A mold suitable for use in the cast forming of a material which is susceptible to shrinkage

Abstract

The embodiment of the application provides a mold suitable for casting forming of easy-shrinkage material, and relates to the technical field of easy-shrinkage material casting. The mold suitable for casting forming of easy-shrinkage material comprises a lower mold, the surface of the lower mold is provided with a product cavity for forming a product; an upper mold is movably connected with the lower mold, an excess cavity for accommodating excess material is provided in the upper mold, and an ejection mechanism is used for pushing out the formed product in the product cavity and pushing out the excess material in the upper mold. Through the layered cavity design of the upper mold and the lower mold, the magnetic attraction mold closing mechanism, the mold pushing dislocation broken material structure and the anti-slip ejection mechanism, the problems of easy-shrinkage material casting and easy hollowing are solved, the excess material is recycled, the mold closing stability and the ejection smoothness are guaranteed, material waste is reduced, and the product forming quality and the production efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of easy-shrink material pouring technology, in particular to a mold suitable for easy-shrink material pouring forming. BACKGROUND

[0002] In the field of easy-shrink material (such as some high polymer composite materials, low-temperature curing forming materials, etc.) pouring forming, the mold is a key equipment to ensure product forming quality and production efficiency. Due to the molecular structure or curing characteristics of such materials, the shrinkage ratio is generally large during the forming process, and defects such as internal hollow and surface depression are prone to occur, which puts high requirements on the cavity design, pouring control and demolding stability of the mold.

[0003] In the prior art, the pouring mold for easy-shrink materials mostly adopts a single-layer cavity structure, and it is difficult to accurately match the pouring amount with the material shrinkage requirement: if the pouring amount is insufficient, the material is prone to form a hollow product after shrinkage, resulting in scrap; if the pouring amount is excessive, the excess material is closely adhered to the finished product, which is difficult to separate and recycle, causing a large amount of material waste. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a mold suitable for easy-shrink material pouring forming, which solves the problem of easy hollow pouring of easy-shrink materials and realizes excess material recycling, guarantees stable mold closing and smooth demolding, reduces material waste, and improves product forming quality and production efficiency through the layered cavity design of the upper mold and the lower mold, the magnetic closing mechanism, the push-mold misalignment and material breaking structure, and the anti-slip demolding mechanism.

[0005] According to an embodiment of the present application, a mold suitable for easy-shrink material pouring forming comprises:

[0006] a lower mold, the surface of the lower mold being provided with a product cavity for forming a product;

[0007] an upper mold movably connected with the lower mold, an excess cavity for accommodating excess material being provided inside the upper mold;

[0008] a demolding mechanism for pushing out the formed product in the product cavity and pushing out the excess material in the upper mold, wherein the demolding mechanism comprises a ejector pin, an end of the ejector pin penetrating through the lower mold and extending into the product cavity for ejecting the formed product in the product cavity;

[0009] wherein the front and rear ends of the ejector pin are provided with a roller one and a roller two in transverse direction, the roller one and the roller two being driven by a driving structure, after the upper mold and the lower mold are at an angle of 90°, the roller one and the roller two are driven by the driving structure to extrude and push the ejector pin on the outside, and the ejector pin is driven to move into the product cavity to complete the product demolding.

[0010] According to some embodiments of the present application, the excess cavity is conical, and the product cavity is semicircular, and the tip opening of the excess cavity and the inner cavity of the product cavity are in communication after the upper die and the lower die are attached to each other.

[0011] The bottom of the surface of the lower die and below the product cavity is provided with a through hole, and the through hole and the inner cavity of the product cavity are in communication, and the end of the ejector pin is provided with a circular arc groove.

[0012] According to some embodiments of the present application, the surface of the upper die and the lower die is further provided with a die pushing mechanism, wherein the die pushing mechanism is used to movably connect the upper die and the lower die, and to push the upper die and the lower die to offset.

[0013] The die pushing mechanism comprises a movable plate and a fixed plate, the movable plate is movably connected to the surface of the upper die through bolts, and the fixed plate is movably connected to the lower die.

[0014] Meanwhile, the movable plate and the fixed plate are provided with a rotating shaft.

[0015] According to some embodiments of the present application, the surface of the rotating shaft is provided with reset coil springs on both sides, and the die pushing mechanism further comprises a mounting groove provided on one side of the surface of the lower die, wherein the inner wall of the movable plate is connected with a connecting rod, the surface of the connecting rod is provided with spring sleeves at both ends, and the surface of the connecting rod is slidably provided with a connecting block.

[0016] According to some embodiments of the present application, the ejector mechanism comprises mounting seats provided on the front and rear sides below the lower die, wherein the mounting seats and the lower die are movably connected at opposite ends through bolts, and the inner surface of the mounting seats is provided with a limiting groove, wherein the surface of the ejector pin is connected with a limiting disc, and the limiting disc is slidably arranged in the inner cavity of the limiting groove to limit the ejector pin.

[0017] According to some embodiments of the present application, the driving structure comprises gear one and gear two provided on the surfaces of the first roller and the second roller, the other shaft end of the first roller is provided with a synchronous wheel, there are two synchronous wheels provided on the surfaces of the two first rollers, and the two synchronous wheels are drivingly connected through a synchronous belt.

[0018] According to some embodiments of the present application, the surfaces of the first roller, the second roller and the ejector pin are provided with anti-skid treatment, wherein the anti-skid treatment is to provide anti-skid lines on the surfaces of the first roller, the second roller and the ejector pin.

[0019] According to some embodiments of the present application, the two ends of the upper die are provided with two mold opening flaps along the axis, wherein one end of the mold opening flap is provided with a limiting hole, and the two sides of the lower die are movably connected with abutting pieces through damping shafts, and the other end of the abutting piece is inserted into the limiting hole in the mold opening flap.

[0020] According to some embodiments of the present application, the opposite end of the upper die and the lower die is also provided with a die closing mechanism, which comprises a magnet one and a magnet two, wherein the magnet one and the magnet two are respectively embedded in the surface of the upper die and the lower die, and the magnet one and the magnet two are both multiple.

[0021] According to some embodiments of the present application, the end of the upper die is embeddedly installed with a blade, and the surface of the blade is provided with a blade edge which is in communication with the product cavity.

[0022] The beneficial effects of the present application are: the pouring forming die suitable for easy shrinkage materials described in the patent, through the layered cooperation design of the upper die and the lower die, combining the conical excess cavity of the upper die and the semicircular product cavity of the lower die, and using the pouring amount of 1.5 times the product volume, effectively solves the problem of easy hollowing of easy shrinkage materials due to large shrinkage ratio, at the same time, the excess material in the excess cavity can be recycled and melted for reuse, significantly reducing material waste and production cost; when closing the die, relying on the adsorption effect of the magnet one and the magnet two embedded in the contact surface of the upper die and the lower die in the die closing mechanism, the combined state of the two can be stably maintained, avoiding displacement after closing the die, and ensuring the stability of the pouring process and the product forming precision; after forming, the push die mechanism can push the upper die to be transversely dislocated relative to the lower die through the cooperative matching of the movable plate, the fixed plate, the shaft piece, the connecting rod, the spring and the installation slot, efficiently disconnecting the material connection between the excess cavity and the product cavity, and the upper die can be accurately returned under the action of the reset spring; in the opening stage, the abutting pieces connected by the damping shaft on both sides of the lower die are inserted into the limiting holes of the opening baffle on both ends of the upper die, so that the upper die and the lower die stably form a 90° angle, providing sufficient space for demolding operation; during the demolding process, the end arc groove of the ejector pin can be spliced with the product cavity to form a complete semicircular groove, ensuring that the product forming shape is regular, and when the ejector pin moves along the through hole of the lower die, the precise positioning is realized by the sliding of the limiting disc in the limiting groove of the mounting seat, preventing the ejector pin from disengaging or deviating; the driving structure drives the rollers one and two to stably move through the transmission of the gear one, the gear two, the synchronous wheel and the mounting disc, and cooperates with the anti-slip treatment on the surface of the three to avoid slipping when pressing the ejector pin, ensuring that the formed product in the product cavity can be stably pushed out, and the excess material in the excess cavity can be pushed out after closing the die, the overall process has high automation degree and convenient operation, and the efficiency and product quality of the pouring forming of easy shrinkage materials are greatly improved.

[0023] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by practicing the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those of ordinary skill in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 is a schematic diagram of the overall structure assembly of a mold for casting forming of a material susceptible to shrinkage according to an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of the overall structure assembly of a mold for casting forming of a material susceptible to shrinkage according to an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of the structure assembly of an upper mold and a lower mold according to an embodiment of the present application;

[0028] Figure 4 is a schematic diagram of the structure assembly of an upper mold and a lower mold according to an embodiment of the present application;

[0029] Figure 5 is a schematic diagram of the structure assembly of a connecting rod and a spring in an installation groove according to an embodiment of the present application;

[0030] Figure 6 is a schematic diagram of the communication state of a residual cavity and a product cavity in an upper mold and a lower mold according to an embodiment of the present application;

[0031] Figure 7 is a schematic diagram of the structure of an installation seat according to an embodiment of the present application;

[0032] Figure 8 is a schematic diagram of the structure of an installation seat according to an embodiment of the present application;

[0033] Figure 9 is a schematic diagram of the structure of a roller one and a roller two according to an embodiment of the present application;

[0034] Figure 10 is a schematic diagram of the structure assembly of a roller one and a roller two according to an embodiment of the present application;

[0035] Figure 11 is a schematic diagram of the structure of an installation seat, a top pin, a roller one and a roller two according to an embodiment of the present application;

[0036] Figure 12 is a schematic diagram of the structure of an installation seat, a top pin, a roller one and a roller two according to an embodiment of the present application; Figure 11 is a schematic diagram of the structure of an installation seat, a top pin, a roller one and a roller two according to an embodiment of the present application;

[0037] Icons: 100, Upper mold; 101, Reserve cavity; 110, Mold opening baffle; 120, Magnet one; 200, Lower mold; 201, Product cavity; 202, Through hole; 210, Abutment part; 220, Magnet two; 300, Blade; 301, Cutting edge; 400, Movable plate; 410, Fixed plate; 420, Rotating shaft; 430, Reset coil spring; 440, Mounting groove; 450, Connecting rod; 460, Spring; 500, Mounting base; 501, Limiting groove; 600, Ejector pin; 610, Limiting plate; 700, Roller one; 710, Roller two; 720, Gear one; 730, Gear two; 740, Synchronous pulley; 750, Mounting plate. Detailed Implementation

[0038] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0039] The following describes a mold suitable for casting easily shrinkable materials according to an embodiment of this application, with reference to the accompanying drawings.

[0040] like Figures 1-12 As shown in the embodiment of this application, a mold suitable for casting and molding easily shrinkable materials includes: a lower mold 200, an upper mold 100, and a demolding mechanism. The surface of the lower mold 200 is provided with a product cavity 201 for molding the product. The upper mold 100 is movably connected to the lower mold 200 and has a through cavity 101 for accommodating excess material.

[0041] like Figure 6 As shown, the allowance cavity 101 is conical; while the product cavity 201 is semi-circular. After the upper mold 100 and the lower mold 200 are fitted together, the tip opening of the allowance cavity 101 is connected to the inner cavity of the product cavity 201.

[0042] A through hole 202 is provided at the bottom of the surface of the lower mold 200, below the product cavity 201. The through hole 202 communicates with the inner cavity of the product cavity 201 and forms a channel for the ejector pin 600 to move, so that the ejector pin 600 enters the product cavity 201 and pushes the molded product outward.

[0043] Specifically, an arc groove is provided at the end of the ejector pin 600 near the product cavity 201. After the ejector pin 600 extends into the cavity of the through hole 202, the arc groove at its end is combined with the product cavity 201 to form a complete semi-circular cavity, so that the product cavity 201 can be used for subsequent casting.

[0044] Two mold opening blocks 110 are symmetrically arranged at both ends of the upper mold 100 along the axis, one end of the mold opening block 110 is provided with a limiting hole, and the other side of the lower mold 200 is movably connected with an abutting piece 210 through a damping shaft, corresponding to the position of the mold opening block 110 in the upper mold 100, and the other end of the abutting piece 210 is inserted into the limiting hole in the mold opening block 110, which can block the mold opening block 110 during mold opening, so that the upper mold 100 and the lower mold 200 form a 90° angle.

[0045] The opposite ends of the upper mold 100 and the lower mold 200 are also provided with a mold closing mechanism, which includes a magnet one 120 and a magnet two 220, wherein the magnet one 120 and the magnet two 220 are embedded in the surface of the upper mold 100 and the lower mold 200 respectively, and the magnet one 120 and the magnet two 220 are both multiple, and the magnet one 120 and the magnet two 220 are attracted when the upper mold 100 and the lower mold 200 are closed, limiting the displacement of the upper mold 100 and the lower mold 200.

[0046] Push the upper mold 100 to move towards the lower mold 200 and realize mold closing under the cooperation of the magnet one 120 and the magnet two 220 in the mold closing mechanism; the magnet one 120 and the magnet two 220 are arranged on the contact surface of the upper mold 100 and the lower mold 200, and when the upper mold 100 and the lower mold 200 are closed, the magnet one 120 and the magnet two 220 are attracted to each other to maintain the combined state of the two.

[0047] In actual application, the present scheme can be additionally provided with a blade 300, the end of the upper mold 100 is embedded and installed with the blade 300, and the surface of the blade 300 is provided with a blade edge 301 which is in communication with the product cavity 201, at the same time, the surface of the blade 300 is embedded with a magnetic attraction block which is attracted to the magnet one 120 and the magnet two 220 respectively, and the edge of the blade edge 301 is sharpened;

[0048] When the mold pushing mechanism pushes the upper mold 100 to offset and dislocate between the upper mold 100 and the lower mold 200, the excess material in the excess cavity 101 offsets and contacts the edge of the blade edge 301, cutting off the connection of the product between the excess cavity 101 and the product cavity 201.

[0049] As shown in Figures 2-5 The surface of the upper mold 100 and the lower mold 200 is also provided with a mold pushing mechanism, wherein the mold pushing mechanism is used to movably connect the upper mold 100 and the lower mold 200, and push the upper mold 100 to offset between the upper mold 100 and the lower mold 200, so as to separate the excess material in the excess cavity 101 and the product in the product cavity 201

[0050] The push mold mechanism comprises a movable plate 400 and a fixed plate 410, wherein the movable plate 400 and the fixed plate 410 are arranged on the non-adhering sides of the upper mold 100 and the lower mold 200 respectively, the movable plate 400 is fastened and connected with the surface of the upper mold 100 through bolts, and the fixed plate 410 is movably connected with the lower mold 200,

[0051] Meanwhile, a rotating shaft 420 is arranged between the movable plate 400 and the fixed plate 410, the rotating shaft 420 is used for movably connecting the movable plate 400 and the fixed plate 410, and the reset coil spring 430 can also be installed.

[0052] In actual application, the push mold mechanism is multiple, and the push mold mechanism shown in the scheme is three. Figure 2

[0053] Specifically, the fixed plate 410 is movably connected with the rotating shaft 420, and one end of the movable plate 400 is fixedly sleeved on the surface of the rotating shaft 420, wherein the surface of the rotating shaft 420 is provided with the reset coil spring 430 on both sides, and the other end of the reset coil spring 430 is connected with the upper mold 100, and the upper mold 100 can be reset under the action of the reset coil spring 430.

[0054] The push mold mechanism further comprises a mounting groove 440 arranged on one side of the surface of the lower mold 200, wherein the inner wall of the movable plate 400 is connected with a connecting rod 450, the surface of the connecting rod 450 is sleeved with a spring 460 on both ends, and the opposite ends of the two oppositely arranged springs 460 are connected with the inner wall of the movable plate 400.

[0055] Specifically, the surface of the connecting rod 450 is slidably sleeved with a connecting block, and one end of the connecting block is connected with the surface of the fixed plate 410, wherein the end of the spring 460 away from the movable plate 400 is connected with the surface of the connecting block.

[0056] Therefore, when adjusting the misalignment of the upper mold 100 relative to the lower mold 200, the upper mold 100 can be moved in the movable plate 400 based on the push mold mechanism to adjust the misalignment of the upper mold 100 relative to the lower mold 200.

[0057] Through the mounting groove 440, the connecting rod 450 and the spring 460, the upper mold 100 can be horizontally misaligned and offset relative to the lower mold 200 by a distance.

[0058] ​The demolding mechanism is used for pushing out the products in the product cavities 201 and the excess material in the upper mold 100. The demolding mechanism comprises a plurality of ejector pins 600 arranged at the front and rear ends below the lower mold 200. The end of the ejector pin 600 penetrates the lower mold 200 and extends into the product cavity 201, and is used for ejecting the products in the product cavity 201.

[0059] The front and rear ends of the ejector pin 600 are transversely provided with a roller one 700 and a roller two 710. The single roller one 700 and the single roller two 710 are a group. According to the arrangement of the product cavities 201 in the lower mold 200 and the ejector pins 600, the roller one 700 and the roller two 710 are arranged in two groups in the present scheme. The two groups of oppositely arranged roller one 700 and roller two 710 are driven by a driving structure. The roller one 700 and the roller two 710 are arranged at the outer side of the adjacent ejector pin 600. After the upper mold 100 and the lower mold 200 form an angle of 90°, the roller one 700 and the roller two 710 are driven by the driving structure to press and push the outer side of the ejector pin 600, so as to drive the ejector pin 600 to move into the product cavity 201 to complete the product demolding.

[0060] The angle formed by the upper mold 100 and the lower mold 200 ranges from 85° to 95°, and is preferably 90°.

[0061] The demolding mechanism comprises a mounting seat 500 arranged below the lower mold 200 at the front and rear sides. The opposite end of the mounting seat 500 and the lower mold 200 is connected by a bolt fastening. The inner surface of the mounting seat 500 is provided with a limiting groove 501. The surface of the ejector pin 600 is connected with a limiting disc 610. The limiting disc 610 is slidingly arranged in the inner cavity of the limiting groove 501, and is used for limiting the ejector pin 600 to avoid the ejector pin 600 from separating from the mounting seat 500. The ejector pin 600 penetrates the inner cavity of the limiting groove 501. Thus, when the ejector pin 600 moves, the limiting disc 610 on the surface of the ejector pin 600 moves with it and slides in the limiting groove 501.

[0062] As shown in Figure 8 The driving structure comprises a gear one 720 and a gear two 730 arranged on the surface of the roller one 700 and the roller two 710. That is, in the present scheme, the gear one 720 and the gear two 730 are two, and the two gear one 720 is arranged on the shaft end of the two roller one 700, and the two gear two 730 is arranged on the shaft end of the two roller two 710. The single gear one 720 and the single gear two 730 between the adjacent ones are meshed with each other. Thus, the adjacent roller one 700 and the roller two 710 can be driven to move relatively or oppositely.

[0063] Specifically, as shown in Figures 8-10As shown, the shaft end of the roller one 700 is sleeved with a synchronous wheel 740, wherein the synchronous wheel 740 is installed on the side away from the gear part one 720 and the gear part two 730, and in this scheme, there are two synchronous wheels 740 sleeved on the surfaces of the two roller ones 700.

[0064] In actual application, the two synchronous wheels 740 are connected through a synchronous belt transmission, so that when a single roller one 700 rotates, the other roller one 700 can be driven to rotate through the synchronous belt and the synchronous wheel 740, and under the action of the gear part one 720 and the gear part two 730, a plurality of adjacent groups of the roller one 700 and the roller two 710 are driven to move.

[0065] In specific implementation, the shaft end surface of the roller one 700 is movably sleeved with a mounting disc 750 through a bearing, and the top of the mounting disc 750 is connected with the bottom of the mounting seat 500 to assist in supporting the parts such as the roller one 700 and the roller two 710.

[0066] In actual use, as shown, Figure 7 As shown, the shaft end of a single roller one 700 is connected with a connecting disc, which can be connected with a hand crank or a driving motor to manually or automatically drive the single roller one 700 to rotate, thereby assisting in realizing the coordinated movement of the adjacent groups of the roller one 700 and the roller two 710.

[0067] In actual use, by controlling the upper die 100 and the lower die 200 to be separated at ninety degrees, the adjacent ejector pins 600 can be pushed to move when the roller one 700 and the roller two 710 move cooperatively, so as to push out the finished product in the product cavity 201, and then the upper die 100 and the lower die 200 are turned over to be attached, and the ejector pins 600 are continuously pushed up by the roller one 700 and the roller two 710, so that the ejector pins 600 penetrate into the inner cavity of the excess cavity 101 to push out the excess material inside, realizing the demolding of the excess material in the excess cavity 101.

[0068] The surfaces of the roller one 700, the roller two 710 and the ejector pin 600 are treated with anti-skid treatment, wherein the anti-skid treatment is to form anti-skid lines on the surfaces of the roller one 700, the roller two 710 and the ejector pin 600, and in actual use, anti-skid paint can also be coated on the surfaces of the roller one 700, the roller two 710 and the ejector pin 600, or a rubber sleeve with increased friction can be sleeved on the surfaces of the roller one 700, the roller two 710 and the ejector pin 600, to avoid slipping when the roller one 700 and the roller two 710 move the ejector pin 600.

[0069] In this scheme, the anti-skid lines, the anti-skid material coated thereon and the anti-skid rubber sleeve sleeved thereon of the roller one 700, the roller two 710 and the ejector pin 600 can exist independently or in parallel.

[0070] In summary, when the mold is closed, the upper mold 100 is pushed to move downwardly to the lower mold 200, and the magnet one 120 and the magnet two 220 embedded in the two adhering surfaces of the mold closing mechanism are mutually adsorbed to keep the combined state. At this time, the tapered excess cavity 101 tip opening of the upper mold 100 is in communication with the inner cavity of the semicircular product cavity 201 of the lower mold 200, and the circular arc groove at the end of the ejector pin 600 and the product cavity 201 are spliced to form a complete semicircular groove cavity. Then, the product volume 1.5 times of the easily shrinkable material is injected to complete the crystallization molding. After molding, the mold pushing mechanism pushes the upper mold 100 to be laterally dislocated relative to the lower mold 200 through the cooperation of the movable plate 400, the fixed plate 410, the rotating shaft 420, the connecting rod 450, the spring 460 and the mounting groove 440, disconnects the connection between the excess cavity 101 and the product cavity 201, and then the upper mold 100 is reset under the action of the reset coil spring 430. Then, the abutting pieces 210 connected by the damping rotating shaft on both sides of the lower mold 200 are inserted into the limiting holes of the mold opening stopper 110 at both ends of the upper mold 100, so that the upper mold 100 and the lower mold 200 form a 90° angle. The driving structure drives the roller one 700 and the roller two 710 below the mounting seat 500 to move through the transmission of the gear one 720, the gear two 730, the synchronous wheel 740 and the mounting disc 750. The roller one 700 and the roller two 710 extrude the outside of the ejector pin 600, the ejector pin 600 moves along the through hole 202 of the lower mold 200, and at the same time, the limiting disc 610 is limited by sliding in the limiting groove 501 of the mounting seat 500, and the molded product in the product cavity 201 is ejected. Finally, the mold closing mechanism pushes the upper mold 100 and the lower mold 200 to be adhered again, and the two groups of demolding rollers continue to extrude the ejector pin 600, the ejector pin 600 penetrates into the excess cavity 101 to eject the internal excess material, and the antiskid treatment on the surfaces of the roller one 700, the roller two 710 and the ejector pin 600 avoids slipping during movement, completes a complete pouring forming and demolding process, and the excess material can be recycled and melted for reuse.

[0071] The above is only an embodiment of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0072] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A mold suitable for casting easily shrinkable materials, characterized in that, include: The lower mold (200) has a product cavity (201) on its surface for forming the product. The upper mold (100) is movably connected to the lower mold (200), and has a through cavity (101) for accommodating excess material. A demolding mechanism is used to eject the molded product in the product cavity (201) and eject the remaining material in the upper mold (100), wherein the demolding mechanism includes an ejector pin (600), wherein the end of the ejector pin (600) passes through the lower mold (200) and extends into the product cavity (201) for ejecting the molded product in the product cavity (201); Among them, roller 1 (700) and roller 2 (710) are arranged laterally at the front and rear ends of the ejector pin (600). Roller 1 (700) and roller 2 (710) are driven by a drive structure. After the upper mold (100) and the lower mold (200) form a 90° angle, the drive structure drives roller 1 (700) and roller 2 (710) to squeeze and push the outside of the ejector pin (600), driving the ejector pin (600) to move into the product cavity (201) to complete the product demolding. The allowance cavity (101) is conical; while the product cavity (201) is semi-circular. After the upper mold (100) and the lower mold (200) are fitted together, the tip opening of the allowance cavity (101) is connected to the inner cavity of the product cavity (201). Wherein, a through hole (202) is provided at the bottom of the surface of the lower mold (200) and below the product cavity (201), wherein the through hole (202) is connected to the inner cavity of the product cavity (201), and an arc groove is provided at the end of the ejector pin (600); The surfaces of the upper mold (100) and the lower mold (200) are also provided with a push mold mechanism, wherein the push mold mechanism is used to movably connect the upper mold (100) and the lower mold (200) and push the upper mold (100) and the lower mold (200) to offset each other; The push-die mechanism includes a movable plate (400) and a fixed plate (410). The movable plate (400) is fastened to the surface of the upper die (100) by bolts, while the fixed plate (410) is movably connected to the lower die (200). Meanwhile, a pivot (420) is provided between the movable plate (400) and the fixed plate (410). Both sides of the surface of the rotating shaft (420) are equipped with reset coil springs (430), and the push mold mechanism also includes an installation groove (440) opened on one side of the surface of the lower mold (200). The inner wall of the movable plate (400) is connected to a connecting rod (450), and both ends of the surface of the connecting rod (450) are fitted with springs (460). A connecting block is slidably fitted on the surface of the connecting rod (450). The demolding mechanism includes mounting seats (500) located on the front and rear sides below the lower mold (200). The mounting seats (500) and the lower mold (200) are fastened to each other by bolts. The inner surface of the mounting seats (500) is provided with a limiting groove (501). The surface of the ejector pin (600) is connected to a limiting plate (610). The limiting plate (610) is slidably disposed in the inner cavity of the limiting groove (501) to limit the ejector pin (600). The upper mold (100) has two mold opening baffles (110) symmetrically arranged at both ends along the axis. One end of the mold opening baffle (110) has a limiting hole, and both sides of the lower mold (200) are movably connected to abutment members (210) through damping shafts. The other end of the abutment member (210) is inserted into the limiting hole in the mold opening baffle (110).

2. The mold for casting easily shrinkable materials according to claim 1, characterized in that, The drive structure includes gear component 1 (720) and gear component 2 (730) sleeved on the surfaces of roller 1 (700) and roller 2 (710). A synchronous pulley (740) is sleeved on the other shaft end of roller 1 (700). There are two synchronous pulleys (740) and they are respectively sleeved on the surfaces of the two rollers 1 (700). The two synchronous pulleys (740) are connected by a synchronous belt drive.

3. The mold for casting easily shrinkable materials according to claim 2, characterized in that, The surfaces of roller one (700), roller two (710) and ejector pin (600) are all treated with anti-slip treatment, wherein the anti-slip treatment is to open anti-slip texture on the surfaces of roller one (700), roller two (710) and ejector pin (600).

4. The mold for casting easily shrinkable materials according to claim 1, characterized in that, The upper mold (100) and the lower mold (200) are provided with a mold closing mechanism at opposite ends. The mold closing mechanism includes a magnet one (120) and a magnet two (220). The magnet one (120) and the magnet two (220) are respectively embedded on the surface of the upper mold (100) and the lower mold (200), and there are multiple magnets one (120) and magnet two (220).

5. The mold for casting easily shrinkable materials according to claim 1, characterized in that, The upper mold (100) is fitted with a blade (300) at its end, and the surface of the blade (300) is provided with a cutting edge (301) that communicates with the product cavity (201).

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