CN109177057B - Combined injection mold - Google Patents
Combined injection mold Download PDFInfo
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- CN109177057B CN109177057B CN201810930937.7A CN201810930937A CN109177057B CN 109177057 B CN109177057 B CN 109177057B CN 201810930937 A CN201810930937 A CN 201810930937A CN 109177057 B CN109177057 B CN 109177057B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the field of molds and discloses a combined injection mold which comprises an upper mold and a lower mold, wherein the upper mold comprises a first inner sleeve and a first outer sleeve, the lower mold comprises a second inner sleeve and a second outer sleeve, the first inner sleeve is embedded in the first outer sleeve, the second inner sleeve is embedded in the second outer sleeve, and the materials for manufacturing the first inner sleeve and the second inner sleeve respectively comprise the following components in parts by weight: 90-100 parts of epoxy resin powder, 80-85 parts of polyvinyl chloride powder, 20-40 parts of aluminum hydroxide powder, 25-30 parts of iron powder, 40-45 parts of maleic anhydride powder, 9.7-10.6 parts of asphalt and 60-80 parts of silicon dioxide powder; in order to solve the problems of high cost and low strength and impact resistance of the first inner sleeve or the second inner sleeve in the prior art, the scheme reduces the addition of aluminum hydroxide and iron by adding a large amount of epoxy resin, polyvinyl chloride and silicon dioxide, so that the cost for manufacturing the first inner sleeve or the second inner sleeve is reduced, and the strength and the impact resistance of the manufactured first inner sleeve or the second inner sleeve are also enhanced.
Description
Technical Field
The invention relates to the field of molds, in particular to a combined injection mold.
Background
The injection molding of engineering plastics needs to be carried out at high temperature and high pressure, the materials used as the inner sleeve of the injection mold generally need to resist high temperature, high pressure and impact, have high hardness and are not easy to deform, alloy steel is generally directly used as the material of the inner sleeve of the injection mold in the prior art, the alloy steel needs to be made of a large amount of metal, and the cost is generally high.
In order to solve the above problems, the invention patent with chinese application No. 201310438168.6 discloses an epoxy resin cured product, comprising by weight: 80-85 parts of epoxy resin 6207 #; 15-18 parts of epoxy resin 634 #; 230-250 parts of metal aluminum powder; 40-45 parts of maleic anhydride; 5.6-5.9 parts of glycerol. The inner sleeve of the injection mold obtained by the scheme is silver gray, has metallic luster, good heat resistance, hardness, impact strength and compressive strength, and is low in cost due to the fact that various raw materials are cheap.
The technical scheme has the advantages that the epoxy resin and the like are used for replacing metal substances in the prior art, the problem that alloy steel used in the prior art is high in cost is solved, the problems that metal aluminum powder is still large in addition amount and high in cost, the heat resistance, hardness, impact strength and compressive strength of the inner sleeve of the injection mold manufactured through the technical scheme are mainly enhanced through the metal aluminum powder, the epoxy resin contributes to the heat resistance, hardness, impact strength and compressive strength of the inner sleeve of the injection mold manufactured through the technical scheme to a certain extent, the contribution is small, the hardness and impact strength of the inner sleeve of the injection mold manufactured through the technical scheme are general, the inner sleeve of the injection mold is easy to damage, and industrial production is not facilitated.
Disclosure of Invention
The invention aims to provide a combined injection mold which can manufacture a nonmetal injection mold inner sleeve with high hardness and impact strength and can reduce the cost.
Modular injection mold in this scheme, including last mould and lower mould, go up the mould and include first endotheca and first overcoat, the lower mould includes second endotheca and second overcoat, and first endotheca is inlayed in first overcoat, and the second endotheca is inlayed in the second overcoat, and the material of preparation first endotheca and second endotheca all includes the component of following parts by weight: 90-100 parts of epoxy resin powder, 80-85 parts of polyvinyl chloride powder, 20-40 parts of aluminum hydroxide powder, 25-30 parts of iron powder, 40-45 parts of maleic anhydride powder, 9.7-10.6 parts of asphalt and 60-80 parts of silicon dioxide powder.
The technical principle of the scheme is as follows: the strength and the impact resistance of the manufactured first inner sleeve or the manufactured second inner sleeve are improved by combining the epoxy resin with the polyvinyl chloride, the epoxy resin can be used as a base material for the whole first inner sleeve or the second inner sleeve, the epoxy resin and the polyvinyl chloride are blended by using maleic anhydride powder, so that the epoxy resin and the polyvinyl chloride can exert the functions of the epoxy resin and the polyvinyl chloride, silicon dioxide is added, the strength, the impact resistance, the high temperature resistance, the high pressure resistance and the wear resistance of the manufactured first inner sleeve or the manufactured second inner sleeve are further improved, the strength and the impact resistance are particularly obvious, the epoxy resin is more suitable to be used as a raw material of the first inner sleeve or the manufactured second inner sleeve, asphalt is used for guiding the mixing of all materials, the mixing is more uniform, bubbles are not easily generated, the aluminum hydroxide and the iron are used for further blending all the materials, and the strength and the impact resistance of the manufactured first inner sleeve or the manufactured second inner sleeve are, and the manufactured first inner sleeve or second inner sleeve has certain metal characteristics, can emit metal luster, and improves the high temperature resistance, high pressure resistance and wear resistance of the manufactured first inner sleeve or second inner sleeve.
The first inner sleeve made of the components is inlaid in the first outer sleeve, and the second inner sleeve made of the components is inlaid in the second outer sleeve, so that the first inner sleeve and the first outer sleeve or the second inner sleeve and the second outer sleeve are convenient to disassemble and replace.
Compared with the prior art, the beneficial effect of this scheme does:
1. according to the scheme, a large amount of epoxy resin, polyvinyl chloride and silicon dioxide are added, the addition of aluminum hydroxide and iron is reduced, the cost for manufacturing the first inner sleeve and the second inner sleeve is reduced, the epoxy resin, the polyvinyl chloride and the silicon dioxide play a main role, and the aluminum hydroxide and the iron are used for assisting in blending, so that the characteristic of metal is exerted, the strength and the impact resistance of the manufactured first inner sleeve and the manufactured second inner sleeve are obviously enhanced, the high temperature resistance, the high pressure resistance, the impact resistance and the high hardness can be manufactured, the non-metal first inner sleeve and the non-metal second inner sleeve are not easy to deform, and the manufactured first inner sleeve and the manufactured second inner sleeve are not easy to damage.
2. This scheme is through inlaying first endotheca in first overcoat, and the second endotheca is inlayed in the second overcoat, and first endotheca, second endotheca, first overcoat or second overcoat if wearing and tearing have appeared in the in-process that uses, and operating personnel will change first endotheca, second endotheca, first overcoat or second overcoat, avoid whole injection mold to carry out recovery processing entirely, have reduced the use of raw and other materials to the cost is reduced.
Furthermore, the materials for manufacturing the first inner sleeve and the second inner sleeve also comprise 0.1-1 part of organic silicon defoaming agent. The silicone defoaming agent can further prevent bubbles from being generated, and prevent the strength, the impact resistance and the like of the manufactured first inner sleeve or second inner sleeve from being reduced due to the bubbles.
Furthermore, the materials for manufacturing the first inner sleeve and the second inner sleeve also comprise 4.4-6.2 parts of straw powder. The toughness and the wear resistance of the whole first inner sleeve or the second inner sleeve are improved, so that the first inner sleeve or the second inner sleeve is more durable.
Furthermore, the materials for manufacturing the first inner sleeve and the second inner sleeve also comprise 2-3 parts of polyethylene wax powder. The heat resistance and the wear resistance of the whole first inner sleeve or the whole second inner sleeve are improved, and the service life of the first inner sleeve or the second inner sleeve is prolonged.
Further, the materials for manufacturing the first inner sleeve and the second inner sleeve respectively comprise the following components in parts by weight: 94-96 parts of epoxy resin powder, 81-83 parts of polyvinyl chloride powder, 30-34 parts of aluminum hydroxide powder, 26-29 parts of iron powder, 41-42 parts of maleic anhydride powder, 9.9-10.3 parts of asphalt, 65-70 parts of silicon dioxide powder, 0.2-0.6 part of an organic silicon defoamer, 4.9-5.3 parts of straw powder and 2.2-2.6 parts of polyethylene wax powder. The first inner sleeve or the second inner sleeve with better quality can be manufactured by the above proportion.
Further, the materials for manufacturing the first inner sleeve and the second inner sleeve respectively comprise the following components in parts by weight: 96 parts of epoxy resin powder, 82 parts of polyvinyl chloride powder, 32 parts of aluminum hydroxide powder, 28 parts of iron powder, 41 parts of maleic anhydride powder, 10.2 parts of asphalt, 66 parts of silicon dioxide powder, 0.3 part of an organic silicon defoamer, 5.1 parts of straw powder and 2.4 parts of polyethylene wax powder. The first inner sleeve or the second inner sleeve manufactured by the method has better quality.
Furthermore, a first sliding block is connected in the first outer sleeve in a sliding mode, a first spring is connected between the first sliding block and the bottom wall of the first outer sleeve, a first embedding groove used for embedding the first sliding block is formed in the first inner sleeve, a second sliding block is connected in the second outer sleeve in a sliding mode, a second spring is connected between the second sliding block and the second outer sleeve, and a second embedding groove used for embedding the second sliding block is formed in the second inner sleeve. When the first inner sleeve is arranged in the first outer sleeve, the first embedding groove is aligned to the first sliding block, an operator pushes the first inner sleeve forcibly, when the first inner sleeve is embedded in the first outer sleeve, the first sliding block is also embedded in the first embedding groove, and the first spring generates certain tensioning force on the first inner sleeve, so that the first inner sleeve is fixed in the first outer sleeve more stably; the second inner sleeve is installed in the same way as the first inner sleeve.
Further, still include the support, it is on the support to go up the equal sliding connection of mould and lower mould, it is located the lower mould top to go up the mould, be fixed with the piston cylinder on the support, sliding connection has the piston in the piston cylinder, be connected with the third spring between piston and the piston cylinder bottom, the piston upside is fixed with the piston rod, first overcoat and piston rod fixed connection, it has the spout to open in the second overcoat, sliding connection has the guide bar in the spout, be connected with the fourth spring between guide post and the spout diapire, be fixed with the guide block on the first overcoat, it has the guiding hole to open on the guide block, the guide post is used for. After the upper die and the lower die are installed on the support, the upper die is pushed downwards, the upper die drives the piston rod to move downwards, the piston rod drives the piston to slide in the piston cylinder, gas in the piston cylinder is pushed to flow into the sliding groove, the air pressure in the sliding groove rises, the gas pushes the guide rod to slide upwards, the first outer sleeve drives the guide block to slide downwards, the guide rod is inserted into the guide hole of the guide block, the guide effect on the movement of the upper die and the lower die is achieved, and the upper die and the lower die are enabled to be aligned together more accurately.
Furthermore, a double-faced wedge rod is connected in the first outer sleeve in a sliding mode, a first wedge surface is formed in the first inner sleeve, the first inner sleeve abuts against one end of the double-faced wedge rod through the first wedge surface, a fifth spring is connected between the double-faced wedge rod and the outer wall of the first outer sleeve, a second wedge surface is formed in the top end of the guide column, and the guide column abuts against the other end of the double-faced wedge rod through the second wedge surface. The guide post penetrates through the guide hole to continuously slide upwards, the guide post abuts against the double-faced wedge rod through the second wedge surface, the guide post pushes the double-faced wedge rod to slide towards the direction close to the first inner sleeve, the double-faced wedge rod abuts against the first inner sleeve, the first inner sleeve and the second inner sleeve are closed tightly, and injection molding materials are prevented from leaking out of a gap between the first inner sleeve and the second inner sleeve during injection molding.
Furthermore, a wedge rod is fixed on the lower side of the piston and penetrates through the bottom of the piston cylinder, a screw rod is arranged on the second outer sleeve in a clearance fit mode, a gear is connected to the support in a rotating mode and is in threaded connection with the gear, the gear is meshed with a rack, a third wedge surface is arranged at one end, close to the wedge rod, of the rack, the wedge rod is used for abutting against the third wedge surface of the rack, and a sixth spring is connected between the rack and the support. When the piston moves downwards, the piston drives the wedge rod to move downwards, the wedge rod also abuts against the rack when the guide column abuts against the double-sided wedge rod, the wedge rod also pushes the rack to slide, the rack drives the gear to rotate, the gear drives the screw to slide, and the screw tightly abuts against the second inner channel, so that the first inner sleeve and the second inner sleeve are in butt joint without a gap, and injection molding materials are prevented from leaking.
Drawings
FIG. 1 is a schematic view of a stirring apparatus used in fabricating a modular injection mold in an embodiment of the modular injection mold of the present invention;
FIG. 2 is a schematic view of an embodiment of a modular injection mold of the present invention;
fig. 3 is a schematic view of the upper die of fig. 2.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the stirring device comprises a frame 1, a stirring box 2, a hollow stirring shaft 3, a rotating shaft 4, stirring blades 5, a sliding chute 6, a stirring rod 7, a vacuum pump 8, a seventh spring 9, a fourth gear 10, a third gear 11, a second bevel gear 12, a first bevel gear 13, a second gear 14, a first gear 15, a cylindrical cam 16, a first bearing frame 17, a push rod 18, an eighth spring 19, a driving cam 20, a sliding rod 21, a second bearing frame 22, a first piston 23, a ninth spring 24, a bracket 25, a second outer sleeve 26, a second inner sleeve 27, a second sliding block 28, a piston cylinder 29, a third spring 30, a wedge rod 31, a second piston 32, a piston rod 33, a fourth spring 34, a guide column 35, a first outer sleeve 36, a first inner sleeve 37, a first sliding block 38, a guide block 39, a guide hole 40, a double-sided wedge rod 41, a fifth spring 42, a first spring 43, a second spring 44, a rack screw 45, gears 46, 47, And a sixth spring 48.
The relevant data in the examples are shown in table 1:
table 1: unit (kg)
| Practice of Example (b) | Epoxy resin Powder of | Polyvinyl chloride Powder of | Aluminum hydroxide Powder of | Iron Powder | Maleic anhydride Powder of | Leaching Green leaf of Chinese cabbage | Silicon dioxide Powder of | Organosilicon eliminating agent Foaming agent | Straw powder Powder | Polyethylene wax Powder of |
| 1 | 90 | 80 | 20 | 25 | 40 | 9.7 | 60 | 0.1 | 4.4 | 2 |
| 2 | 94 | 81 | 30 | 26 | 41 | 9.9 | 65 | 0.2 | 4.9 | 2.2 |
| 3 | 96 | 82 | 32 | 28 | 41 | 10. 2 | 66 | 0.3 | 5.1 | 2.4 |
| 4 | 96 | 83 | 34 | 29 | 42 | 10. 3 | 70 | 0.6 | 5.3 | 2.6 |
| 5 | 100 | 85 | 40 | 30 | 45 | 10. 6 | 80 | 1 | 6.2 | 3 |
Taking example 3 as an example, a method for manufacturing a combined injection mold is described, which comprises the following steps: a stirring device is needed, as shown in figure 1, the stirring device comprises a frame 1, a stirring box 2 is fixed on the frame 1, electric heating wires are installed in the wall of the stirring box 2, a vacuum pump 8 is communicated on the stirring box 2, a transverse hollow stirring shaft 3 is rotationally connected in the stirring box 2, eight sliding chutes 6 are evenly distributed on the hollow stirring shaft 3, the eight sliding chutes 6 are communicated with the cavity of the hollow stirring shaft 3, a stirring rod 7 is slidably connected in each sliding chute 6, a seventh spring 9 is connected between the stirring rod 7 and the shaft wall of the hollow stirring shaft 3, a vertical rotating shaft 4 is in clearance fit in the stirring box 2, stirring blades 5 are flatly connected on the rotating shaft 4, the stirring blades 5 are positioned in the stirring box 2, a first gear 15 is connected on the rotating shaft 4 through splines, a first bearing frame 17 which vertically slides is connected on the frame 1, and an eighth spring 19 is connected between the first bearing frame 17 and the frame 1, a first bearing is arranged on a first bearing frame 17, the lower end of a rotating shaft 4 is rotatably connected in the first bearing, a second gear 14 is meshed with a first gear 15, the second gear 14 is coaxially connected with a cylindrical cam 16, a push rod 18 is welded on the first bearing frame 17, the push rod 18 is abutted against the cylindrical cam 16, a driving cam 20 is coaxially connected with a second gear 14, the driving cam 20 is abutted against a sliding rod 21, the sliding rod 21 is transversely and slidably connected on a machine frame 1, the sliding rod 21 is abutted against a second bearing frame 22, a ninth spring 24 is connected between the second bearing frame 22 and the machine frame 1, a first piston 23 is slidably connected in a hollow stirring shaft 3, a first piston 23 rod is welded on the first piston 23, a second bearing is arranged on the second bearing frame 22, the first piston 23 rod is rotatably connected in the second bearing, a first bevel gear 13 is coaxially connected with the second gear 14, a second bevel gear 12 is meshed with the first bevel gear 13, the second bevel gear 12 is coaxially connected with a third gear 11, the third gear 11 is meshed with a fourth gear 10, the fourth gear 10 is in plain key connection with the hollow stirring shaft 3, a motor is fixed on the rack 1, and an output shaft of the motor is in plain key connection with the third gear 11;
(1) manufacturing a coat: forging the first outer sleeve and the second outer sleeve of the injection mold in a forging machine by using alloy steel;
(2) weighing: weighing 96kg of epoxy resin powder, 82kg of polyvinyl chloride powder, 32kg of aluminum hydroxide powder, 28kg of iron powder, 41 kg of maleic anhydride powder, 10.2kg of asphalt, 66kg of silicon dioxide powder, 0.3kg of organic silicon defoamer, 5.1kg of straw powder and 2.4kg of polyethylene wax powder by using an electronic scale;
(3) melting: pouring 96kg of epoxy resin powder, 82kg of polyvinyl chloride powder and 41 kg of maleic anhydride powder into the stirring box 2, electrifying the heating wire to ensure that the temperature in the stirring box 2 is 82 ℃, and uniformly melting the epoxy resin powder, the polyvinyl chloride powder and the maleic anhydride powder;
(4) adding materials: adding 5.1kg of straw powder, 2.4kg of polyethylene wax powder and 66kg of silicon dioxide powder into the stirring box 2, and increasing the temperature of the stirring box 2 to 91 ℃;
(5) blending: 10.2kg of asphalt is added into the stirring box 2, the vacuum pump 8 and the motor are started, the vacuum pump 8 makes the stirring box 2 in a vacuum state, the motor drives the third gear 11 to rotate, the third gear 11 drives the fourth gear 10 to rotate, the fourth gear 10 drives the hollow stirring shaft 3 to rotate, the hollow stirring shaft 3 drives the chute 6 to rotate, the chute 6 drives the stirring rod 7 to rotate, the stirring rod 7 stirs the material, the third gear 11 also drives the second bevel gear 12 to rotate, the second bevel gear 12 drives the first bevel gear 13 to rotate, the first bevel gear 13 drives the second gear 14 to rotate, the second gear 14 drives the first gear 15 to rotate, the first gear 15 drives the stirring blade 5 to rotate, the stirring blade 5 also stirs the material, the second gear 14 also drives the cylindrical cam 16 and the driving cam 20 to rotate, the cylindrical cam 16 and the ejector rod 18 form a cam pair, the cylindrical cam 16 drives the ejector rod 18 to reciprocate, The lower sliding part, the mandril 18 drives the first bearing frame 17 to slide in a reciprocating way, so that the rotating shaft 4 drives the stirring blade 5 to slide in a reciprocating way in the stirring box 2, the stirring blade 5 rotates and stirs materials in a sliding way, the stirring effect is improved, the materials are stirred more evenly, the driving cam 20 and the slide rod 21 form a cam pair, the driving cam 20 drives the slide rod 21 to slide in a left-right reciprocating way, the slide rod 21 drives the second bearing frame 22 to slide, the second bearing frame 22 drives the first piston 23 to slide in a reciprocating way in the cavity of the hollow stirring shaft 3 through the first piston 23, so that the air pressure in the hollow stirring shaft 3 is continuously and alternately increased and reduced, the stirring rod 7 slides in the sliding groove 6 in a reciprocating way, the stirring rod 7 rotates and stirs the materials in a sliding way, the stirring effect is improved, the materials are further stirred more evenly, and after 10min of stirring, the vacuum pump 8 and the motor are turned off;
(6) stirring: adding 32kg of aluminum hydroxide powder, 28kg of iron powder and 0.3kg of organic silicon defoaming agent, starting the vacuum pump 8 and the motor, stirring the materials by using the stirring blade 5 and the stirring rod 7 under vacuum, stirring for 1 hour, and then turning off the motor;
(7) and (3) heat preservation: raising the temperature of the electric heating wire to 105 ℃, and preserving the heat for 2.5 hours to obtain a mixed solution;
(8) pouring: pouring the obtained mixed solution into a mold, and molding the mixed solution in the mold to obtain a first inner sleeve and a second inner sleeve of the injection mold;
(9) combining: as shown in fig. 2 and 3, a first slide block 38 is slidably connected to a manufactured first outer sleeve 36, a first spring 43 is welded between the first slide block 38 and the bottom wall of the first outer sleeve 36, after the first inner sleeve 37 is molded, an embedding groove is formed at the bottom of the first inner sleeve 37, the manufactured first inner sleeve 37 of the injection mold is embedded into the first outer sleeve 36 of the injection mold, when the first inner sleeve 37 is installed in the first outer sleeve 36, the first embedding groove is aligned with the first slide block 38, an operator forcibly pushes the first inner sleeve 37, when the first inner sleeve 37 is embedded in the first outer sleeve 36, the first slide block 38 is also embedded into the first embedding groove, and the first spring 43 generates a certain tension to the first inner sleeve 37, so that the first inner sleeve 37 is more stably fixed in the first outer sleeve 36, and an upper mold is obtained; a second sliding block 28 is connected in a sliding manner in the manufactured second outer sleeve 26, a second spring 44 is welded between the second sliding block 28 and the bottom wall of the second outer sleeve 26, after the second inner sleeve 27 is molded, an embedding groove is formed at the bottom of the second inner sleeve 27, the manufactured second inner sleeve 27 of the injection mold is embedded into the second outer sleeve 26 of the injection mold, when the second inner sleeve 27 is installed in the second outer sleeve 26, the second embedding groove is aligned to the second sliding block 28, an operator pushes the second inner sleeve 27 with force, when the second inner sleeve 27 is embedded into the second outer sleeve 26, the second sliding block 28 is also embedded into the second embedding groove, and the second spring 44 generates a certain tensile force on the first inner sleeve 37, so that the second inner sleeve 27 is fixed in the second outer sleeve 26 more stably, and a lower mold is obtained; then, the upper die and the lower die are connected on the bracket 25 in a sliding way, the upper piston cylinder 29 is fixed on the bracket 25 through a bolt, a through hole for the wedge rod 31 to pass through is arranged at the bottom of the piston cylinder 29, a piston rod 33 and the wedge rod 31 are welded on a second piston 32 in the piston cylinder 29, a third spring 30 is welded between the second piston 32 and the piston cylinder 29, the piston rod 33 is welded on a first outer sleeve 36, a double-faced wedge rod 41 passes through a sliding hole is arranged on the first outer sleeve 36, a first wedge surface is arranged at the bottom of the first inner sleeve 37, the double-faced wedge rod 41 is inserted into the sliding hole, the wedge surface at the right end of the double-faced wedge rod 41 is abutted against the first inner sleeve 37, a fifth spring 42 is welded between the double-faced wedge rod 41 and the first outer sleeve 36, a sliding groove is arranged on the second outer sleeve 26, a guide column 35 is inserted into the sliding groove, and a fourth spring 34 is welded between the guide column 35 and the bottom wall of the sliding, welding a guide block 39 on the outer wall of the first outer sleeve 36, forming a guide hole 40 for the guide column 35 to pass through on the guide block 39, forming a second wedge surface on the guide column 35, and mounting the upper die and the lower die on the bracket 25; and (3) rotatably connecting a gear 46 to the bracket 25, slidably connecting a rack 47 engaged with the gear 46, welding a sixth spring 48 between the rack 47 and the bracket 25, forming a third wedge surface at the right end of the rack 47 for abutting against the wedge rod 31, forming a threaded hole in the gear 46, connecting a screw 45 to the threaded hole in an internal thread manner, forming a clearance hole at the bottom of the second outer sleeve 26, and abutting the screw 45 against the bottom of the second inner sleeve 27 through the clearance hole, thus obtaining the combined injection mold.
When the combined injection mold is used, the upper mold is pushed downwards, the upper mold drives the piston rod 33 to move downwards, the piston rod 33 drives the second piston 32 to slide in the piston cylinder 29, the second piston 32 pushes gas in the piston cylinder 29 to flow into the chute, the air pressure in the chute is increased, the gas pushes the guide rod to slide upwards, the first outer sleeve 36 drives the guide block 39 to slide downwards, the guide rod is inserted into the guide hole 40 of the guide block 39 to play a role in guiding the movement of the upper mold and the lower mold, so that the upper mold and the lower mold are more accurately aligned together, the guide post 35 passes through the guide hole 40 to continuously slide upwards, the guide post 35 abuts against the double-faced wedge rod 41 through the second wedge face, the guide post 35 pushes the double-faced wedge rod 41 to slide towards the direction close to the first inner sleeve 37, the double-faced wedge rod 41 abuts against the first inner sleeve 37, so that the first inner sleeve 37 is aligned with the second inner sleeve 27 more tightly, when the injection molding is prevented, the injection molding material leaks out from a gap between the first inner sleeve 37 and the second inner sleeve 27, when the second piston 32 moves downwards, the second piston 32 drives the wedge rod 31 to move downwards, the wedge rod 31 also abuts against the rack 47 while the guide post 35 abuts against the double-faced wedge rod 41, the wedge rod 31 also pushes the rack 47 to slide, the rack 47 drives the gear 46 to rotate, the gear 46 drives the screw 45 to slide, and the screw 45 abuts against the second inner channel, so that no gap exists between the first inner sleeve 37 and the second inner sleeve 27 in a matching manner, and the injection molding material is prevented from leaking.
Examples 1-2, 4-5 differ from example 3 by the change of the respective parameters as shown in table 1.
Comparative example 1 is a cured epoxy resin provided in the background art of chinese invention patent application No. 201310438168.6, and a first inner jacket or a second inner jacket made of the cured epoxy resin.
The strength and impact strength of the first inner jacket or the second inner jacket manufactured in examples 1 to 5 and comparative example 1 above were compared as shown in table 2:
table 2:
| strength (kg/cm 2) | Impact strength (kgcm/cm 2) | |
| Example 1 | 32.65 | 23.56 |
| Example 2 | 33.96 | 24.69 |
| Example 3 | 35.66 | 25.12 |
| Example 4 | 32.12 | 22.52 |
| Example 5 | 30.23 | 20.45 |
| Comparative example 1 | 28.80 | 18.60 |
The results in table 2 show that the strength and impact strength of the first inner sleeve or the second inner sleeve manufactured by the combined injection mold of the invention are much higher than those of the first inner sleeve or the second inner sleeve of comparative example 1, and the strength and impact resistance of the manufactured first inner sleeve or the second inner sleeve are obviously enhanced by the scheme of the invention, so that the manufactured non-metal first inner sleeve or the manufactured non-metal second inner sleeve is not easy to damage.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. Modular injection mold, including last mould and lower mould, go up the mould and include first endotheca and first overcoat, the lower mould includes second endotheca and second overcoat, its characterized in that, first endotheca is inlayed in first overcoat, and the second endotheca is inlayed in the second overcoat, and the material of preparation first endotheca and second endotheca all includes the component of following parts by weight: 90-100 parts of epoxy resin powder, 80-85 parts of polyvinyl chloride powder, 20-40 parts of aluminum hydroxide powder, 25-30 parts of iron powder, 40-45 parts of maleic anhydride powder, 9.7-10.6 parts of asphalt and 60-80 parts of silicon dioxide powder;
the first outer sleeve is connected with a first sliding block in a sliding mode, a first spring is connected between the first sliding block and the bottom wall of the first outer sleeve, a first embedding groove used for embedding the first sliding block is formed in the first inner sleeve, a second sliding block is connected in the second outer sleeve in a sliding mode, a second spring is connected between the second sliding block and the second outer sleeve, and a second embedding groove used for embedding the second sliding block is formed in the second inner sleeve; the upper die and the lower die are both connected to the support in a sliding mode, the upper die is located above the lower die, a piston cylinder is fixed on the support, a piston is connected in the piston cylinder in a sliding mode, a third spring is connected between the piston and the bottom of the piston cylinder, a piston rod is fixed on the upper side of the piston, a first outer sleeve is fixedly connected with the piston rod, a sliding groove is formed in a second outer sleeve, a guide post is connected in the sliding groove in a sliding mode, a fourth spring is connected between the guide post and the bottom wall of the sliding groove, a guide block is fixed on the first outer sleeve, a guide hole is formed in the guide; the first outer sleeve is internally and slidably connected with a double-faced wedge rod, a first wedge surface is arranged on the first inner sleeve, the first inner sleeve is abutted against one end of the double-faced wedge rod through the first wedge surface, a fifth spring is connected between the double-faced wedge rod and the outer wall of the first outer sleeve, a second wedge surface is arranged at the top end of the guide column, and the guide column is abutted against the other end of the double-faced wedge rod through the second wedge surface; a wedge rod is fixed on the lower side of the piston, penetrates through the bottom of the piston cylinder, a screw rod is arranged in a clearance fit mode of the second outer sleeve, a gear is connected to the support in a rotating mode, the screw rod is in threaded connection with the gear, the gear is meshed with a rack, a third wedge surface is arranged at one end, close to the wedge rod, of the rack, the wedge rod is used for abutting against the third wedge surface of the rack, and a sixth spring is connected between the rack and the support.
2. The modular injection mold of claim 1, wherein: the materials for manufacturing the first inner sleeve and the second inner sleeve also comprise 0.1-1 part of organic silicon defoaming agent.
3. The modular injection mold of claim 2, wherein: the materials for manufacturing the first inner sleeve and the second inner sleeve also comprise 4.4-6.2 parts of straw powder.
4. The modular injection mold of claim 3, wherein: the materials for manufacturing the first inner sleeve and the second inner sleeve also comprise 2-3 parts of polyethylene wax powder.
5. The modular injection mold of claim 4, wherein: the materials for manufacturing the first inner sleeve and the second inner sleeve respectively comprise the following components in parts by weight: 94-96 parts of epoxy resin powder, 81-83 parts of polyvinyl chloride powder, 30-34 parts of aluminum hydroxide powder, 26-29 parts of iron powder, 41-42 parts of maleic anhydride powder, 9.9-10.3 parts of asphalt, 65-70 parts of silicon dioxide powder, 0.2-0.6 part of an organic silicon defoamer, 4.9-5.3 parts of straw powder and 2.2-2.6 parts of polyethylene wax powder.
6. The modular injection mold of claim 5, wherein: the materials for manufacturing the first inner sleeve and the second inner sleeve respectively comprise the following components in parts by weight: 96 parts of epoxy resin powder, 82 parts of polyvinyl chloride powder, 32 parts of aluminum hydroxide powder, 28 parts of iron powder, 41 parts of maleic anhydride powder, 10.2 parts of asphalt, 66 parts of silicon dioxide powder, 0.3 part of an organic silicon defoamer, 5.1 parts of straw powder and 2.4 parts of polyethylene wax powder.
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| CN117183207B (en) * | 2023-06-15 | 2024-04-30 | 东莞市信东橡塑五金制品有限公司 | Processing die for producing automobile sealing strips |
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