Silicone rubber injection molding mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a silicone rubber injection molding mold which comprises a base, a lower mold assembly is mounted at the top of the base, an upper mold assembly is arranged above the lower mold assembly, and two driving cylinders for driving the upper mold assembly to move are further mounted on the base. The two driving air cylinders are arranged on the two sides of the lower mold assembly correspondingly, a demolding assembly used for assisting demolding of a finished product is further arranged in the lower mold assembly, and the top of the demolding assembly sequentially penetrates through the lower mold assembly and the upper mold assembly and extends into the upper mold assembly. According to the device, through cooperation of the driving air cylinder and the electric push rod, whole-process automatic operation from mold closing, injection molding, demolding to waste material cutting is achieved, labor cost is greatly saved, production efficiency is remarkably improved, meanwhile, interference of human factors is reduced through the automatic process, high consistency can be kept in each time of injection molding, and the production efficiency is improved. Therefore, the stability of the product quality is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is a kind of silicone rubber injection molding mold. BACKGROUND

[0002] Silicone rubber product is with methyl vinyl silicone rubber as base glue, join various fillers and be made into product by mixing, filtering, adding sulfur, moulding etc. multiple processes, and silicone rubber product has excellent flexibility and elasticity, can withstand large deformation without breaking, is widely used in various fields, and injection molding is an important process for manufacturing silicone rubber, and injection molding process is to inject heated silicone rubber raw material into mold through the nozzle of injection molding machine, and after cooling and solidification, the silicone rubber product of required shape is obtained;

[0003] Because there is a certain gap between the upper and lower molds of injection mold, during processing, raw materials will inevitably overflow through the gap, and after solidification, a ring of flash will be formed around the finished product, which needs to be manually removed after the finished product is removed, which is more troublesome, and because the waste material is closely connected with the finished product, any carelessness during cutting process may damage the finished product, resulting in a decrease in product qualification rate, and also increasing production and labor costs. UTILITARIAN CONTENT

[0004] The utility model aims at providing a kind of silicone rubber injection molding mold to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of silicone rubber injection molding mold, including base, the top of the base is equipped with lower die assembly, the upper side of the lower die assembly is provided with upper die assembly, the base is also equipped with two driving air cylinders for driving upper die assembly to move, and two driving air cylinders are respectively arranged at the two sides of lower die assembly, the lower die assembly is also provided with demolding assembly for assisting finished product demolding, and the top of demolding assembly is sequentially penetrated through lower die assembly and upper die assembly and extends into upper die assembly, the top of the base is also provided with spraying assembly, the spraying assembly is arranged at the side of lower die assembly, and the discharge end of spraying assembly faces lower die assembly on;

[0007] The upper die assembly is also provided with cutting assembly for cutting waste material, and the extension end of demolding assembly is connected with cutting assembly in upper die assembly.

[0008] Preferably, the lower die assembly comprises a lower die body fixedly installed on the base, a forming cavity is formed in the top of the lower die body, the stripper assembly is slidably connected in the forming cavity, and two injection ports for conveying raw materials are formed in the front end of the lower die body and communicated with the forming cavity.

[0009] Preferably, the upper die assembly comprises a support plate, the bottom of the support plate is fixedly connected with an upper die body, the bottom of the upper die body is slidably connected with a mold core, the top of the mold core is fixedly connected with two sliding rods, the ends of the two sliding rods away from the mold core penetrate the upper die body and the support plate in sequence and extend to the outside of the support plate, the top of the two sliding rods is fixedly connected with a limiting plate, and the cutting assembly is arranged in the upper die body.

[0010] Preferably, the cutting assembly comprises a cutter, the cutter is slidably arranged outside the mold core, the top of the cutter is fixedly connected with a connecting frame, the top of the connecting frame is fixedly connected with two electric push rods, the top of the two electric push rods is fixedly connected with a connecting plate, the connecting frame and the connecting plate are slidably arranged in the upper die body, and the bottom of the upper die body is further provided with two sliding grooves for the sliding of the stripper assembly, the top of the stripper assembly extends into the upper die body through the sliding grooves and is fixedly connected with the bottom of the connecting plate.

[0011] Preferably, the stripper assembly comprises a synchronous frame, the top of the synchronous frame is fixedly connected with the bottom of the connecting plate, a pushing rod is fixedly connected to the synchronous frame, the pushing rod is slidably arranged in the lower die body, the top of the pushing rod is fixedly connected with a top plate, the top plate is clamped to the bottom of the forming cavity, a reset spring is further sleeved on the pushing rod, one end of the reset spring is fixedly connected with the pushing rod, and the other end is fixedly connected with the bottom of the lower die body.

[0012] Preferably, the spraying assembly comprises two support frames, the two support frames are arranged on the top of the base, the two support frames are arranged at the two ends of the lower die body, a transmission screw is rotatably connected between the two support frames, a servo motor is further arranged on one of the support frames, the output end of the servo motor is fixedly connected with the transmission screw through a shaft coupling, an auxiliary rod is further arranged between the two support frames, a sliding box is threadedly connected on the transmission screw, one end of the sliding box close to the nozzle is slidably connected with the nozzle, and the nozzle is arranged on the side of the sliding box close to the lower die body and communicated with the sliding box.

[0013] The spraying assembly further comprises a release agent storage tank, the liquid outlet end of the release agent storage tank is communicated with a communication pipe, and the other end of the communication pipe is communicated with the sliding box.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1. The utility model discloses when using, after injection moulding, through the starting electric push rod and push cutter down, can accurate cutting of the waste around the mould core, simultaneously this process, the mould core still keeps with the mould cavity's combined die state, effectively avoided the damage of finished product when cutting waste, this design not only improved the cutting efficiency of waste, also ensured the integrity of finished product.

[0016] 2. The utility model discloses through the linkage of connecting plate and upper mould body, realized the up and down movement of the roof, when the mould core and the mould cavity separate, the roof can quickly eject finished product from the mould cavity, completes the demoulding operation, this design not only simplifies the demoulding process, also improved the efficiency and accuracy of demoulding.

[0017] 3. The utility model discloses when using, after completing once injection moulding, through servo motor drive transmission screw rod rotation, can make the sliding box drive the nozzle along transmission screw rod sliding, even spraying the demoulding agent in the mould cavity, this process not only prepared for next time injection moulding, also effectively prolonged the service life of mould, and the even spraying of demoulding agent reduced the adhesion between mould and silicone rubber, made the demoulding process more smooth.

[0018] 4. The utility model discloses through the cooperation of drive cylinder and electric push rod, realized the whole process automation operation from combined die, injection moulding, demoulding to waste cutting, this not only greatly saved the manpower cost, also improved the production efficiency significantly, simultaneously, the automatic process reduced the interference of human factor, made every injection moulding can keep high consistency, thereby guaranteed the stability of product quality. ACCURACY

[0019] Figure 1 It is the first visual angle schematic drawing of the utility model;

[0020] Figure 2 It is the structure schematic drawing of lower mould assembly in the utility model;

[0021] Figure 3 It is the structure schematic drawing on lower mould body in the utility model;

[0022] Figure 4 It is the structure schematic drawing of upper mould assembly in the utility model;

[0023] Figure 5 It is the partial structure schematic drawing of upper mould assembly and demoulding assembly in the utility model;

[0024] Figure 6 It is the second visual angle schematic drawing of the utility model;

[0025] Figure 7 It is the structure schematic drawing of spraying assembly in the utility model.

[0026] In the figure: 1, base; 11, drive cylinder; 2, lower mold assembly; 21, lower mold body; 22, forming cavity; 23, injection port; 3, upper mold assembly; 31, support plate; 32, upper mold body; 33, sliding rod; 34, mold core; 35, sliding groove; 36, cutter; 37, connecting frame; 38, electric push rod; 39, connecting plate; 4, spraying assembly; 41, support frame; 42, servo motor; 43, transmission screw; 44, auxiliary rod; 45, sliding box; 46, spray head; 47, release agent storage box; 48, communication pipe; 5, release assembly; 51, synchronization frame; 52, pushing rod; 53, top plate; 54, return spring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0028] Embodiment one, please refer to Figures 1-7 A silicone rubber injection molding mold, including base 1, the top of base 1 is equipped with lower mold assembly 2, the top of lower mold assembly 2 is provided with upper mold assembly 3, two drive cylinders 11 for driving upper mold assembly 3 to move are also installed on base 1, and the two drive cylinders 11 are respectively arranged on the two sides of lower mold assembly 2, release assembly 5 for assisting the demolding of finished product is also arranged in lower mold assembly 2, and the top of release assembly 5 successively penetrates lower mold assembly 2 and upper mold assembly 3 and extends into upper mold assembly 3, spraying assembly 4 is also arranged on the top of base 1, spraying assembly 4 is arranged on one side of lower mold assembly 2, and the discharge end of spraying assembly 4 faces lower mold assembly 2, cutting assembly for cutting waste material is also arranged in upper mold assembly 3, the extension end of release assembly 5 is connected with cutting assembly in upper mold assembly 3, lower mold assembly 2 includes lower mold body 21, lower mold body 21 is fixedly installed on base 1, forming cavity 22 is formed in the top of lower mold body 21, release assembly 5 is slidingly connected in forming cavity 22, two injection ports 23 for conveying raw materials are formed in the front end of lower mold body 21, and the two injection ports 23 are communicated with forming cavity 22, upper mold assembly 3 includes support plate 31, support plate 31 is fixedly connected with upper mold body 32 at the bottom, upper mold body 32 is slidingly connected with mold core 34 at the bottom, two sliding rods 33 are fixedly connected with mold core 34 at the top, the two ends of the two sliding rods 33 away from mold core 34 successively penetrate upper mold body 32 and support plate 31 and extend to the outside of support plate 31, limit plates are installed at the top of the two sliding rods 33, and cutting assembly is arranged in upper mold body 32.

[0029] In use, first start the drive cylinder 11, make the drive cylinder 11 drive the support plate 31 to move, make the upper die body 32 with the lower die body 21 close, after closing, the mold core 34 and the forming cavity 22 form the model cavity, through the injection port 23 to the raw material is transported to the model cavity in the forming;

[0030] After the raw material is formed, the drive cylinder 11 is started again, the drive cylinder 11 drives the support plate 31 to move upwards, when the support plate 31 moves upwards, the support plate 31 drives the upper die body 32 to move upwards along the sliding rod 33, so that the upper die body 32 is separated from the lower die body 21, at this time, the mold core 34 slides in the upper die body 32 and is not separated from the forming cavity 22, because the upper die body 32 has been separated from the lower die body 21, the overflow during injection can be exposed, when the support plate 31 drives the upper die body 32 to move to the limit plate at the top of the sliding rod 33, the drive cylinder 11 is closed, so that the support plate 31 and the upper die body 32 are fixed;

[0031] Start the cutting assembly in the upper die body 32, make the cutting assembly move downwards along the mold core 34, cut off the excess waste material around the finished product;

[0032] After cutting, the drive cylinder 11 is continuously started, at this time, the support plate 31 abuts against the limit plate on the sliding rod 33, and the mold core 34 is synchronously moved upwards through the sliding rod 33, so that the mold core 34 is separated from the forming cavity 22;

[0033] When the support plate 31 and the upper die body 32 continue to move upwards, the demolding assembly 5 is moved at the same time, so that the demolding assembly 5 ejects the product in the forming cavity 22, the worker can take out the ejected finished product together with the waste material.

[0034] Embodiment two, please refer to Figures 1-6 , the cutting assembly includes a cutter 36, the cutter 36 is slidably arranged outside the mold core 34, the top of the cutter 36 is fixedly connected with a connecting frame 37, the top of the connecting frame 37 is fixedly connected with two electric push rods 38, the top of the two electric push rods 38 is fixedly connected with a connecting plate 39, the connecting frame 37 and the connecting plate 39 are slidably arranged in the upper die body 32, the bottom of the upper die body 32 is also provided with two sliding grooves 35 for the sliding of the demolding assembly 5, the top of the demolding assembly 5 extends into the upper die body 32 through the sliding grooves 35 and is fixedly connected with the bottom of the connecting plate 39, the demolding assembly 5 includes a synchronous frame 51, the top of the synchronous frame 51 is fixedly connected with the bottom of the connecting plate 39, the synchronous frame 51 is fixedly connected with a pushing rod 52, the pushing rod 52 slides in the lower die body 21, the top of the pushing rod 52 is fixedly connected with a top plate 53, the top plate 53 is clamped to the bottom of the forming cavity 22, the pushing rod 52 is further sleeved with a reset spring 54, one end of the reset spring 54 is fixedly connected with the pushing rod 52, and the other end is fixedly connected with the bottom of the lower die body 21;

[0035] Since the connecting frame 37 and the connecting plate 39 are slidingly arranged in the upper die body 32, after the product is formed, when the support plate 31 drives the upper die body 32 to move upwards, the connecting frame 37 and the connecting plate 39 slide in the upper die body 32 from the top of the upper die body 32 towards the bottom of the upper die body 32, so that the connecting frame 37 drives the cutter 36 to extend from the bottom of the upper die body 32, when the support plate 31 and the upper die body 32 stop moving, the trimming is performed, the electric push rod 38 is started, the output end of the electric push rod 38 drives the connecting frame 37 to move downwards, the connecting frame 37 drives the cutter 36 to move downwards, and the waste material around the mold core 34 is cut off, at this time, the mold core 34 still keeps the combined state with the forming cavity 22, so that the product is prevented from being damaged when the waste material is cut off;

[0036] When the waste material is cut off, the cutter 36 is retracted by starting the electric push rod 38, and the support plate 31 and the upper die body 32 drive the mold core 34 to move upwards under the action of the sliding rod 33, so that the mold core 34 is separated from the forming cavity 22, since the connecting frame 37 and the connecting plate 39 have moved to the lowest end in the upper die body 32 at this time, the upper die body 32 is moved upwards again, so that the connecting plate 39 drives the synchronous frame 51 to move upwards, the synchronous frame 51 drives the top plate 53 to move out of the forming cavity 22 through the pushing rod 52, and the product in the forming cavity 22 is demolded and ejected;

[0037] When the product is taken out, the support plate 31 and the upper die body 32 are slightly moved downwards by starting the driving cylinder 11 again, the synchronous frame 51 is moved downwards under the action of the elastic force of the reset spring 54, the top plate 53 is moved downwards from the forming cavity 22, and the top plate 53 is reset.

[0038] Example three, please refer to Figure 1 、 Figure 6 and Figure 7 The spraying assembly 4 comprises two support frames 41, the two support frames 41 are both mounted on the top of the base 1, and the two support frames 41 are arranged at two ends of the lower die body 21, a transmission screw rod 43 is rotatably connected between the two support frames 41, a servo motor 42 is further mounted on one of the support frames 41, the output end of the servo motor 42 is fixed with the transmission screw rod 43 through a shaft coupling, an auxiliary rod 44 is further mounted between the two support frames 41, a sliding box 45 is threadedly connected on the transmission screw rod 43, one end of the sliding box 45 close to the nozzle 46 is slidingly connected on the nozzle 46, the nozzle 46 is mounted on the side of the sliding box 45 close to the lower die body 21, and the nozzle 46 is in communication with the sliding box 45, the spraying assembly 4 further comprises a release agent storage tank 47, a communication pipe 48 is in communication with the outlet of the release agent storage tank 47, and the other end of the communication pipe 48 is in communication with the sliding box 45;

[0039] When the top plate 53 is reset, the servo motor 42 is started and the communication pipe 48 is opened, so that the communication pipe 48 conveys the release agent in the release agent storage tank 47 to the sliding box 45 and sprays the release agent in the forming cavity 22 through the spray head 46. When the servo motor 42 is started, the servo motor 42 drives the transmission screw 43 to rotate, so that the sliding box 45 drives the spray head 46 to slide along the transmission screw 43 from one side of the lower mold body 21 to the other side, so that the release agent can be uniformly sprayed in the forming cavity 22.

[0040] Working principle: in use, first start the drive cylinder 11, the drive cylinder 11 drives the support plate 31 to move, the upper mold body 32 is combined with the lower mold body 21, after the mold is combined, the mold core 34 and the forming cavity 22 form a model cavity, the raw material is conveyed into the model cavity through the injection port 23 to form;

[0041] After the raw material is formed, the drive cylinder 11 is started again to drive the support plate 31 to move upwards, when the support plate 31 moves upwards, the support plate 31 drives the upper mold body 32 to move upwards along the sliding rod 33 at the same time, so that the upper mold body 32 is separated from the lower mold body 21, at this time the mold core 34 slides in the upper mold body 32 and is not separated from the forming cavity 22, because the upper mold body 32 has been separated from the lower mold body 21, the overflow material during injection molding is exposed, when the support plate 31 drives the upper mold body 32 to move to contact the limiting plate at the top of the sliding rod 33, the drive cylinder 11 is closed, so that the support plate 31 and the upper mold body 32 are fixed;

[0042] The electric push rod 38 is started, the output end of the electric push rod 38 pushes the connecting frame 37 to move downwards, the connecting frame 37 drives the cutter 36 to move downwards, the waste material around the mold core 34 is cut off, at this time the mold core 34 still maintains the combined state with the forming cavity 22, so as to avoid damaging the finished product when cutting the waste material;

[0043] When the waste material is cut, the electric push rod 38 is started to drive the cutter 36 to retract, and the drive cylinder 11 is continued to be started, the support plate 31 and the upper mold body 32 drive the mold core 34 to move upwards under the action of the sliding rod 33, so that the mold core 34 is separated from the forming cavity 22, because the connecting frame 37 and the connecting plate 39 have moved to the lowest end in the upper mold body 32 at this time, when the upper mold body 32 moves upwards again, the connecting plate 39 will pull the synchronous frame 51 to move upwards, the synchronous frame 51 drives the top plate 53 to eject from the forming cavity 22 through the pushing rod 52, so as to eject the finished product in the forming cavity 22, when the finished product is taken out, the drive cylinder 11 is started again to drive the support plate 31 and the upper mold body 32 to move slightly downwards, under the action of the reset spring 54, the synchronous frame 51 moves downwards, so that the top plate 53 is reset;

[0044] When the top plate 53 resets, the servo motor 42 is started to drive the transmission screw 43 to rotate, so that the sliding box 45 drives the nozzle 46 to slide along the transmission screw 43 from one side of the lower mold body 21 to the other side, and the demolding agent is uniformly sprayed in the forming cavity 22, preparing for the next injection work.

[0045] It should be noted that each device in the present application is a common market device, which can be selected according to the needs during specific use, and the circuit connection relationship of each device is a simple series and parallel connection circuit, and there is no innovation point in the circuit connection part, the structure, principle and control mode are known by the technical personnel in the art through the technical manual or known through the conventional experimental method, which can be easily realized by the technical personnel in the art, and belongs to the prior art, which will not be described in detail.

[0046] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A silicone rubber injection moulding mould comprising a base (1) characterised in that: The top of the base (1) is provided with a lower mold assembly (2), the upper side of the lower mold assembly (2) is provided with an upper mold assembly (3), the base (1) is further provided with two driving cylinders (11) for driving the upper mold assembly (3) to move, and the two driving cylinders (11) are respectively arranged on the two sides of the lower mold assembly (2), the lower mold assembly (2) is further provided with a demolding assembly (5) for assisting the demolding of the finished product, and the top of the demolding assembly (5) penetrates the lower mold assembly (2) and the upper mold assembly (3) in sequence and extends into the upper mold assembly (3), the top of the base (1) is further provided with a spraying assembly (4), and the spraying assembly (4) is arranged on one side of the lower mold assembly (2) and the discharge end of the spraying assembly (4) faces the lower mold assembly (2). The upper mold assembly (3) is further provided with a cutting assembly for cutting off the waste material, and the extension end of the demolding assembly (5) is connected with the cutting assembly in the upper mold assembly (3).

2. A silicone rubber injection molding die according to claim 1, characterized in that: The lower mold assembly (2) comprises a lower mold body (21), the lower mold body (21) is fixedly installed on the base (1), the top of the lower mold body (21) is provided with a forming cavity (22), the demolding assembly (5) is slidably connected in the forming cavity (22), and the front end of the lower mold body (21) is provided with two injection ports (23) for conveying raw materials.

3. A silicone rubber injection molding die according to claim 1, characterized in that: The upper mold assembly (3) comprises a supporting plate (31), the bottom of the supporting plate (31) is fixedly connected with an upper mold body (32), the bottom of the upper mold body (32) is slidably connected with a mold core (34), the top of the mold core (34) is fixedly connected with two sliding rods (33), one end of the two sliding rods (33) away from the mold core (34) penetrates the upper mold body (32) and the supporting plate (31) in sequence and extends to the outside of the supporting plate (31), and the top of the two sliding rods (33) is respectively provided with a limiting plate, and the cutting assembly is arranged in the upper mold body (32).

4. A silicone rubber injection molding die according to claim 3, characterized in that: The cutting assembly comprises a cutter (36), the cutter (36) is slidably arranged outside the mold core (34), the top of the cutter (36) is fixedly connected with a connecting frame (37), the top of the connecting frame (37) is fixedly connected with two electric push rods (38), the top of the two electric push rods (38) is fixedly connected with a connecting plate (39), and the connecting frame (37) and the connecting plate (39) are slidably arranged in the upper mold body (32), the bottom of the upper mold body (32) is further provided with two sliding grooves (35) for sliding of the demolding assembly (5), and the top of the demolding assembly (5) extends into the upper mold body (32) through the sliding grooves (35) and is fixedly connected with the bottom of the connecting plate (39).

5. A silicone rubber injection molding die according to claim 4, characterized in that: The demolding assembly (5) comprises a synchronous frame (51), the top of the synchronous frame (51) is fixed with the bottom of the connecting plate (39), the synchronous frame (51) is fixedly connected with a pushing rod (52), the pushing rod (52) slides in the lower mold body (21), the top of the pushing rod (52) is fixedly connected with a top plate (53), the top plate (53) is clamped on the bottom of the forming cavity (22), the pushing rod (52) is further sleeved with a reset spring (54), one end of the reset spring (54) is fixed with the pushing rod (52), and the other end is fixed with the bottom of the lower mold body (21).

6. A silicone rubber injection molding die according to claim 2, characterized in that: The spraying assembly (4) comprises two support frames (41), two support frames (41) are installed on the top of the base (1), and two support frames (41) are arranged at the two ends of the lower mold body (21), two support frames (41) are rotatably connected with a transmission screw (43), one of the support frames (41) is further provided with a servo motor (42), the output end of the servo motor (42) is fixed with the transmission screw (43) through a shaft coupling, two support frames (41) are further provided with an auxiliary rod (44), the transmission screw (43) is threadedly connected with a sliding box (45), and one end of the sliding box (45) close to the nozzle (46) is slidably connected with the nozzle (46), the side of the sliding box (45) close to the lower mold body (21) is provided with a nozzle (46), and the nozzle (46) is in communication with the sliding box (45); The spraying assembly (4) further comprises a release agent storage tank (47), the liquid outlet end of the release agent storage tank (47) is communicated with a communication pipe (48), and the other end of the communication pipe (48) is in communication with the sliding box (45).

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