KR102215694B1 - Rubber products molding apparatus - Google Patents

Abstract

The present invention relates to a rubber product molding device. The present invention comprises: a first supply unit in which a first undiluted solution container for storing a rubber undiluted solution such as silicone as a main material is detachably installed; a second supply unit in which a second undiluted solution container for storing a curing agent for curing the main material is detachably installed; an undiluted solution mixing unit connected to the first supply unit and the second supply unit by respective supply hoses; an undiluted solution transfer unit having a transfer screw for pressurizing the mixed rubber undiluted solution therein; a product molding unit consisting of a fixed mold and a moving mold; a mold moving unit connected to the moving mold to horizontally move the moving mold; and a molding ejection unit for separating a rubber product molded between the fixed mold and the moving mold while the moving mold is moved and separated with respect to the fixed mold. The present invention provides the advantages of efficiently supplying and re-supplying the rubber undiluted solution including silicone, etc. and the curing agent, so that the production is efficient, being able to control the degree of curing of a rubber product, and sufficiently maintaining the mixed rubber undiluted solution in a molding die.

Description

Rubber products molding apparatus {Rubber products molding apparatus}

The present invention relates to a rubber product molding apparatus, and more particularly, to a rubber product molding apparatus for producing a rubber product by supplying an undiluted solution of rubber including silicone as a main material and mixing the undiluted solution with a curing agent therein.

In general, rubber products are used to perform functions such as sealing or buffering, and are widely used in various industrial fields, and are used for various purposes.

These rubber products are molded from various rubber materials including silicone, and are molded and produced according to the characteristics of each use.

As an example, silicone rubber products are widely used among rubber products.

Silicone rubber is called silicon, and looking at its properties, natural rubber and general organic rubber will age in a short time and cannot be used if it exceeds 100℃, but silicone rubber has a use temperature of 150℃ and is used intermittently for a short time. When it does, it has heat resistance to withstand up to 300℃.

The saturation point of general organic rubber is -20℃ to -40℃, whereas silicone rubber is -60℃ to -70℃, so it maintains elasticity almost unchanged even at low temperatures where general organic rubber is destroyed, so it has the best cold resistance among all types of rubber. Do.

Unlike other organic rubbers, silicone rubber has very good weather resistance because it does not have double bonds that cause cracks by reacting with oxygen, ozone, and ultraviolet rays in the atmosphere in its molecular structure, and it is a high temperature that cannot be used by general organic rubbers other than fluorine rubber. It has excellent oil resistance and excellent chemical resistance, so it is hardly infringed by polar organic compounds such as acids and alkalis.

Silicone rubber is generally used in home appliances, medical devices, and industrial machinery, etc., due to its characteristics, and various methods are also provided for molding products from silicon with a wide range of performance.

On the other hand, rubber product molding equipment that molds rubber products using various rubber materials, including conventional silicone rubber, is each storage bin that stores rubber stock solutions A and B, such as silicone, above the mold, which is mostly composed of injection molding equipment. In this configuration, the rubber undiluted solutions A and B supplied from the respective reservoirs are discharged, mixed, and then introduced and molded into a lower mold.

However, as in the case of the conventional case, when the respective reservoirs of the rubber stock solutions A and B are installed above the mold, the transfer distance from the reservoir to the mold is short, so the discharge and mixing time of the rubber stock solutions A and B are limited. Since it is impossible to mold rubber products due to mixing imbalance, there is a problem of increasing the product defect rate.

In addition, since each reservoir must be separated from the injection device to replenish the rubber stock solutions A and B after a certain period of time, the separation operation that requires separating the injection device to separate the rubber stock solution supply device configured on one side of the injection device is complicated. And, there is a problem in that the productivity decreases due to the addition and delay of the work process time accordingly.

In addition, the amount of the curing agent and the amount of the catalyst in the first component were difficult to independently control when preparing a rubber molded article such as silicone from a liquid addition reaction-curable rubber composition divided into two types of liquids. It was not easy to maintain the pressure state sufficiently filled in the molding mold due to the weak viscosity.

For reference, as a manufacturing technology through rubber product molding,'rubber product molding apparatus' disclosed in Registration Patent No. 10-1103341,'Manufacturing Method of Silicone Rubber Molded Product' disclosed in Registration Patent No. 10-0692882, and registered patent No. Reference may be made to “press molding systems for rubber or silicone products” and the like disclosed in No. 10-1897518.

Domestic registered patent No. 10-1103341 Domestic registered patent No. 10-0692882 Domestic registered patent No. 10-1897518

The present invention has been improved by sufficiently researching and improving the existing problems as described above, and the supply and resupply of the rubber undiluted solution used as the subject including silicone and the curing agent used for the curing treatment of the subject is smooth, thereby improving molding and production efficiency. It is to provide a rubber product molding device that can be increased.

The present invention is to provide a rubber product molding apparatus capable of controlling the degree of curing of a rubber product to be produced, and sufficiently maintaining a mixed stock solution in a molding mold when molding a rubber product.

A rubber product molding apparatus according to the present invention for solving the above problem includes: a first supply unit in which a first stock solution container in which a rubber stock solution is stored as a subject is detachably installed; A second supply unit in which a second stock solution container in which the curing agent is stored is detachably installed; An undiluted solution mixing unit connected to the first supply unit and the second supply unit through respective supply hoses, and mixing the main material and the curing agent to prepare a mixed rubber stock solution; The undiluted solution mixing part is installed on the upper side to receive the mixed rubber undiluted solution, and a transfer screw for pressurizing the mixed rubber undiluted solution is provided therein, and a tip discharge part through which the mixed rubber undiluted solution passes and is discharged at the end of the transfer screw An undiluted solution transfer unit provided and having a tip injection unit corresponding to the tip discharge unit; It has a mold injection part connected to the tip injection part of the stock solution transfer part, and a fixed mold for molding a rubber product by the mixed rubber stock solution, and is installed to be horizontally movable in the fixed mold, corresponding to the fixed mold Product molding unit having a moving mold for molding rubber products; A mold moving part connected to the moving mold to horizontally move the moving mold; And a molding take-out part for separating the rubber product formed between the fixed mold and the moving mold while the moving mold is moved with respect to the fixed mold, and the transfer screw of the stock solution transfer part is rotated to rotate the mixed silicon stock solution. Is injected into the molding space of the fixed mold and the moving mold through the tip discharge part, the tip injection part, and the mold injection part, and blocks the tip injection part by the tip discharge part by moving in a straight line inside the circular transfer part. And maintaining the injection state of the mixed rubber stock solution injected into the molding space of the fixed mold and the moving mold.

The tip discharge unit, a cylindrical cylinder connected to the end of the transfer screw; And

And a conical blocking part connected to the cylindrical cylinder, and the inner wall of the tip injection part has a conical shape that is male and female coupled to the conical blocking part, and the mixed rubber undiluted solution passes from the cylindrical cylinder toward the inclined surface of the conical blocking part to pass the tip It is appropriate that a communication path is provided to reach the injection part side.

The molding take-out part may include a take-out block coupled to the mold moving part; A plurality of takeout pins inserted into the moving mold from the takeout block; And an elastic support part installed between the takeout block and the takeout pin, and the takeout pin protrudes into the moving mold by the movement of the moving mold to take out the rubber product.

The present invention is a heater disposed on the fixed mold and the moving mold to heat the fixed mold and the moving mold; And a cooling line disposed in the fixed mold and the moving mold.

The undiluted solution mixing part, a mixing container connected to the undiluted solution conveying part; A mixing member for mixing the stock solution in the mixing container; And it is appropriate to include a solenoid on-off valve provided between the mixing tank and the stock solution transfer unit.

The present invention may further include a flow control valve installed in each of the supply hose.

The present invention described above provides a rubber product molding apparatus capable of improving molding and production efficiency by smoothly supplying and resupplying a rubber undiluted solution used as a main material, including silicone, and a curing agent used to cure these subjects. can do.

The present invention can provide a rubber product molding apparatus capable of controlling the degree of curing of a rubber product and sufficiently maintaining a mixed rubber stock solution in a molding mold, thereby enabling the molding and production of high-quality rubber products.

1 is a front view of a rubber product molding apparatus according to an embodiment of the present invention.
2 is a detailed view of the stock solution transfer unit of FIG. 1.
3 is a detailed view of the product molding part of FIG. 1.
FIG. 4 is a state diagram of a rubber product being molded and taken out of the product molding part of FIG. 3.

Hereinafter, various embodiments of the present invention will be described with reference to specific embodiments shown in the accompanying drawings. Differences in the embodiments are not mutually exclusive and should be understood in a complex manner, and without departing from the spirit and scope of the present invention, specific shapes, structures, and characteristics described in relation to the embodiments are implemented in other embodiments. Can be.

The position or arrangement of individual components according to the embodiments of the present invention is changeable and should be understood as a combination of the drawings, and similar reference numerals in the drawings may indicate the same or similar functions over various aspects, and length, area, and thickness The etc. and their specific form may be exaggerated for convenience in description.

Each unit, module, part, member, or arbitrary structure in which sub-elements are not described is assumed to include or can include common sub-elements for each having a given function, and is limited to sub-elements or detailed structures shown in the drawings. I don't. Components that have been shown but are not described in general, are to be understood as being inherent in the detailed description of the embodiments.

A silicone rubber molding apparatus according to an embodiment having high practical implementation and high industrial applicability among various embodiments of the present invention will be described with reference to the conventional matters as described above.

Hereinafter, the main components of a rubber product molding apparatus according to an embodiment of the present invention will be described based on the drawings.

1 is a front view of a rubber product molding apparatus according to an embodiment of the present invention, FIG. 2 is a detailed view of the stock solution transfer unit of FIG. 1, FIG. 3 is a detailed view of the product molding part of FIG. 1, and FIG. 4 is It is a state diagram of the molding and extraction of rubber products in the product molding part of

Referring to Figure 1, the rubber product molding apparatus according to an embodiment of the present invention, the apparatus body 100, a first supply unit 101 in which a first stock solution container 102 in which a rubber stock solution as a subject is stored is detachably installed. , The second supply unit 105, the second supply unit 105, the first supply unit 101, and the second supply unit 105, the second supply unit 105, in which the second supply unit 106, in which the curing agent is stored for curing the rubber stock solution, is detachably installed. The undiluted solution mixing part 110 connected to 107, the transfer screw 121a for pressurizing the mixed rubber undiluted solution in which the main material and the hardener are mixed are provided in the undiluted solution transfer cylinder body 121, the undiluted solution conveying part 120, a fixed mold A product molding unit 130 consisting of 131 and a moving mold 132, a mold moving unit 135 connected to the moving mold 132 to horizontally move the moving mold 132, and a moving mold 132 It includes a molding take-out portion 140 that is moved relative to the fixed mold 131 and separated, and at the same time separates the molded rubber product between the fixed mold 131 and the moving mold 132.
The device body 100 is a rectangular type structure, and the raw liquid transfer part 120 and the product molding part 130 are arranged to face each other in the inside of the device body 100, so that the mixed rubber from the inside of the device body 100 It is installed so that the transfer of the undiluted solution and molding of the rubber product by the mixed rubber undiluted solution are performed
The undiluted solution mixing part 110 is installed on the outer upper surface of the apparatus body 100, but is positioned directly above the undiluted solution conveying part 120 so that the mixed rubber undiluted solution can be supplied smoothly.

The first supply unit 101 and the second supply unit 105 are stored in each of the undiluted solutions for making rubber products, and the first undiluted solution container 102 and the second undiluted solution container are pushed out in a plunger manner to push the liquid main substance and the hardener. It has a configuration including a plunger portion 103, 104 provided to move up and down from the inner side of (106).

The subject matter may be a rubber-based stock solution including silicone, and a material suitable for the curing agent may be used depending on the type of rubber stock solution used.

Each supply hose 107 of the first supply unit 101 and the second supply unit 105 is provided with a flow control valve 108 so that the supply flow rate of the main material and the curing agent flowing into the stock solution mixing unit 110 can be adjusted. have. The flow control valve 108 is an electromagnetic valve and adjusts the area of the flow path connected to the supply hose 107 so that the set flow rate passes.

The undiluted solution mixing unit 110 is to make a mixed rubber undiluted solution by mixing the main material and the curing agent introduced through each supply hose 107, the mixing tank 111 connected to the undiluted solution transfer unit 120, the mixing tank 111 It is appropriate to include a mixing member 112 for mixing the stock solution in, and a solenoid opening/closing valve 115 provided on the path between the mixing container 111 and the stock solution transfer unit 120.

The mixing member 112 is rotated by the mixing motor 113 and plays a role of mixing the main material and the hardener introduced into the mixing container 111. In the mixing container 111, the mixing member 112 is rotated for a predetermined time to make a mixed rubber stock solution.

The solenoid opening/closing valve 115 regulates a flow path allowing the inflow of the mixed silicon stock solution from the mixing tank 111 to the stock solution transfer unit 120, and a flow channel at a preset time so that a constant flow rate flows into the stock solution transfer unit 120. Is closed after opening.

1 and 2, the undiluted solution transfer unit 120 is provided with the undiluted rubber undiluted solution by installing the undiluted solution mixing unit 110 on the upper side, and a transfer screw 121a provided in the inside of the undiluted solution transfer cylinder body 121 A tip discharging part 122 is provided so that the mixed silicon undiluted solution passes through and discharged at the distal end of the), and a tip injection part 126 corresponding to the tip discharging part 122 is provided at the distal end of the undiluted solution transfer cylinder body 121 .

The mixed rubber stock solution is injected into the stock solution transfer unit 120 and then the transfer screw 121a rotated in the inside of the stock solution transfer cylinder body 121 on the side of the stock solution transfer unit 120 spirals through the transfer screw 121a by rotation. It is conveyed in the direction and flows toward the tip injection part 126 through the tip discharge part 122 provided at the tip of the transfer screw 121a.

The product molding unit 130 includes a mold injection unit and an injection line connected to the tip injection unit 126 of the stock solution transfer unit 120, and a fixed mold 131 for molding a rubber product using a mixed rubber stock solution, and a fixed mold It is installed to be movable horizontally on the 131 and includes a moving mold 132 for molding a rubber product in response to the fixed mold 131.

The fixed mold 131 is fixedly installed on the device body 100 corresponding to the horizontal position of the tip injection unit 126, and forms a molding space 133 for molding a rubber product together with the moving mold 132. .

The movable mold 132 is installed to be movable in the device body 100 and is connected to a movable rod 137 that is horizontally moved in the device body 100 via a molding take-out part 140. The moving rod 137 is horizontally moved in the device body 100 and may be connected to a hydraulic cylinder 136 or an electric screw installed in the device body 100.

In the rubber product molding apparatus according to an embodiment of the present invention, the mixed rubber undiluted solution is injected by rotating the transfer screw 121a of the undiluted solution transfer part 120 to the tip discharge part 122, the tip injection part 126, and the mold injection. It can be injected into the molding space 133 of the fixed mold 131 and the moving mold 132 through the part and the line.

In this embodiment, the tip discharging portion 122 is moved in a straight line on the undiluted solution transfer portion 120 together with the transfer screw 121a installed in the undiluted solution transfer cylinder body 121, and thus the tip injection portion ( 126) is blocked, and in a state where the injection state of the mixed rubber stock solution injected into the molding space 133 of the fixed mold 131 and the moving mold 132 is maintained, the mixed rubber stock solution is cured by the curing agent.

On the other hand, the tip discharge portion 122 includes a cylindrical cylinder 123 connected to the end of the transfer screw 121, and a cone blocking portion 124 connected to the cylindrical cylinder 123.

The tip injection unit 126 has a conical shape in which the inner wall portion is male and female coupled to the conical blocking unit 124, and the tip discharge unit 122 has a mixed rubber undiluted solution from the cylindrical cylinder 123 toward the inclined surface of the cone blocking unit 124 It is appropriate that the communication path 125 is provided so as to pass through and reach the tip injection part 126 side.

The tip discharging part 122 provided at the distal end together with the transfer screw 121a is linearly moved toward the tip injection part 126 so that the cone blocking part 124 comes into contact with the tip injection part 126 so that the tip injection part 126 Blocked.

A screw motor 127 for rotating the conveying screw 121a and a linear moving means 128 for moving in a straight line are provided at the rear end of the conveying screw 121a.

The linear movement means 128 may be provided with a linear electric screw 129.

1, 3 and 4, the molding take-out part 140 is inserted into the moving mold 132 from the take-out block 140 ′ coupled to the mold moving part 135 and the take-out block 140 ′. It includes a plurality of take-out pins 141, and a resilient support portion 142 installed between the take-out block 140 ′ and the take-out pin 141.

In the molding take-out part 140, the take-out pin 141 protrudes into the moving mold 132 by the movement of the moving mold 132 to take out the rubber product.

The elastic support 142 includes a plurality of cylindrical blocks 143 installed on both sides of the take-out pin, and a take-out spring 144 that supports the plurality of cylindrical blocks 143.

A heater 150 and a cooling line 155 are installed on the fixed mold 131 and the moving mold 132 in the product molding unit 130.

The heater 150 is an electric heater connected to the controller 160 for controlling the overall power and operation signals of the device, and supplies heat to cure the mixed rubber stock solution by heating the fixed mold 131 and the moving mold 132 do.

The cooling line 155 is connected to the water pump 156, and is formed by cooling the fixed mold 131 and the moving mold 132 together with the removal of the rubber product molded from the fixed mold 131 and the moving mold 132. When injecting the mixed rubber undiluted solution into the space 133, curing is prevented so that smooth injection is made.

As described above, embodiments of the present invention have been described, but based on this, if a person of ordinary skill in the relevant technical field does not depart from the essential technical idea of the present invention described in the claims, addition or change of components Various modifications and changes may be made to the present invention by deletion or addition, and this is also included within the scope of the present invention.

100: device body 101: first supply
102: first stock solution container 105: second supply unit
106: second stock solution container 107: supply hose
108: flow control valve 110: undiluted solution mixing unit
111: mixing container 112: mixing member
113: mixing motor 115: solenoid on/off valve
120: undiluted solution transfer unit
121: undiluted solution transfer cylinder body 121a: transfer screw
122: tip discharge unit 123: cylindrical cylinder
124: cone block 125: communication path
126: tip injection part 127: screw motor
128: linear movement
130: product molding section
131: fixed mold 132: moving mold
133: molding space 135: mold moving part
136: hydraulic cylinder 137: moving rod
140: molded ejection part 141: ejection pin
142: elastic support 143: cylindrical block
144: draw spring 150: heater
155: cooling line 156: water pump
160: control unit

Claims (6)

A first supply unit 101 detachably installed a first stock solution container 102 in which the rubber stock solution, which is a subject, is stored; A second supply unit 105 in which a second stock solution container 106 in which a curing agent is stored for curing the rubber stock solution as a main material is detachably installed; An undiluted solution mixing unit 110 connected to the first supply unit and the second supply unit through respective supply hoses 107, and mixing the main material and the curing agent to make a mixed rubber stock solution; The undiluted solution mixing unit 110 is installed at the top to receive the mixed rubber undiluted solution, and a transfer screw 121a for pressurizing the mixed rubber undiluted solution is provided in the inside of the undiluted solution transfer cylinder body 121, and the transfer screw A tip discharging part 122 through which the mixed rubber undiluted solution passes through and discharged is provided at the distal end of 121a, and a tip injection part 126 corresponding to the tip discharging part 122 at the distal end of the undiluted liquid transfer cylinder body 121 ) Provided with a stock solution transfer unit 120; A mold injection unit connected to the tip injection unit 126 of the stock solution transfer unit 120 is provided, and a fixed mold 131 for molding a rubber product by the mixed rubber stock solution, and a fixed mold 131 to be horizontally movable to the fixed mold A product molding unit 130 that is installed and has a moving mold 132 for molding a rubber product corresponding to the fixed mold; A mold moving part 135 connected to the moving mold to horizontally move the moving mold; And a molding ejection part 140 for separating the rubber product formed between the fixed mold 131 and the moving mold 132 while the moving mold is moved and separated from the fixed mold. In,
By arranging the stock solution transfer unit 120 and the product molding unit 130 to face each other on the inside of the device body 100 of a rectangular rectangular type structure, transfer of the mixed rubber stock solution and the mixed rubber stock solution from the inside of the device body 100 It is installed so that the molding of rubber products is performed by
The undiluted solution mixing part 110 is installed on the outer upper surface of the apparatus body 100, but is positioned directly above the undiluted solution conveying part 120 to enable a smooth supply of the mixed rubber stock solution,
The first supply unit 101 and the second supply unit 105 are installed on the outer upper surface of the apparatus main body 100 from the outside of the apparatus main body 100, and an undiluted solution mixing unit positioned directly above the raw solution transfer unit 120 ( 110), but the plunger part is arranged to move up and down from the inner lower side of the first stock solution container 102 and the second stock solution container 106 so as to push the base material and the hardener in a liquid state in a plunger manner. Including (103) (104),
The transfer screw 121 of the stock solution transfer unit 120 is rotated to transfer the mixed rubber stock solution to the fixed mold 131 and the moving mold through the tip discharge unit 122, the tip injection unit 126, and the mold injection unit. It is injected into the molding space of 132, and is moved in a straight line inside the stock solution transfer unit 120 to block the tip injection unit 126 by the tip discharge unit 122, and move with the fixed mold 131 To maintain the injection state of the mixed rubber stock solution injected into the molding space of the mold 132,
The undiluted solution mixing unit 110 is installed to rotate by a mixing motor 113 so as to mix the undiluted solution in the mixing tank 111 connected to the undiluted solution conveying part 120 and the inflow direction of the undiluted solution Including a mixing member 112 vertically installed toward the outflow direction, and a solenoid opening/closing valve 115 provided on a path between the mixing tank 111 and the stock solution transfer unit 120,
The undiluted solution transfer unit 120 includes a linear movement means 128 by a linear electric screw 129 to move in a straight line toward the product molding unit 130,
The tip discharge part 122 provided at the tip of the transfer screw 121a installed in the stock solution transfer cylinder body 121 includes a cylindrical cylinder 123 connected to the tip of the transfer screw 121a, and the cylindrical cylinder ( 123), and a tip formed at the front end of the undiluted liquid transfer cylinder body 121 by passing the mixed rubber stock solution from the cylindrical cylinder 123 to the inclined surface of the conical blocking part 124 It includes a communication path 125 to reach the injection portion 126 side,
The inner wall portion of the tip injection portion 126 has a conical shape that is male and female coupled to the cone blocking portion 124,
The molding takeout part 140 includes a takeout block 140 ′ coupled to the mold moving part 135, a plurality of takeout pins 141 inserted from the takeout block to the moving mold 132, and the takeout Includes an elastic support portion 142 installed between the block 140 ′ and the takeout pin 141, wherein the elastic support portion 142 includes a plurality of cylindrical blocks 143 installed on both sides of the takeout pin 141, It includes a take-out spring 144 for supporting the plurality of cylindrical blocks 143,
The movable mold 132 is installed to be movable within the device main body 100 and is connected to a moving rod 137 horizontally moved in the device main body 100 via a molding take-out part 140, and the movement The rod 137 moves horizontally within the device body 100 and is connected to a hydraulic cylinder 136 installed on the device body 100,
The rubber product molding apparatus, characterized in that the extraction pin 141 protrudes into the movable mold 132 by the movement of the movable mold 132 to take out the molded rubber product. delete delete delete delete delete

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