A precision silicone injection molding machine

Abstract

The utility model belongs to injection molding machine technical field especially relates to a kind of precision silica gel injection molding machines, it include: support, support is equipped with lower formwork;Lower formwork is equipped with mould;Lower formwork is equipped with multiple openings, each opening is equipped with corresponding and is inserted with mold closing column, each mold closing column one end is connected with upper formwork, other end is connected with base, base is located in support bottom;Mould includes lower mould body and upper mould body;Support is equipped with the first cooling assembly for the heat dissipation of lower mould body and upper mould body;Lower mould body is connected in lower formwork;Upper mould body is connected in upper formwork, upper formwork is also equipped with second cooling assembly. By setting first cooling assembly, lower mould body and upper mould body can be heat dissipated, because upper mould body is close to injection port heat high, heat dissipation is slow, by setting second cooling assembly, for the heat dissipation of upper formwork, cold quantity is transferred to upper mould body, so that lower mould body and upper mould body cooling speed are substantially same, product shrinkage is consistent, reduce scrap rate.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding machine technology, and in particular relates to a precision silicone injection molding machine. Background Technology

[0002] A vertical injection molding machine is a primary molding device that injects liquid thermoplastic or thermosetting plastic into a mold through an injection unit. The plastic cools inside the mold, thus producing plastic products of various shapes. The mold is a crucial component of the injection molding machine. The quality of the mold cooling system design is a key factor in the success of mold design, directly affecting the quality of the plastic products and production efficiency.

[0003] A cooling structure for a mold used in a vertical injection molding machine, as disclosed in CN222681677U, relates to the field of mold technology for vertical injection molding machines. The device includes an injection molding machine body. From top to bottom, the injection molding machine body is equipped with a lifting mechanism, an upper mold connected to the lifting mechanism, and a lower mold assembly mounted on the worktable of the injection molding machine body. The upper mold, under the control of the lifting mechanism, can close and release from the lower mold assembly. The lower mold assembly includes a lower mold body, a support ring, and an outer cover stacked from top to bottom. The outer cover and the lower mold body are connected by the support ring, and a heat dissipation chamber is formed between the lower mold body and the outer cover. The lower mold body has a hollow structure, and the outer cover is equipped with a first cooling mechanism and a second cooling mechanism for dissipating heat from the lower mold body. By installing the first and second cooling mechanisms on the outer cover, heat dissipation from the lower mold body is facilitated during the injection molding process.

[0004] Existing molds primarily dissipate heat in the lower part of the mold, but the upper part of the mold, near the injection port, cools slowly, which may lead to inconsistent product shrinkage and a high scrap rate. Utility Model Content

[0005] The purpose of this invention is to provide a precision silicone injection molding machine, which aims to solve the technical problem in the background art that "existing mold heat dissipation is mainly concentrated in the lower part of the mold, but the upper part of the mold cools slowly, which may lead to inconsistent product shrinkage and high scrap rate".

[0006] To achieve the above objectives, this utility model provides a precision silicone injection molding machine, comprising: a support frame, on which a lower template is provided; a mold is provided on the lower template; the lower template has multiple openings, and a mold-closing column is correspondingly inserted through each opening; one end of each mold-closing column is connected to an upper template, and the other end is connected to a base, the base being located at the bottom of the support frame;

[0007] A mold-locking device is disposed on the lower mold plate and acts on the base;

[0008] A lifting device is mounted on the lower template and acts on the base;

[0009] An injection device is disposed on the upper template and is used to inject a rubber compound into the mold; characterized in that the mold includes a lower mold body and an upper mold body; a support is provided with a first cooling component for dissipating heat from the lower mold body and the upper mold body; the lower mold body is connected to the lower template; the upper mold body is connected to the upper template, and the upper template is further provided with a second cooling component for dissipating heat from the upper template and transferring the cooling energy to the upper mold body.

[0010] Optionally, the first cooling component includes an external coolant module; both the lower mold body and the upper mold body are provided with cooling channels and inlet and outlet ports that connect to the cooling channels. The coolant module is connected to the inlet and outlet ports through a conduit, and the coolant circulates in the cooling channels, which can quickly cool the injection-molded workpiece.

[0011] Optionally, the second cooling component includes a plurality of water-cooled plates, each of which is disposed on the side of the upper template. The water-cooled plates can cool and dissipate heat for the upper template, thereby transferring the cooling energy to the upper mold body.

[0012] Optionally, the water-cooled plate is provided with multiple heat dissipation fins, which assist in heat dissipation.

[0013] Optionally, the bracket is provided with a boom, and the boom is provided with a fan, the fan facing the water-cooled plate.

[0014] Optionally, the lifting device includes two first rapid mold moving cylinders; the two first rapid mold moving cylinders are symmetrically arranged at the bottom of the lower mold plate, the output shaft of the first rapid mold moving cylinder acts on the base, and the base is connected to the upper mold plate through one end of the mold closing column, which can drive the upper mold plate to move up and down to realize mold closing and mold opening.

[0015] Optionally, the mold clamping device includes a mold clamping cylinder; the output shaft of the mold clamping cylinder acts on the base and provides clamping force to ensure that the mold will not open under the impact of the injection molding process.

[0016] Optionally, the injection device includes a feed tube assembly; the feed tube assembly includes a barrel, a screw is provided inside the barrel, a nozzle is connected to one end of the barrel, the upper template is provided with an injection hole, and the nozzle can pass through the injection hole to inject the rubber material into the mold.

[0017] Optionally, the injection device further includes an injection cylinder and a lifting cylinder; the injection cylinder is used to directly push the screw forward to complete the injection of molten plastic, and the lifting cylinder is used to control the up and down movement of the material tube assembly to ensure that the nozzle and the mold gate are in close contact.

[0018] Compared with the prior art, the above-mentioned one or more technical solutions in the precision silicone injection molding machine provided by the present invention have at least one of the following technical effects:

[0019] By setting up a first cooling component, heat can be dissipated from the lower mold body and the upper mold body. Because the upper mold body is close to the injection port, the heat is high and the heat dissipation is slow. By setting up a second cooling component, heat can be dissipated from the upper mold plate, and the cold energy can be transferred to the upper mold body, so that the cooling rate of the lower mold body and the upper mold body is about the same, the product shrinkage is consistent, and the scrap rate is reduced. Attached Figure Description

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

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a partial structural schematic diagram of the present invention.

[0023] Figure 3 This is a schematic diagram of the locking cylinder structure of this utility model.

[0024] Figure 4 This is a schematic diagram of the injection device structure of this utility model.

[0025] Figure 5 This is a schematic diagram of the cross-sectional structure of the upper or lower mold body.

[0026] The following are the labeling elements in the figure:

[0027] 100. Support; 110. Lower mold plate; 111. Opening; 120. Mold closing pillar; 130. Upper mold plate; 131. Injection hole; 140. Base; 150. Mold; 151. Lower mold body; 152. Upper mold body; 153. Cooling channel; 154. Liquid inlet; 155. Liquid outlet; 160. Water cooling plate; 170. Hanger arm; 171. First branch; 172. Second branch; 173. Third branch; 174. Rotary seat; 180. Fan;

[0028] 200. First rapid mold moving cylinder;

[0029] 300. Mold clamping cylinder; 310. Ejection cylinder; 311. Ejection shaft;

[0030] 400. Injection unit; 410. Feed tube assembly; 411. Barrel; 412. Screw; 413. Nozzle; 420. Injection cylinder; 430. Lifting cylinder;

[0031] 500, fuel tank. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0036] In one embodiment of this utility model, according to Figure 1-5As shown, it includes: a support 100, on which a lower template 110 is provided; a mold 150 is provided on the lower template 110; the lower template 110 has multiple openings 111, and a mold clamping column 120 is correspondingly inserted through each opening 111; one end of each mold clamping column 120 is connected to an upper template 130, and the other end is connected to a base 140, the base 140 being located at the bottom of the support 100; a mold locking device, which is located on the lower template 110 and acts on the base 140; a lifting device, which is located on the lower template 110 and acts on the base 140; and an injection device 400, which is located on the upper template 130, and the injection device 400 is used to inject adhesive into the mold 150.

[0037] Specifically, the mold-closing column 120 passes through the lower mold plate 110, with one end connected to the base 140 and the other end connected to the upper mold plate 130. The lifting device can act on the base 140, causing the base 140 to move up and down, further causing the upper mold plate 130 to close and open. When the mold is closed, the mold-locking device acts on the base 140 and locks the position of the base 140, thereby locking the position of the upper mold plate 130, preventing the upper mold plate 130 from moving backward or loosening, and ensuring that the upper mold plate 130 remains stably closed during high-pressure injection. The injection device 400 is located on the upper mold plate 130, and can inject rubber material into the mold 150 when the mold is closed.

[0038] like Figure 2 and 5 As shown, the mold 150 includes a lower mold body 151 and an upper mold body 152; the support 100 is provided with a first cooling component for dissipating heat from the lower mold body 151 and the upper mold body 152; the lower mold body 151 is connected to the lower template 110; the upper mold body 152 is connected to the upper template 130, and the upper template 130 is also provided with a second cooling component, which is used to dissipate heat from the upper template 130 and transfer the cooling energy to the upper mold body 152.

[0039] Specifically, by setting up a first cooling component, heat can be dissipated from the lower mold body 151 and the upper mold body 152. Because the upper mold body 152 is close to the injection port, the heat is high and the heat dissipation is slow. By setting up a second cooling component, heat can be dissipated from the upper mold plate 130, and the cold energy can be transferred to the upper mold body 152, so that the cooling speed of the lower mold body 151 and the upper mold body 152 is approximately the same, the product shrinkage is consistent, and the scrap rate is reduced.

[0040] according to Figure 2 and 5 As shown, the first cooling component includes an external coolant module (not shown); both the lower mold body 151 and the upper mold body 152 are provided with cooling channels 153 and inlet holes 154 and outlet holes 155 that connect to the cooling channels 153. The coolant module is connected to the inlet hole 154 and outlet hole 155 through a conduit. The coolant circulates in the cooling channels 153, which can quickly cool the injection-molded workpiece.

[0041] Specifically, this method is liquid cooling, which has a good heat dissipation effect. The heat of the mold 150 can be quickly reduced by circulating the cooling liquid in the cooling channel 153.

[0042] It is understood that the cooling channel 153 can be a spiral channel. The cooling channel 153 can be set only around the outer periphery of the lower mold body 151 and the upper mold body 152 without affecting the middle injection space.

[0043] The coolant module mainly consists of a coolant tank and a heat exchange component. The heat exchange component can keep the coolant in the coolant tank at a continuously low temperature.

[0044] according to Figure 1 As shown, the second cooling assembly includes several water-cooled plates 160, each water-cooled plate 160 being disposed on the side of the upper template 130. The water-cooled plates 160 can cool and dissipate heat for the upper template 130, thereby transferring the cold energy to the upper mold body 152. The water-cooled plates 160 are provided with multiple heat dissipation fins for auxiliary heat dissipation. A support arm 170 is provided on the bracket 100, and a fan 180 is mounted on the support arm 170, with the fan 180 facing the water-cooled plates 160.

[0045] Specifically, the second cooling component mainly relies on the water cooling of the water-cooled plate 160 and the air cooling of the fan 180. The two work together to reduce the temperature of the upper mold plate 130, thereby reducing the temperature of the upper mold body 152. This ensures that the heat dissipation speed of the upper mold body 152 and the lower mold body 151 is similar, preventing inconsistent product shrinkage and high scrap rate.

[0046] It's understandable that the water-cooled plate 160 has inlet and outlet ports for liquid, and an internal circulation channel. The coolant from the coolant module flows into the water-cooled plate 160 through conduits, thus lowering the temperature. The air cooling of the fan 180 can accelerate the heat dissipation of the heat sink fins, resulting in better cooling performance when used together.

[0047] The boom 170 can be divided into a first branch 171, a second branch 172, and a third branch 173. The first branch 171 is connected to the bracket 100. The first branch 171, the second branch 172, and the third branch 173 are all connected and rotated through a rotating seat 174. The fan 180 is mounted on the third branch 173. By rotating the third branch 173, the direction of the fan 180 can be adjusted at will. By adjusting the rotating seat 174 between the first branch 171 and the second branch 172, the fan 180 can be moved closer to or further away from the injection molding machine.

[0048] It is understandable that a display screen is also installed on the third branch 173, which can display data, and operation buttons can be located next to the display screen.

[0049] according to Figure 2 and 3 As shown, the lifting device includes two first rapid mold-moving cylinders 200; the two first rapid mold-moving cylinders 200 are symmetrically arranged at the bottom of the lower mold plate 110, and the output shaft of the first rapid mold-moving cylinder 200 acts on the base 140. The base 140 is connected to the upper mold plate 130 through one end of the mold-closing column 120, which can drive the upper mold plate 130 to move up and down to realize mold closing and mold opening. The mold-locking device includes a mold-locking cylinder 300; the output shaft of the mold-locking cylinder 300 acts on the base 140 and provides mold-locking force to ensure that the mold 150 will not be pried open under the impact of the injection molding process.

[0050] Specifically, an oil tank 500 is also provided next to the support 100. The oil tank 500 is connected to the mold-locking cylinder 300 through a conduit. The oil tank 500 is also equipped with a rotating motor to stir the oil tank 500 to prevent low-temperature solidification.

[0051] The mold-locking cylinder 300 is also equipped with an ejector cylinder 310. The ejector cylinder 310 is located near the lower mold plate 110, and the ejector shaft 311 of the ejector cylinder 310 passes through the lower mold plate 110.

[0052] The first rapid mold moving cylinder 200 and the mold locking cylinder 300 both act on the base 140. The base 140 is fixedly connected to the mold closing column 120, and the upper mold plate 130 is fixedly connected to the mold closing column 120. Driving the base 140 to move is equivalent to driving the upper mold plate 130 to move.

[0053] like Figure 4 As shown, the injection device 400 includes a feed tube assembly 410; the feed tube assembly 410 includes a barrel 411, a screw 412 is provided inside the barrel 411, and a nozzle 413 is connected to one end of the barrel 411. The upper mold plate 130 is provided with an injection hole 131, and the nozzle 413 can pass through the injection hole 131 to inject the rubber material into the mold 150. The injection device 400 also includes an injection cylinder 420 and a lifting cylinder 430.

[0054] Specifically, there are two injection cylinders 420 and two lifting cylinders 430. The material tube assembly 410 is located inside the injection cylinders 420 and the lifting cylinders 430. A motor is also provided at the end of the screw 412 away from the nozzle 413. The motor drives the screw 412 to rotate and plasticize the plastic material. The injection cylinders 420 are used to directly push the screw 412 forward to complete the injection of molten plastic. The lifting cylinders 430 are used to control the up and down movement of the material tube assembly 410 to ensure that the nozzle 413 fits tightly with the mold gate.

[0055] It is understandable that the method by which the injection cylinder 420 and the lifting cylinder 430 drive the feed tube assembly 410 is a mature existing technology, and will not be described in detail here.

[0056] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this utility model. It should not be construed that the specific implementation of this utility model is limited to these descriptions. For those skilled in the art, the architectural form of this utility model can be flexibly varied without departing from its concept, and a series of products can be derived. Any simple deductions or substitutions should be considered as falling within the patent protection scope defined by the submitted claims.

Claims

1. A precision silicone injection molding machine, comprising: A support frame is provided with a lower template; a mold is provided on the lower template; the lower template has multiple openings, and a mold-closing column is inserted through each opening; one end of each mold-closing column is connected to an upper template, and the other end is connected to a base; the base is located at the bottom of the support frame. A mold-locking device is disposed on the lower mold plate and acts on the base; A lifting device is mounted on the lower template and acts on the base; An injection device is disposed on the upper template and is used to inject a rubber compound into the mold; characterized in that the mold includes a lower mold body and an upper mold body; a support is provided with a first cooling component for dissipating heat from the lower mold body and the upper mold body; the lower mold body is connected to the lower template; the upper mold body is connected to the upper template, and the upper template is further provided with a second cooling component for dissipating heat from the upper template and transferring the cooling energy to the upper mold body.

2. The precision silicone injection molding machine according to claim 1, characterized in that, The first cooling component includes an external coolant module; both the lower mold body and the upper mold body are provided with cooling channels and inlet and outlet ports that connect the cooling channels. The coolant module is connected to the inlet and outlet ports through a conduit. The coolant circulates in the cooling channels, which can quickly cool the injection-molded workpiece.

3. The precision silicone injection molding machine according to claim 1, characterized in that, The second cooling component includes several water-cooled plates, each of which is located on the side of the upper template. The water-cooled plates can cool and dissipate heat for the upper template, thereby transferring the cooling energy to the upper mold body.

4. The precision silicone injection molding machine according to claim 3, characterized in that, The water-cooled plate is provided with multiple heat dissipation fins, which assist in heat dissipation.

5. The precision silicone injection molding machine according to claim 4, characterized in that, The support frame is equipped with a boom, and the boom is equipped with a fan, which faces the water-cooled plate.

6. The precision silicone injection molding machine according to claim 1, characterized in that, The lifting device includes two first rapid mold moving cylinders; the two first rapid mold moving cylinders are symmetrically arranged at the bottom of the lower mold plate, and the output shaft of the first rapid mold moving cylinder acts on the base. The base is connected to the upper mold plate through one end of the mold closing column, which can drive the upper mold plate to move up and down to realize mold closing and mold opening.

7. The precision silicone injection molding machine according to claim 6, characterized in that, The mold clamping device includes a mold clamping cylinder; the output shaft of the mold clamping cylinder acts on the base and provides clamping force to ensure that the mold will not open under the impact of the injection molding process.

8. The precision silicone injection molding machine according to claim 1, characterized in that, The injection device includes a material tube assembly; the material tube assembly includes a barrel, a screw is provided inside the barrel, a nozzle is connected to one end of the barrel, the upper template is provided with an injection hole, and the nozzle can pass through the injection hole to inject the rubber material into the mold.

9. The precision silicone injection molding machine according to claim 8, characterized in that, The injection device also includes an injection cylinder and a lifting cylinder; the injection cylinder is used to directly push the screw forward to complete the injection of molten plastic, and the lifting cylinder is used to control the up and down movement of the material tube assembly to ensure that the nozzle is in close contact with the mold gate.

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