly and convenient use. Summary of the invention

[0004] In order to solve the above technical problems, the present invention is implemented through the following technical solutions: A pre-pressing molding device for molded products, including a frame for supporting the entire device to ensure the stability of the device:

[0005] A mold mechanism, used for pre-pressing molded products, the mold mechanism has a hydraulic cylinder for extruding molding materials, the hydraulic cylinder is used to provide hydraulic power, and a hydraulic lifting column installed around the mold mechanism, the bottom of the hydraulic lifting column passes through the frame and is exposed from the bottom of the frame, the hydraulic lifting column is installed at the four corners of the frame, a rectangular window is opened in the middle of the top of the frame, the mold mechanism is installed in the middle of the rectangular window, a top plate is installed parallel to the top of the frame, the top plate is installed with the frame through the hydraulic lifting column, the hydraulic cylinder bolt is installed in the middle of the top of the top plate, the top of the top plate is centrally symmetrically installed with an injection valve pipe for transmitting molding materials into the mold cavity, the output end of the hydraulic cylinder is an extended rod-shaped structure, and a built-in telescopic rod is installed in the middle of the rod-shaped structure;

[0006] A cooling mechanism is used to cool the mold mechanism. The cooling mechanism has a cross air guide frame supported at the bottom of the mold mechanism, and a cooling air duct installed in the middle of the top of the cooling mechanism. A semiconductor cooling sheet and a fan are installed inside the cooling air duct to dissipate heat and cool the bottom of the mold mechanism while blowing hot air to the surroundings;

[0007] The mold mechanism includes an upper mold and a lower mold, and the mold cavity shapes and sizes of the upper mold and the lower mold match the design requirements of the molded product to ensure the precise molding of the product; the upper mold is sealed and clamped on the top of the lower mold, and the lower mold has the same structure as the upper mold. Both are assembled from a pair of mold enclosure plate units, and the pair of mold enclosure plate units are sealed and inserted in a left-right symmetrical shape. A hydraulic push rod is installed in the middle of one side of the mold enclosure plate unit close to the hydraulic lifting column;

[0008] The back surfaces of the upper mold and the lower mold are respectively equipped with a top mold base and a bottom mold base, and the bottom mold base is fitted on the bottom of the lower mold, and the bottom mold base is fixedly installed in the middle of the rectangular window of the frame through a cooling air duct and a cross air guide frame, and the top mold base is fitted on the top of the upper mold, and the top mold base and the upper mold are surrounded by quick-change clamps and torsion clamps, and the torsion clamps are rotatably connected to the left and right ends of the quick-change clamps in a left-right symmetrical state, and a structure composed of a quick-change clamp and a pair of torsion clamps is symmetrically installed on the upper mold and the lower mold.

[0009] Preferably, a spring tongue rod is installed inside the bottom mold base, and the spring tongue rod is elastically and telescopically connected to the bottom mold base, and a guide cavity opening is opened on one side of the bottom mold base facing the top mold base and is symmetrically connected to the top mold base. The top of the bottom mold base forms a rectangular protrusion structure in the middle of its top end through the opening of the guide cavity opening, and the protrusion structure is relatively blocked by the bottom of the mold cavity of the lower mold. The mold enclosure plate unit is fixedly connected with a protruding frame edge in the middle of the edge facing the quick-change fixture, and the mold enclosure plate unit is slidably installed with the bottom mold base through the cooperation of the protruding frame edge and the guide cavity opening, and the mold enclosure plate unit is sealed and installed with the bottom mold base through the cooperation of the protruding frame edge and the rectangular protrusion structure on the top of the bottom mold base, and is also used for the corresponding installation of the lower mold directly below the upper mold, to help the corresponding installation of the lower mold and the upper mold.

[0010] Preferably, a core plate is installed on the top inner side of the mold cavity of the upper mold, the output end of the hydraulic cylinder is clamped with the top mold base, the built-in telescopic rod is connected to the middle thread of the top of the core plate, the core plate is installed and lifted with the upper mold through the built-in telescopic rod, the upper mold is installed and lifted with the lower mold through the top mold base and the hydraulic cylinder, the output end of the injection valve tube passes through the top mold base and the core plate in sequence and is connected with the mold cavity of the upper mold, and the output end of the injection valve tube is a telescopic tube structure.

[0011] Preferably, a double-ring cover is installed at one end of the hydraulic push rod close to the mold plate unit, and the double-ring cover flange is installed in the middle of the mold plate unit, the output end of the hydraulic push rod is connected to a push plug, and a rubber ring is installed at one end of the push plug close to the double-ring cover, and the rubber ring is sleeved on the output end of the hydraulic push rod, and a pressurized hole is opened at the position where the output end of the hydraulic push rod and the mold plate unit are inserted, and the push plug is telescopically moved in the pressurized hole of the mold plate unit through the hydraulic push rod, and a hoop sleeve is fixedly connected to the pressurized hole opened in the middle of the mold plate unit, and the hoop sleeve is used for sealing and limiting the output end of the hydraulic push rod, as well as horizontally guiding, and two one-way air valves are centrally symmetrically installed on the double-ring cover, and the input end of the one-way air valve passes through the double-ring cover and the hoop sleeve in sequence and is connected to the pressurized hole.

[0012] Preferably, the quick-change clamp includes a first thick clamping plate, which is clamped and installed around the two side plates of the mold enclosure unit and the quick-change clamp. A first connecting plate is installed on the top of the first thick clamping plate, and a long plate is installed on the bottom of the first thick clamping plate. A first electric push rod is embedded in the inside of the first thick clamping plate, and the first connecting plate is lifted and lowered together with the first thick clamping plate by a long screw.

[0013] Preferably, a long screw is threadedly installed on the first connecting plate, the spring tongue rod corresponds to the long screw one-to-one, a second electric push rod is installed on the top of the long plate, and the second electric push rod is installed in an embedded manner with the bottom mold base, the long plate is lifted and installed with the bottom mold base through the second electric push rod, long guide pins are staggeredly installed on the top of the long plate and the second electric push rod, the long guide pins correspond to the long screw one-to-one, and holes are provided on the side plates of the mold enclosure plate unit and the sides of the bottom mold base corresponding to the long screws. Through the setting of the holes, the long screws can be conveniently inserted into the bottom of the bottom mold base through the holes, so that the mold enclosure plate unit and the bottom mold base can be locked and installed conveniently.

[0014] Preferably, a locking hole is provided on the surface of the long screw, and a locking tongue is limitedly installed inside the locking hole, and the locking tongue is telescopically installed with the long screw through the locking hole, and a guide tongue cavity is provided on the surface of the long guide pin and on a side close to the first electric push rod, and the guide tongue cavity is used to lift and accommodate the locking tongue, and the elastic tongue rod pushes against the lock tongue through the locking hole and locks the long screw in the bottom mold base; the end of the long guide pin close to the lock tongue is a curved guiding structure, which is used to guide the lock tongue into the guide tongue cavity for lifting and guiding during the insertion of the long guide pin into the long screw, and use the lifted lock tongue to push out the elastic tongue rod inserted in the lock hole, so that the long screw can be withdrawn from the bottom mold base under the action of the long guide pin continuing to extend and push, and the mold enclosure unit is locked and installed with the bottom mold base through the cooperation of the long screw and the elastic tongue rod.

[0015] Preferably, the torsion clamp includes a second thick splint, a second connecting plate is installed on the top of the second thick splint, a short plate is installed on the bottom of the second connecting plate, the second thick splint has the same structure as the first thick splint, and the two are hinged; the second connecting plate has the same structure as the first connecting plate, and the two are hinged; the long plate and the short plate have the same structure, and the two are hinged.

[0016] Preferably, the second thick clamping plate and the first thick clamping plate are both provided with inner cavities in the middle of one side facing the mold enclosure plate unit, and the first thick clamping plate fits and clamps the side plate and the bottom mold base of the mold enclosure plate unit together through the inner cavity.

[0017] Preferably, a DD motor is embedded and installed at one end of the first thick splint close to the second thick splint, and a long axle pin is installed at the hinged part between the first thick splint and the second thick splint. The DD motor is meshed and transmitted with the gear assembly on the long axle pin through its output end, and the second thick splint is rotatably installed with the first thick splint through the cooperation of the DD motor and the long axle pin.

[0018] The present invention provides a pre-pressing molding device for molded products, which has the following beneficial effects:

[0019] 1. The pre-compression molding equipment of the molded product can separate the upper mold from the lower mold by the jacking effect of the hydraulic lifting column before using the mold mechanism, so as to expose the mold cavities of the two, and facilitate the inspection, cleaning and maintenance of the internal mold cavity. It can prevent the molding residue in the previous compression molding operation step from affecting the molding quality of the molding material to be performed, and can automatically open the inside of the mold cavity, which is convenient for maintenance personnel to check and clean in time, thereby ensuring the compression molding quality of the molded product.

[0020] 2. The pre-compression molding equipment of the molded product can provide two injection ports for the mold mechanism by installing the injection valve tube on the top of the top plate, and can also protect and isolate the injection valve tube outside the mold mechanism separately, so as to ensure that the molding material is continuously injected into the mold mechanism without affecting the closing and separation between the upper mold and the lower mold, and will not affect the disassembly and replacement between the upper mold and the lower mold.

[0021] 3. The pre-compression molding equipment of the molded product has a structural design in which the upper mold and the lower mold are assembled by a pair of mold plate units, so that the entire mold mechanism is not only roughly divided into two modules, the upper mold and the lower mold, but also further divided into: four mold plate units that can be sealed and assembled with each other; these four mold plate units can not only be sealed and assembled under the limit locking clamping installation of the quick-change clamp and the torsion clamp, but can also be conveniently disassembled into an identical structural component in the subsequent shutdown maintenance operation, and the interior of the mold cavity is exposed to facilitate the overall maintenance and cleaning of the mold mechanism, and can easily clean molding residues, eliminate cleaning dead corners, and realize the convenient cleaning function of the mold mechanism. The simple and easy-to-disassemble structural design not only extends the effective use period of the mold mechanism, but also ensures the quality of the product compression molded by the mold mechanism, and has a significant promoting effect on the uniform compaction of the molding material and the improvement of the density and quality of the product.

[0022] Fourth, the pre-compression molding equipment of the molded product can avoid the complicated operation of traditional multi-thread twisting installation. There is no need to perform long-term thread twisting installation operation when positioning and installing the lower mold on the bottom mold base. The mold can be quickly positioned and installed on the bottom mold base through the automatic locking of the spring tongue rod and the long screw. In addition, the lower mold can be sealed and installed on the bottom mold base with the cooperation of the raised frame edge and the rectangular raised structure in the middle of the bottom mold base. While simplifying the mold positioning and installation process, it realizes the automation of the mold installation process, saves mold installation time, and improves the compression molding efficiency.

[0023] 5. The pre-pressing molding device of the molded product drives the long guide pin to be inserted into the long screw rod by activating the contraction of the second electric push rod, guides the lock tongue to be received in the guide tongue cavity, and uses the lock tongue to push out the long guide pin locked in the lock hole by the bolt, unlocks the long screw rod, and then continues to push the long screw rod through the long guide pin. At the same time, the first electric push rod is activated to extend, and the long screw rod is actively pushed out from the hole of the bottom mold base until the long screw rod is withdrawn from the hole on the side plate of the mold enclosure plate unit, thereby releasing the lock of the side plate of the mold enclosure plate unit on the bottom mold base. The quick-change fixture can realize the self-disassembly function of the lower mold by the quick-change fixture. Similarly, the upper mold can also be quickly disassembled from the top mold base. Therefore, the quick disassembly function of the upper and lower molds can be realized through the quick-change fixture, making mold replacement more convenient, reducing downtime, and improving production efficiency. It can quickly replace and load molds with different cavities while ensuring that the outer contour structure of the mold remains unchanged, making the compression molding function of the molding equipment diversified, and the working conditions that can be met are no longer single and unchanging. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the external structure of a pre-pressing molding device for a molded product of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the cooling mechanism on the bottom of the rack of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the mold mechanism of the present invention;

[0027] Figure 4 It is a schematic diagram of the disassembled structure of the mold enclosure plate unit and the guide cavity opening of the present invention;

[0028] Figure 5 It is a schematic diagram of the partial assembly structure of the core plate and the mold enclosure plate unit of the present invention;

[0029] Figure 6 It is a schematic diagram of the partial assembly structure of the hydraulic push rod and the mold enclosure plate unit of the present invention;

[0030] Figure 7 It is a schematic diagram of the partial assembly structure of the mold enclosure plate unit of the present invention with the bottom mold base through the quick-change clamp and the torsion clamp;

[0031] Figure 8 It is a schematic diagram of the disassembled structure of the quick-change clamp and the torsion clamp of the present invention;

[0032] Fig. 9 It is a schematic diagram of the disassembled structure of the long board and the first thick plywood of the present invention;

[0033] Fig.10 It is a schematic diagram of the partial assembly structure of the torsion clamp and the mold enclosure plate unit of the present invention;

[0034] Fig.11 It is a schematic diagram of the partial assembly structure of the first electric push rod and the long guide pin of the present invention;

[0035] Fig.12 It is a schematic diagram of the insertion structure of the first electric push rod of the present invention through the locking tongue and the bottom mold base.

[0036] In the figure: 1, frame; 2, mold mechanism; 3, hydraulic cylinder; 31, built-in telescopic rod; 4, hydraulic lifting column; 5, cooling mechanism; 6, injection valve tube; 7, top plate; 8, cooling air duct; 21, upper mold; 22, lower mold; 23, mold enclosure unit; 24, hydraulic push rod; 25, top mold base; 26, quick-change fixture; 27, twisting fixture; 28, bottom mold base; 281, tongue rod; 29, guide cavity; 210, raised frame edge; 211, core plate; 241, double ring cover ; 242, push plug; 243, rubber ring; 244, hoop; 245, one-way air valve; 261, first thick splint; 262, first connecting plate; 263, long plate; 264, first electric push rod; 641, lock hole; 642, lock tongue; 265, long screw; 267, second electric push rod; 268, long guide pin; 681, guide tongue cavity; 269, DD motor; 212, long shaft pin; 271, second thick splint; 272, second connecting plate; 273, short plate; 274, inner cavity. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0038] The first embodiment, as Figures 1 to 12 As shown, the present invention provides a technical solution: a pre-pressing molding device for molded products, comprising a frame 1:

[0039] The mold mechanism 2 is used for compression molding of molded products. The mold mechanism 2 has a hydraulic cylinder 3 for extruding molding materials, and a hydraulic lifting column 4 installed around the mold mechanism 2. The bottom of the hydraulic lifting column 4 penetrates the frame 1 and is exposed from the bottom of the frame 1. The hydraulic lifting column 4 is installed at the four corners of the frame 1. A rectangular window is opened in the middle of the top of the frame 1. The mold mechanism 2 is installed in the middle of the rectangular window. A top plate 7 is installed parallel to the top of the frame 1. The top plate 7 is lifted and installed with the frame 1 through the hydraulic lifting column 4. The hydraulic cylinder 3 is bolted in the middle of the top of the top plate 7. The top of the top plate 7 is centrally symmetrically installed with an injection valve tube 6. The output end of the hydraulic cylinder 3 is an extended rod-shaped structure. A built-in telescopic rod 31 is installed in the middle of the rod-shaped structure.

[0040] The cooling mechanism 5 is used to cool the mold mechanism 2. The cooling mechanism 5 has a cross air guide frame supported at the bottom of the mold mechanism 2, and a cooling air cylinder 8 installed in the middle of the top of the cooling mechanism 5. The cooling air cylinder 8 is equipped with a semiconductor cooling sheet and a fan to dissipate heat and cool the bottom of the mold mechanism 2 while blowing hot air to the surroundings;

[0041] The mold mechanism 2 includes an upper mold 21 and a lower mold 22. The upper mold 21 is sealed and clamped on the top of the lower mold 22. The lower mold 22 has the same structure as the upper mold 21. Both are assembled by a pair of mold enclosure plate units 23. The pair of mold enclosure plate units 23 are sealed and inserted in a left-right symmetrical shape. A hydraulic push rod 24 is installed in the middle of one side of the mold enclosure plate unit 23 close to the hydraulic lifting column 4.

[0042] A top mold base 25 and a bottom mold base 28 are respectively installed on the back surfaces of the upper mold 21 and the lower mold 22, and the bottom mold base 28 is fitted on the bottom of the lower mold 22, and the bottom mold base 28 is fixedly installed in the middle of the rectangular window of the frame 1 through the refrigeration air duct 8 and the cross air guide frame. The top mold base 25 is fitted on the top of the upper mold 21, and the top mold base 25 and the upper mold 21 and the lower mold 22 and the bottom mold base 28 are surrounded by quick-change clamps 26 and torsion clamps 27. The torsion clamp 27 is rotatably connected to the left and right ends of the quick-change clamp 26 in a left-right symmetrical shape, and the structure composed of a quick-change clamp 26 and a pair of torsion clamps 27 is installed on the upper mold 21 and the lower mold 22 in a front-back symmetrical shape.

[0043] A spring tongue rod 281 is installed inside the bottom mold base 28, and the spring tongue rod 281 is elastically and telescopically connected to the bottom mold base 28. The bottom mold base 28 is symmetrically connected to the top mold base 25 and is provided with a guide cavity opening 29. The top of the bottom mold base 28 forms a rectangular protrusion structure in the middle of its top through the opening of the guide cavity opening 29. The protrusion structure is relatively blocked by the bottom of the mold cavity of the lower mold 22. The mold enclosure plate unit 23 is fixedly connected with a protruding frame edge 210 in the middle of the edge facing the quick-change fixture 26. The mold enclosure plate unit 23 is slidably installed with the bottom mold base 28 through the protruding frame edge 210 and the guide cavity opening 29, and the mold enclosure plate unit 23 is sealed and installed with the bottom mold base 28 through the protruding frame edge 210 and the rectangular protrusion structure on the top of the bottom mold base 28.

[0044] A core plate 211 is installed on the top inner side of the mold cavity of the upper mold 21, the output end of the hydraulic cylinder 3 is clamped with the top mold base 25, the built-in telescopic rod 31 is connected to the top middle thread of the core plate 211, the core plate 211 is installed and lifted with the upper mold 21 through the built-in telescopic rod 31, the upper mold 21 is installed and lifted with the lower mold 22 through the top mold base 25 and the hydraulic cylinder 3, the output end of the injection valve tube 6 passes through the top mold base 25 and the core plate 211 in sequence and is connected with the mold cavity of the upper mold 21, and the output end of the injection valve tube 6 is a telescopic tube structure.

[0045] The quick-change clamp 26 includes a first thick clamp 261, which is clamped and installed around the two side plates of the mold enclosure unit 23 and the quick-change clamp 26. A first connecting plate 262 is installed on the top of the first thick clamp 261, and a long plate 263 is installed on the bottom of the first thick clamp 261. A first electric push rod 264 is embedded in the inside of the first thick clamp 261, and the first connecting plate 262 is lifted and lowered together with the first thick clamp 261 through a long screw 265.

[0046] A long screw 265 is threadedly installed on the first connecting plate 262, and the tongue rod 281 corresponds to the long screw 265 one by one. A second electric push rod 267 is installed on the top of the long plate 263, and the second electric push rod 267 is installed in an interlocking manner with the bottom mold base 28. The long plate 263 is lifted and installed with the bottom mold base 28 through the second electric push rod 267. Long guide pins 268 are staggeredly installed on the top of the long plate 263 and the second electric push rod 267, and the long guide pins 268 correspond to the long screw 265 one by one. Holes are provided on the side plates of the mold enclosure plate unit 23 and the sides of the bottom mold base 28 corresponding to the long screw 265. Through the setting of the holes, the long screw 265 can be conveniently inserted into the bottom of the bottom mold base 28 through the holes, so that the mold enclosure plate unit 23 and the bottom mold base 28 can be locked and installed conveniently.

[0047] The surface of the long screw 265 is provided with a locking hole 641, and a locking tongue 642 is installed in the locking hole 641. The locking tongue 642 is telescopically installed with the long screw 265 through the locking hole 641. A guide tongue cavity 681 is provided on the surface of the long guide pin 268 and on a side close to the first electric push rod 264. The guide tongue cavity 681 is used to lift and store the locking tongue 642. The spring tongue rod 281 pushes against the locking tongue 642 through the locking hole 641 and locks the long screw 265 in the bottom mold base 28. One end of the long guide pin 268 close to the locking tongue 642 The curved guiding structure is used to guide the locking tongue 642 into the guide tongue cavity 681 for lifting and guiding during the insertion of the long guide pin 268 into the long screw rod 265, and utilize the lifted locking tongue 642 to push out the spring tongue rod 281 inserted in the locking hole 641, so that the long screw rod 265 can be withdrawn from the bottom mold base 28 under the action of the pushing force of the long guide pin 268, and the mold enclosure unit 23 is locked and installed with the bottom mold base 28 through the cooperation of the long screw rod 265 and the spring tongue rod 281.

[0048] A DD motor 269 is embedded and installed at one end of the first thick splint 261 close to the second thick splint 271, and a long shaft pin 212 is installed at the hinged part between the first thick splint 261 and the second thick splint 271. The DD motor 269 is meshed with the gear assembly on the long shaft pin 212 for transmission through its output end, and the second thick splint 271 is rotatably installed with the first thick splint 261 through the cooperation of the DD motor 269 and the long shaft pin 212.

[0049] When in use, a certain amount of molding material is delivered into the mold cavity between the sealed and closed upper mold 21 and the lower mold 22 through the injection valve tube 6, and the upper mold 21 is pressed onto the lower mold 22 through the rod-shaped output end structure extended by the hydraulic cylinder 3, and then the built-in telescopic rod 31 is activated to drive the core plate 211 to be pressed down, and the molding material is compression-molded by the core plate 211. During the molding of the molding material, the refrigeration air duct 8 belonging to the cooling mechanism 5 is activated to dissipate heat and cool the molding material at the bottom of the mold mechanism 2, accelerate the diffusion and guidance of the hot air flow to the surroundings, realize auxiliary cooling of the mold mechanism 2, and accelerate the rapid molding of the molded product.

[0050] During use, through the setting of the hydraulic lifting column 4, before using the mold mechanism 2, the upper mold 21 and the lower mold 22 can be separated by the lifting effect of the hydraulic lifting column 4 to expose the mold cavities of the two, so as to facilitate the inspection, cleaning and maintenance of the internal mold cavity, prevent the molding material residue generated in the previous pre-compression molding operation step from affecting the molding quality of the molding material to be carried out, and can automatically open the interior of the mold cavity, which is convenient for maintenance personnel to check and clean in time, thereby ensuring the compression molding quality of the molded products.

[0051] The upper mold 21 and the lower mold 22 can also be separated by the lifting effect of the hydraulic lifting column 4, which provides convenience for subsequent disassembly and replacement of new molds and avoids the risk of scratching the mold structure surface during disassembly or cleaning of the mold.

[0052] By installing the injection valve tube 6 on the top of the top plate 7, two injection ports are provided for the mold mechanism 2, and the injection valve tube 6 can be separately protected and isolated outside the mold mechanism 2, ensuring that the molding material is continuously injected into the mold mechanism 2 without affecting the closing and separation between the upper mold 21 and the lower mold 22, and will not affect the disassembly and replacement between the upper mold 21 and the lower mold 22.

[0053] Through the structural design that the upper mold 21 and the lower mold 22 are both assembled by a pair of mold plate units 23, the entire mold mechanism 2 is not only roughly divided into two modules, the upper mold 21 and the lower mold 22, but is further divided into: four mold plate units 23 that can be sealed and assembled with each other; these four mold plate units 23 can not only be sealed and assembled under the limit locking clamping installation of the quick-change clamp 26 and the torsion clamp 27, but can also be conveniently disassembled into an identical structural component during subsequent shutdown maintenance operations, and the interior of the mold cavity is exposed to facilitate the overall maintenance and cleaning of the mold mechanism 2, and can easily clean molding residues, eliminate cleaning dead corners, and realize the convenient cleaning function of the mold mechanism 2. The simple and easy-to-disassemble structural design not only extends the effective use period of the mold mechanism 2, but also ensures the quality of the product compression molded by the mold mechanism 2, and significantly promotes the uniform compaction of the molding material and the improvement of the density and quality of the product.

[0054] The structural operation principle of assembling the upper mold 21 onto the top mold base 25 is the same as that of assembling the lower mold 22 onto the bottom mold base 28. The assembly of the lower mold 22 onto the bottom mold base 28 is taken as an example:

[0055] Before using the molding equipment, the bottom plane of the lower mold 22 where the raised frame edge 210 is located is level with the plane where the guide cavity opening 29 is located, and then they are symmetrical. Under the guidance of the guide cavity opening 29, the raised frame edge 210 is translated and closed at the top of the bottom mold base 28, so that the holes on the side plates of the mold plate unit 23 correspond to the holes on the bottom mold base 28. During this period, the thickness of the side plates of the mold plate unit 23 constituting the lower mold 22 and the thickness of the bottom mold base 28 are added to the height of the inner cavity 274, that is, the side plates of the mold plate unit 23 are on the bottom mold base 28, guided along the long side edges of the bottom mold base 28, and the limit card is installed in the inner cavity 274, and gradually approach and splice to the center in the inner cavity 274;

[0056] Then, the first electric push rod 264 is activated to drive the long screw 265 to correspond to the hole structure of the mold enclosure plate unit 23, and vertically descend to be inserted into the hole on the bottom mold base 28. At this time, the first connecting plate 262 is driven by the retraction and descent of the output end of the first electric push rod 264 to fit with the top of the first thick clamping plate 261; and during the insertion of the long screw 265 into the hole on the bottom mold base 28, the tongue rod 281 is blocked and stored by the guide tongue cavity 681 opened on the surface of the long guide pin 268. As the long screw 265 continues to extend into the hole of the bottom mold base 28, the long guide pin 268 can be used to press the long tongue rod 281 into the hole of the bottom mold base 28. Under the plug-in guiding action of the screw 265, the long screw 265 pushes the spring tongue rod 281 back into the bottom mold base 28, and then as the long screw 265 continues to extend, the spring tongue rod 281 itself is elastically pushed inside the bottom mold base 28 and correspondingly inserted into the locking hole 641. The spring tongue rod 281 is locked inside the locking hole 641 to lock the lower mold 22 as a whole on the bottom mold base 28, thereby realizing the automatic locking installation of the lower mold 22 on the bottom mold base 28. Similarly, the locking assembly of the upper mold 21 on the top mold base 25 can be realized.

[0057] Through the above operation, the complicated operation of traditional multi-thread twisting installation can be avoided, and there is no need to perform long-term thread twisting installation operation when positioning and installing the lower mold 22 on the bottom mold base 28. The mold can be quickly positioned and installed on the bottom mold base 28 through the automatic locking of the tongue rod 281 and the long screw 265. In addition, the lower mold 22 can be sealed and installed on the bottom mold base 28 with the cooperation of the raised frame edge 210 and the rectangular raised structure in the middle of the bottom mold base 28. While simplifying the mold positioning and installation process, the mold installation process is automated, saving mold installation time and improving compression molding efficiency.

[0058] Similarly, when the equipment stops using, the second electric push rod 267 can be activated to retract, driving the long guide pin 268 to be inserted into the long screw 265, guiding the lock tongue 642 to be stored in the guide tongue cavity 681, and using the lock tongue 642 to push out the long guide pin 268 locked in the lock hole 641 by the latch, unlocking the long screw 265, and then continuing to push the long screw 265 through the long guide pin 268. At the same time, the first electric push rod 264 is activated to extend, actively pushing the long screw 265 out of the hole in the bottom mold base 28 until the long screw 265 withdraws from the hole on the side plate of the mold enclosure plate unit 23, thereby releasing the mold. The locking state of the side plate of the enclosure unit 23 on the bottom mold base 28 enables the quick disassembly function of the quick-change fixture 26 on the lower mold 22, and similarly, the quick disassembly of the upper mold 21 on the top mold base 25 can also be realized. Thus, the quick disassembly and assembly function of the upper mold 21 and the lower mold 22 is realized by the quick-change fixture 26, making mold replacement more convenient, reducing downtime, and improving production efficiency. It can quickly replace and load and unload molds with different cavities while ensuring that the outer contour structure of the mold remains unchanged, making the compression molding function of the molding equipment diversified and being able to meet the use conditions that are no longer single and unchanging.

[0059] The second embodiment is based on the first embodiment. Figures 3 to 7 As shown, a double ring cover 241 is installed at one end of the hydraulic push rod 24 close to the die plate unit 23, and the double ring cover 241 is flange-mounted in the middle of the die plate unit 23. A push plug 242 is connected to the output end of the hydraulic push rod 24. A rubber ring 243 is installed at one end of the push plug 242 close to the double ring cover 241, and the rubber ring 243 is sleeved on the output end of the hydraulic push rod 24. A pressurized hole is provided at the position where the output end of the hydraulic push rod 24 and the die plate unit 23 are inserted. The plug 242 is telescopically movable in the pressurized hole of the mold plate unit 23 through the hydraulic push rod 24. A hoop 244 is fixedly connected to the pressurized hole opened in the middle of the mold plate unit 23. The hoop 244 is used to seal and limit the output end of the hydraulic push rod 24, as well as to guide it horizontally. Two one-way air valves 245 are centrally symmetrically installed on the double ring cover 241, and the input end of the one-way air valve 245 passes through the double ring cover 241 and the hoop 244 in sequence and is connected to the pressurized hole.

[0060] When in use, the design of the hydraulic push rod 24 can be used in conjunction with the core plate 211 during compression molding of the molding material in the mold cavity: by activating the hydraulic push rod 24, after the core plate 211 passes through the hydraulic push rod 24 structure in the middle of the upper mold 21, the push plug 242 is pushed into the pressurized hole by high pressure to assist in pressurizing the core plate 211 in the upper space between the core plate 211 and the top mold base 25, and the space between the upper mold 21, the core plate 211 and the top mold base 25 is pressurized. In this way, the pressure is evenly distributed on the top of the core plate 211, so as to balance the compression force of the core plate 211 on the molding material, thereby ensuring the stable pressure of the core plate 211 for molding, and ensuring the density and quality of the molding material.

[0061] When the push plug 242 retracts in the pressurized hole, the rubber ring 243 can follow the retraction of the push plug 242 to discharge the remaining air in the pressurized hole out of the mold cavity through the one-way air valve 245, so as to avoid the accidental introduction of air when the mold cavity is pressurized, avoid the interference of air on the molding density and quality, and ensure the density and quality of the molding material.

[0062] The third embodiment is based on the first and second embodiments. Figures 7 to 11 As shown, the torsion clamp 27 includes a second thick splint 271, a second connecting plate 272 is installed on the top of the second thick splint 271, and a short plate 273 is installed on the bottom of the second connecting plate 272. The second thick splint 271 has the same structure as the first thick splint 261, and the two are hinged; the second connecting plate 272 has the same structure as the first connecting plate 262, and the two are hinged; the long plate 263 has the same structure as the short plate 273, and the two are hinged.

[0063] The second thick clamping plate 271 and the first thick clamping plate 261 both have inner cavities 274 in the middle of one side facing the mold enclosure plate unit 23 . The first thick clamping plate 261 fits and clamps the side plate of the mold enclosure plate unit 23 and the bottom mold base 28 together through the inner cavity 274 .

[0064] When in use, the structural design of the torsion clamp 27 is the same as that of the quick-change clamp 26, and the various mechanisms on the torsion clamp 27 are hinged with the corresponding structures on the quick-change clamp 26, so that the torsion clamp 27 can be located at the narrow end of the wide edge of the quick-change clamp 26 and rotate, and the DD motor 269 can be activated in combination with the meshing transmission of the gear assembly and the long shaft pin 212 to actively control the right-angle rotation adjustment of the torsion clamp 27 at the left and right ends of the quick-change clamp 26, which can expand the limiting locking area of ​​the quick-change clamp 26 on the side plate of the mold enclosure plate unit 23, and effectively utilize the torsion clamp 27 and the structures on the quick-change clamp 26. Working together, the torsion clamp 27 is used to seal and limit the wide side plate part of the mold enclosure unit 23 and lock it on the bottom mold base 28, so that the sealing installation performance of the lower mold 22 on the bottom mold base 28 and the sealing installation performance of the upper mold 21 on the top mold base 25 can be guaranteed, and no sealing installation dead angle will be generated. It can ensure the rapid loading and unloading function of the mold structure on the mold base structure while meeting the sealing performance of the assembly between the mold structure and the mold base structure, and can ensure the smooth molding operation of the molded product. It can be seen that the overall design of the molding equipment is compact, the structure has good flexible adjustment performance, and it is easy to install and maintain.

[0065] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A pre-pressing device for molded products, comprising a frame (1), characterized in that: A mold mechanism (2) for pre-pressing a molded product, the mold mechanism (2) comprising a hydraulic cylinder (3) for extruding a molded material, and a hydraulic lifting column (4) mounted around the mold mechanism (2), the bottom of the hydraulic lifting column (4) passing through the frame (1) and exposed from the bottom of the frame (1), the hydraulic lifting column (4) being mounted at the four corners of the frame (1), a rectangular window being provided in the middle of the top of the frame (1), the mold mechanism (2) being mounted in the middle of the rectangular window, a top plate (7) being mounted parallel to the top of the frame (1), the top plate (7) being mounted and lifted with the frame (1) through the hydraulic lifting column (4), the hydraulic cylinder (3) being bolted in the middle of the top of the top plate (7), the top of the top plate (7) being centrally symmetrically mounted with an injection valve tube (6), the output end of the hydraulic cylinder (3) being an extended rod-shaped structure, the middle of which is mounted with a built-in telescopic rod (31); A cooling mechanism (5) for cooling the mold mechanism (2), the cooling mechanism (5) comprising a cross air guide frame supported at the bottom of the mold mechanism (2), and a refrigeration air cylinder (8) installed in the middle of the top of the cooling mechanism (5), wherein a semiconductor refrigeration sheet and a fan are installed inside the refrigeration air cylinder (8); The mold mechanism (2) comprises an upper mold (21) and a lower mold (22), the upper mold (21) being sealed and clamped on the top of the lower mold (22), and the lower mold (22) and the upper mold (21) having the same structure, both of which are assembled from a pair of mold enclosure plate units (23), and the pair of mold enclosure plate units (23) are sealed and inserted in a bilaterally symmetrical manner, and a hydraulic push rod (24) is installed in the middle of one side of the mold enclosure plate unit (23) close to the hydraulic lifting column (4); A top mold base (25) and a bottom mold base (28) are respectively installed on the back surfaces of the upper mold (21) and the lower mold (22), and the bottom mold base (28) is fitted on the bottom of the lower mold (22), and the bottom mold base (28) is fixedly installed in the middle of the rectangular window of the frame (1) through the cooling air cylinder (8) and the cross air guide frame, and the top mold base (25) is fitted on the top of the upper mold (21), and the top mold base (25) and the upper mold (21) are surrounded by a quick-change clamp (26) and a twisting clamp (27) around the lower mold (22) and the bottom mold base (28), and the twisting clamp (27) is rotatably connected to the left and right ends of the quick-change clamp (26) in a left-right symmetrical shape, and a structure composed of a quick-change clamp (26) and a pair of twisting clamps (27) is installed on the upper mold (21) and the lower mold (22) in a front-back symmetrical shape; A tongue-springing rod (281) is installed inside the bottom mold base (28), and the tongue-springing rod (281) is elastically and telescopically connected to the bottom mold base (28). A guide cavity opening (29) is opened on one side of the bottom mold base (28) facing the top mold base (25) and is connected in a bilaterally symmetrical manner. The top of the bottom mold base (28) forms a rectangular protruding structure at the middle of its top end through the opening of the guide cavity opening (29). The rectangular protruding structure is in contact with the lower mold (22). The mold enclosure plate unit (23) is fixedly connected to a raised frame edge (210) at the middle of the edge facing the quick-change fixture (26); the mold enclosure plate unit (23) is slidably mounted on the bottom mold base (28) by cooperating with the raised frame edge (210) and the cavity guide opening (29); and the mold enclosure plate unit (23) is sealed and mounted on the bottom mold base (28) by cooperating with the raised frame edge (210) and the rectangular raised structure on the top of the bottom mold base (28); The quick-change clamp (26) comprises a first thick clamp (261), the first thick clamp (261) is clamped and installed around the two side plates of the mold enclosure plate unit (23) and the quick-change clamp (26), a first connecting plate (262) is installed on the top of the first thick clamp (261), a long plate (263) is installed on the bottom of the first thick clamp (261), a first electric push rod (264) is embedded and installed inside the first thick clamp (261), and the first connecting plate (262) is installed to be lifted and lowered together with the first thick clamp (261) via a long screw rod (265); A long screw rod (265) is threadedly mounted on the first connecting plate (262), the spring tongue rod (281) corresponds to the long screw rod (265) one-to-one, a second electric push rod (267) is mounted on the top of the long plate (263), and the second electric push rod (267) is mounted in an interlocking manner with the bottom mold base (28), the long plate (263) is lifted and lowered with the bottom mold base (28) through the second electric push rod (267), long guide pins (268) are staggeredly mounted on the top of the long plate (263) and the second electric push rod (267), the long guide pins (268) correspond to the long screw rod (265), and holes are provided on the side plates of the mold enclosure plate unit (23) and the side of the bottom mold base (28) corresponding to the long screw rods (265); A locking hole (641) is provided on the surface of the long screw (265), a locking tongue (642) is installed in a limited position inside the locking hole (641), and the locking tongue (642) is telescopically installed with the long screw (265) through the locking hole (641). A guide tongue cavity (681) is provided on the surface of the long guide pin (268) and close to the first electric push rod (264), and the guide tongue cavity (681) is used to lift and store the locking tongue (642). The spring tongue rod (281) is connected to the locking hole (641) and the first electric push rod (264). The locking tongue (642) pushes against and locks the long screw (265) in the bottom mold base (28); one end of the long guide pin (268) close to the locking tongue (642) is a curved guide structure, which is used to guide the locking tongue (642) into the guide tongue cavity (681) for lifting and guiding during the insertion of the long guide pin (268) into the long screw (265); the mold enclosure unit (23) is locked and installed with the bottom mold base (28) through the cooperation of the long screw (265) and the spring tongue rod (281).

2. A pre-pressing molding device for molded products according to claim 1, characterized in that: A core plate (211) is installed at the top of the inner side of the mold cavity of the upper mold (21); the output end of the hydraulic cylinder (3) is clamped with the top mold base (25); the built-in telescopic rod (31) is connected to the middle of the top of the core plate (211) by a thread; the core plate (211) is installed and raised and lowered with the upper mold (21) through the built-in telescopic rod (31); the upper mold (21) is installed and raised and lowered with the lower mold (22) through the cooperation of the top mold base (25) and the hydraulic cylinder (3); the output end of the injection valve tube (6) passes through the top mold base (25) and the core plate (211) in sequence and is connected to the mold cavity of the upper mold (21); the output end of the injection valve tube (6) is a telescopic tube structure.

3. A pre-pressing molding device for molded products according to claim 2, characterized in that: A double ring cover (241) is installed at one end of the hydraulic push rod (24) close to the mold enclosure plate unit (23), and the double ring cover (241) is flange-mounted at the middle of the mold enclosure plate unit (23). The output end of the hydraulic push rod (24) is connected to a push plug (242). A rubber ring (243) is installed at one end of the push plug (242) close to the double ring cover (241), and the rubber ring (243) is sleeved on the output end of the hydraulic push rod (24). The output end of the hydraulic push rod (24) is connected to the mold enclosure plate unit (23). A pressurized hole is provided at a location where the units (23) are inserted, and a push plug (242) is telescopically movable in the pressurized hole of the mold enclosure plate unit (23) through a hydraulic push rod (24), a hoop sleeve (244) is fixedly connected to the pressurized hole provided in the middle of the mold enclosure plate unit (23), and two one-way air valves (245) are inserted in a centrally symmetrical manner on the double ring cover (241), and the input ends of the one-way air valves (245) pass through the double ring cover (241) and the hoop sleeve (244) in sequence and are communicated with the pressurized hole.

4. A pre-pressing molding device for molded products according to claim 3, characterized in that: The torsion clamp (27) comprises a second thick clamp (271), a second connecting plate (272) is installed on the top of the second thick clamp (271), and a short plate (273) is installed on the bottom of the second connecting plate (272), the second thick clamp (271) has the same structure as the first thick clamp (261), and the two are hinged; the second connecting plate (272) has the same structure as the first connecting plate (262), and the two are hinged; the long plate (263) has the same structure as the short plate (273), and the two are hinged.

5. The pre-pressing molding device for molded products according to claim 4, characterized in that: The second thick clamping plate (271) and the first thick clamping plate (261) are both provided with an inner cavity (274) in the middle of one side facing the mold enclosure plate unit (23), and the first thick clamping plate (261) fits and clamps the side plate and the bottom mold base (28) of the mold enclosure plate unit (23) together through the inner cavity (274).

6. A pre-pressing molding device for molded products according to claim 5, characterized in that: A DD motor (269) is embedded and installed at one end of the first thick splint (261) close to the second thick splint (271); a long shaft pin (212) is installed at the hinged part between the first thick splint (261) and the second thick splint (271); the DD motor (269) is meshed with the gear assembly on the long shaft pin (212) for transmission through its output end; the second thick splint (271) is rotatably installed with the first thick splint (261) through the cooperation of the DD motor (269) and the long shaft pin (212).

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