KR20200130564A - Injection molding apparatus for manufacturing of silicone products having multi ejecting structure - Google Patents

Abstract

The present invention relates to an injection mold for a silicone molded product, and more particularly, to an injection mold for a silicone molded product having a multiple ejection structure, capable of facilitating ejection of the molded product and facilitating separation of an overflow. The injection mold for the silicone molded product having the multiple ejection structure includes an upper die plate and a lower die plate, which are vertically opened and closed, wherein the upper die plate includes an upper core, and the lower die plate includes a lower core, wherein a cavity for forming a flange part and a protrusion part of the molded product is divisionally formed in die mating surfaces of the upper core and the lower core, wherein the lower core includes a core block coupled to the lower die plate, and an elevating block coupled to a top surface of the core block so as to be vertically movable, and wherein the lower core is configured such that the elevating block is spaced apart and separated from the core block when the mold is opened.

Description

Injection mold for silicone molded products with multiple ejection structure {INJECTION MOLDING APPARATUS FOR MANUFACTURING OF SILICONE PRODUCTS HAVING MULTI EJECTING STRUCTURE}

The present invention relates to an injection mold for a silicone molded product, and more particularly, to an injection mold for a silicone molded product having a multiple takeout structure provided to facilitate removal of the molded product and easy separation of overflow.

Generally, lenses for automobile headlamps use glass lenses, but due to the thickness or weight of the glass lenses, plastic lenses, which are aspherical lenses, have been used in accordance with the trend of lightening. Moreover, in recent years, a technology of applying a lens made of a silicone material to a lens for an automobile headlamp has been disclosed instead of a lens made of a plastic material. Such a silicon-made lens has the advantage of minimizing the possibility of lens separation even when an impact occurs due to its light weight and high elasticity.

However, such a silicone material for automobile headlamp lenses is manufactured through a transfer molding equipment, but in the case of a conventional transfer molding equipment, the molding resin is press-in by the working pressure of the plunger, depending on the moving speed of the plunger. Not only does it take a long time to form, it also has a problem that speed control is difficult. In addition, the transfer molding equipment has a problem in that the amount of wasted resin is large due to the structural aspect, and there is a difficulty in controlling the curing rate.

In order to solve these problems, lenses made of silicon were also manufactured using an injection mold. In the injection molding mold of a conventional plastic product, a resin melted at an appropriate temperature is injected and filled in a cavity of a mold having a product shape at an appropriate pressure and speed, and then the filled resin is cooled and solidified over a certain period of time. While the molded product is manufactured by removing the molded product by opening the molded product, a liquid silicone resin is used to mold a silicone material, which is achieved by injecting a liquid silicone resin at room temperature into the cavity and heating it. The method of manufacturing molded products is used. That is, while an injection molding mold using a conventional thermoplastic resin is a method of producing a product by cooling a heated resin, the silicone molding mold uses a method of producing a product by heating an unheated resin.

However, in conventional injection molds, due to the high fluidity of the liquid silicone molding resin, burrs are generated as the molding resin material flows through the narrow gap between the molds, or the molding resin stays in the cavity, causing the unmolded part of the injection product. There is a condition in which an injection product in a defective state may occur due to manufacturing reasons such as air bubbles formed in the resin filled in the cavity due to gas generated or generated during injection molding.

In addition, when taking out an injection product manufactured through a conventional injection mold, there is a difficulty in taking out the lens due to the structure in which the flange portion of the lens is bitten in the cavity. Moreover, in silicon products manufactured using conventional injection molds, when ejecting after molding, the operator forcibly pulls the product out or pushes the product out with an ejection pin. It has the drawback that the exterior surface may be damaged or the product may be severely torn.

Here, the lens product has a low transparency of the molded product due to the property of transmitting light, if there is an unmolded part on the product during manufacture, or if damage such as a scratch is applied to the product exterior, Since most of them are discarded because they are not only lost in value and are not practically usable, there is a need for a structure capable of minimizing damage to the product during the manufacturing process and the taking out process of injection molded products.

KR 10-1249701 B1

The present invention was conceived to solve the above problems, and the injection mold for a silicone molded product having a multiple ejection structure of the present invention prevents the occurrence of unmolded parts of the molded product and facilitates the ejection operation. It is an object of the present invention to provide an injection mold having a structure that can be used.

In particular, the injection mold of a silicone molded product having a multiple takeout structure of the present invention is installed with overflow on the side of the protrusion to prevent unmolding from occurring at the light incident part, which is the protrusion of the lens due to the high fluidity, which is a characteristic of the silicone resin, An object of the present invention is to provide an injection mold having a structure in which this overflow can be easily removed.

In addition, it is an object of the present invention to provide an injection mold having a structure in which the difficulty of taking out is avoided due to the clamping structure at the side of the flange.

In order to solve the above problems, the silicone molded product injection mold of the present invention is an injection mold for molding a molded product having a flange portion and a protrusion protruding from the flange portion. It relates to a molded product injection mold, comprising an upper mold plate and a lower mold plate installed to open and close up and down, the upper mold plate is provided with an upper core, the lower mold plate is provided with a lower core, and a mating surface of the upper and lower cores The cavity for forming the flange part and the protrusion part of the molded product is dividedly formed, and the lower core includes a core block coupled to the lower platen, and an elevating block coupled to the upper surface of the core block so as to move up and down. , The lower core is characterized in that the lifting block is separated upward from the core block during the mold opening operation of the mold.

In addition, a lower cavity is formed in the core block to form a portion corresponding to the protruding portion of the molded product, and an upper cavity is formed in the elevating block to form a portion corresponding to the flange portion of the molded product. The protrusion inserted into the lower cavity may be separated from the lower cavity by the separation operation of the core block.

In addition, the injection mold of the present invention may further include an elastic member that is elastically mounted on the core block and moves the lifting block in one direction according to the movement of the upper core.

On the other hand, the lower core may be provided with an overflow groove formed horizontally spaced apart from the cavity so that the overflow portion is formed along the circumference of the protrusion of the molded product.

Here, the lower core is coupled to the lower surface of the core block, and the overflow groove is formed in a groove shape on the upper surface, and further includes a slide block moving in a horizontal direction from the core block, and the slide block is It is linked and moved in the lateral direction, and as it is separated from the lifting block, the overflow part can be removed.

Moreover, since the overflow groove is formed in a shape inclined inward toward the upper side, it is possible to limit the movement of the overflow portion integrally formed in the molded product when the core block and the slide block are separated from each other.

The silicone molded product injection mold of the present invention can prevent the occurrence of an unmolded part of the molded product by forming an overflow part around the cavity of the molded product, and can easily perform the injection product during the take-out operation.

Specifically, in the present invention, the lower core portion is formed in a separable structure, and since the separating operation thereof is possible only by the mold opening operation without a separate device, it is possible to easily take out the molded product with only a simple structure. It has the effect of minimizing the damage that occurs on the exterior of the product.

Moreover, by forming an overflow in the molded product, as the molded resin in the cavity is completely filled, it is possible to prevent an unmolded part from occurring, and the overflow can be easily removed only by moving the slide block.

1 is a conceptual diagram of an injection mold according to the present invention.
2 is a cross-sectional view taken along line AA′ of the injection mold according to the present invention, and shows a mold closed state.
3 is a cross-sectional view taken along line AA′ of the injection mold according to the present invention, and shows a mold opened state.
FIG. 4 is a partially enlarged view showing an enlarged main part of FIG. 3.
5 is an operation diagram of FIG. 4.
6 is a cross-sectional view taken along line BB′ of the injection mold according to the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to embodiments to be described later in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms.

In the present specification, the present embodiment is provided to complete the disclosure of the present invention, and to completely inform the scope of the invention to those of ordinary skill in the art to which the present invention pertains. And the invention is only defined by the scope of the claims. Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques have not been described in detail in order to avoid obscuring interpretation of the present invention.

The same reference numerals refer to the same components throughout the specification. In addition, terms used in the present specification (referred to) are for describing exemplary embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. In addition, elements and operations referred to as'comprising (or having)' do not exclude the presence or addition of one or more other elements and operations.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless defined.

Hereinafter, the technical features of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to an injection mold, and in an exemplary embodiment of the present invention, to a mold that can be used to manufacture by injection molding a lens used for a headlamp for a vehicle. In particular, the embodiment of the present invention relates to a silicone molded product injection mold capable of manufacturing a molded product made of a silicone material by using a liquid silicone resin as a molding resin.

The molded product handled in the present invention is a lens for a headlamp used in a vehicle, and may be a lens member having a flange portion and a protrusion protruding from the flange portion. At this time, the liquid silicone resin (LSR), as a molding resin used in the manufacture of the lens, is a thermosetting material and is hardened by heating in a liquid form to form a product shape. Meanwhile, as another example, the molded product handled in the present invention may be a light guide member positioned between a lens for a headlamp and a light source to guide light from the light source to the lens.

1 to 6 show an injection mold according to the present invention.

As shown in the drawing, the mold apparatus according to the embodiment of the present invention includes a mold part 10 for injection molding a product by being opened and closed vertically.

The mold part 10 may be provided separated into an upper mold 100 and a lower mold 200 that open and close up and down. Here, the upper mold 100 and the lower mold 200 are molded to each other, and the molded cavity for molding the lens member is divided and formed on the molded surface. Here, the molding cavity for forming the lens member is provided with a flange portion of the lens member positioned at an upper side and a protrusion portion positioned at a lower side. Accordingly, as the mold part 10 is molded and closed and the molding resin is filled in the cavity, it is possible to form an injection product in the shape of a lens member. At this time, the flange portion and the protrusion portion of the molded product may be divided into an upper cavity (TC) and a lower cavity (BC), which will be described later, respectively.

In the upper mold 100, the upper fixing plate 110 is located at the upper side, and the upper mold plate 130 is installed at the lower side of the upper fixing plate 110. The upper core portion 150 is inserted and installed in the upper platen 130. In this case, the upper platen 130 may be provided with an upper core receiving groove 130a for accommodating the upper core portion 150. The upper core portion 150 is fixedly installed on the upper platen 130 as it is fastened to the upper core receiving groove with a coupling member such as a bolt.

The lower surface of the upper core part 150 forms a plane with the lower surface of the upper platen 130, and in the upper core part 150, a top cavity (TC) corresponding to the flange part of the lens member is partially formed. The cavity groove is formed in a groove shape that divides the upper portion of the flange portion. Here, the cavity groove of the upper core part 150 may completely form the upper cavity TC by mating with the lifting block 253 to be described later.

In the lower mold 200, the lower fixing plate 210 is located at the lower side, and the lower plate 230 is installed above the lower fixing plate 210. The lower core portion 250 is inserted and installed in the lower platen 230, and a lower core receiving groove 230a for accommodating the lower core 250 may be provided in the lower platen 230.

In this mold part 10, driving devices are provided so that the upper mold 100 and the lower mold 200 are mold-opening and mold-closing operations, and in the embodiment of the present invention, the upper mold 100 is moved vertically. It is provided to function as a mold and is operated up and down from the lower mold 200 in an upward direction to open and close the mold part 10.

In addition, the lower mold 200 may be provided with a moving sealing plate 220 installed between the lower plate 230 and the lower fixing plate 210 in order to drive the lower core part 250 up and down, and the moving sealing plate 220 A plurality of rods 221 are provided so as to protrude upwardly, and a tip portion thereof is coupled to a lower surface of the lower core portion 250. This movable sealing plate 220 moves the lower core part 250 up and down as it moves up and down.

That is, the lower core part 250 may be moved up and down in the lower mold 200 together with the movable plate 220 by the coupled rod 221.

Meanwhile, the lower core part 250 includes a core block 251 coupled to the lower platen 230 and an elevating block 253 coupled to the upper surface of the core block 251 so as to be movable up and down.

The core block 251 is installed at a position opposite to the upper core part 150 and fitted with the upper core part 150, and is inserted into and coupled to the lower core receiving groove 230a of the lower platen 230. At this time, the core block 251 is moved up and down together with the moving plate 220 as the rod 221 of the moving plate 220 is coupled to the bottom surface thereof. That is, the lower core portion 250 is substantially installed on the lower platen 230 in a structure in which the core block 251 is lifted and lowered.

The upper surface of the core block 251 forms a plane with the upper surface of the lower platen 230, and in the core block 251, a bottom cavity (BC) corresponding to the protrusion of the lens member is formed in the shape of a through groove. Is formed.

Here, a block receiving groove 251a may be formed on the upper surface of the core block 251 so that the lifting block 253 can be inserted, and the lifting block 253 is coupled to the block receiving groove 251a.

The lifting block 253 is coupled to the core block 251 and moves in a vertical direction, and may be formed as a plate-like block having a "C" shape. The lifting block 253 is inserted into the block receiving groove 251a of the core block 251 with the protruding portion disposed downward. At this time, the lifting block 253 may be coupled to the core block 251 by fastening the coupling member 252 to the protruding portion, and the coupling member 252 passes through the lifting block 253 to the core block 251 A bolt member of a method that is fastened to may be used.

In the lifting block 253, a cavity corresponding to the flange portion of the lens member is formed in the shape of a through groove, and the flange portion and the protrusion portion are connected to each other as they are joined to the core block 251.

Meanwhile, the lower core part 250 may be provided with an elastic member 254 for elastically connecting the lifting block 253 to the core block 251. That is, the lower core part 250 may be provided with an elastic member 254 that provides a predetermined pressing force so that the lifting block 253 can be vertically operated on the upper surface of the core block 251.

The elastic member 254 is mounted on the bottom of the lifting block 253 to provide a pressing force to move the lifting block 253 upward from the core block 251. The elastic member 254 may be inserted around the coupling member 252.

Accordingly, a spring receiving groove 251b accommodating the elastic member 254 may be formed in the core block 251 to a predetermined depth. The spring receiving groove 251b may be formed into a groove having a shape and size corresponding to the diameter of the elastic member 254 on the outer periphery of the coupling member 252 coupled to the core block 251, and the elastic member ( 254) will be accommodated in a seated state.

Therefore, the elastic member 254 is contracted by an external force applied by the upper core portion 150 when the mold is molded and closed, and when the mold is molded, the external force is released, thereby pressing the lifting block 253 while relaxing. It has a push function.

On the other hand, the lifting block 253 is in a state bound to the core block 251 by the coupling member 252, and the head of the coupling member 252 is accommodated in the lifting block 253 and the elastic member 254 A guide hole 253a serving as a guide may be provided so as to be lifted and lowered on the core block 251 with respect to the contraction and relaxation operation.

The guide hole 253a is formed in the upper side of the lifting block 253 to a predetermined depth to receive the head of the coupling member 252.

Accordingly, the coupling member 252 guides the vertical movement of the lifting block 253 in a state in which the head is accommodated in the guide hole 253a of the lifting block 253.

In addition, the coupling member 252 is in a state in which the lifting block 253 is substantially bound to the core block 251, so when the lifting block 253 is lifted or lowered by the elastic member 254, the lifting block 253 is The movement of the block is restricted so as not to be completely separated from the block 251.

That is, the lifting block 253 is in a state pressed by the upper core part 150 when the mold is molded and closed, so it is in close contact with the core block 251, and then the mold part 10 is molded and opened to the upper core part ( When the pressurized state by 150) is released, it can be moved upwardly away from the core block 251 by the elastic force of the elastic member 254.

On the other hand, the injection mold according to an embodiment of the present invention may be provided such that an overflow portion is formed around the lens member, and has a structure for easily removing the overflow portion. Here, the overflow unit is referred to as a shape of “OC” with reference to the drawing shown in FIG. 6.

That is, in order to form the overflow part, an overflow cavity (OC) may be provided in the lower core part 250 at a position spaced apart from the cavity by a predetermined distance. The overflow groove portion OC may be formed in the shape of a groove that is internally formed from the lower surface of the core block 251 to the upper side. Specifically, a lower cavity BC formed vertically through the core block 251 is provided, and an overflow groove OC formed upward from the lower surface of the core block 251 is disposed at a position adjacent to the lower cavity BC do.

The overflow groove (OC) may be formed by being disposed adjacently along the circumference of the lower cavity (BC) formed in the core block (251), and the molding resin injected into the cavity may flow into the overflow groove (OC). It is prepared to be. At this time, the molding resin may flow through the gap between the molds to be molded and closed, but the lower cavity BC and the overflow groove OC may be connected by forming a separate connection part. However, since the injection mold of the present invention uses a liquid silicone molding resin having high fluidity as a material, the molding resin can be introduced into the overflow groove (OC) without a separate connection part.

Here, according to the injection mold according to the embodiment of the present invention, in order to easily remove the overflow portion formed around the molded product through the overflow groove portion OC, the lower core portion 250 is a sliding block 255 ) Can be included.

The sliding block 255 is provided as a separating device of the overflow unit, is coupled to the lower surface of the core block 251 and mounted to be separated from the core block 251. The sliding block 255 is slidably coupled to the lower core receiving groove 230a provided on the lower platen 230 and slides in a horizontal direction. At this time, the sliding block 255 is perpendicular to the mold opening and mold closing direction of the mold through a separate hydraulic cylinder or a driving device (not shown) such as a cam slide assembly installed in a predetermined installation space 230b of the lower platen 230. It may be provided to move in the horizontal direction, and is moved in the outer direction of the core block 251 in connection with the vertical movement of the core block 251 at the start of the mold part 10.

Here, the sliding block 255 is formed so that the insertion protrusion 255a protrudes upward so as to be inserted into the lower receiving groove 251c formed on the lower side of the core block 251, and the insertion protrusion of the sliding block 255 ( An extended groove (not shown) connected to the overflow groove OC may be formed in 255a.

The extension groove may be formed in a groove shape on the upper surface of the insertion protrusion 255a of the sliding block 255, and is preferably formed in a shape inclined inward toward the upper side. This is, when the core block 251 is moved upward and separated from the sliding block 255 when the injection object is taken out, the overflow portion of the lens member located in the cavity of the core block 251 is caused by the inclined surface of the extension groove. As the upward movement is limited, it is separated from the actual injection product.

That is, as the overflow groove portion OC is connected to the extension groove portion, it is possible to substantially form a cavity for the overflow portion across the core block 251 and the sliding block 255.

On the other hand, the injection mold according to the embodiment of the present invention performs injection molding using a liquid silicone molding resin, and the unmolded part of the product occurs, such as air bubbles formed on the inner surface of the product due to gas generated during molding. I can. Accordingly, a vacuum structure was applied to remove residual gas in the mold.

That is, as shown in the drawing, a sealing member (not shown) for vacuum may be provided between the upper core part 150 and the lower core part 250, and the sealing member is inserted into the lower core part 250 The sealing groove portion 251d is formed in a groove shape.

The sealing groove portion 251d is disposed at a predetermined distance along the circumference of the lifting block 253 and formed on the upper surface of the core block 251. Further, the sealing groove portion 251d is preferably formed in a shape inclined inward toward the upper side to minimize the flow of the sealing member inserted into the groove. This minimizes the separation of the sealing member by limiting the upward movement of the sealing member inserted from the upper side of the sealing groove part 251d, and further prevents the sealing member from being pushed out.

An O-ring or the like may be provided and inserted into the sealing groove 251d as a sealing member.

Accordingly, by performing a vacuum operation after the mold unit 10 is molded and closed, the space in the mold unit 10 is converted into a vacuum state, and gas is prevented from being generated as injection molding is performed in a vacuum state.

The operation and action of the injection mold configured as described above will be described as follows.

The upper mold 100 on the movable side is operated downward to make it contact with the lower mold 200 on the fixed side, thereby mold closing the mold part 10. When the mold is closed, the air filled in the mold is sucked in and the mold is converted into a vacuum state.

At this time, the passage of air is minimized by blocking the air from the outside through the sealing member inserted into the sealing groove (251d).

In addition, as the sealing groove portion 251d is formed in a shape inclined inward toward the upper side to limit the movement of the sealing member, the sealing member is prevented from being separated from the sealing groove portion 251d when the mold is molded or closed.

After converting the mold into a vacuum state, the molding resin is injected into the cavity.

At this time, since the inside of the mold is maintained in a vacuum state by the sealing member inserted into the sealing groove 251d, gas generated during molding is minimized.

In addition, as the injection mold of the present invention is provided with an overflow groove portion OC for forming an overflow portion, the molding resin filled in the cavity may be introduced into the overflow groove portion OC. That is, the molding resin is first filled in the cavity, and the resin is overfilled into the overflow groove portion OC.

Accordingly, the overflow groove portion OC induces the molding resin filled in the cavity to flow into the overflow groove portion OC, so that the molding resin can be buffered in the cavity where the actual molded product is manufactured, This makes it possible to prevent an unmolded part from occurring in the molded product because the molding resin is partially filled (unbuffered).

After the molding resin is filled in the mold, the molded product is injection-molded by applying a certain heat. The liquid silicone molding resin used in the present invention is a thermosetting material that is hardened by heating in a liquid form to form a product.

In this way, after the injection molding of the molded product is completed in the mold closed state, the upper mold 100 is mold-opened in the upward direction to take out the product.

At this time, the elastic member 254 of the lower core part 250 is located in a contracted state when the mold is molded and closed, and then relaxes as the mold is opened and moves the lifting block 253 upward from the core block 251. Will be moved. That is, the lifting block 253 is spaced apart from the core block 251 by the elastic member 254.

In other words, in the lower core part 250, the lifting block 253 is spaced upward from the core block 251 when the mold part 10 is opened, and the lower core part 250 is Due to the structure in which the core block 251 and the elevating block 253 that mounts the flange portion of the molded product are separated from each other, the flange portion of the molded product that has been formed is positioned in a state mounted on the elevating block 253 It is operated so that the protrusion inserted into the core block 251 can be easily separated from the core block 251 only by the upward movement of the lifting block 253. In addition, since this operation is performed by the contraction and relaxation action of the elastic member 254 without a separate driving device, it is structurally simple and enables easy extraction of the molded product.

That is, in the case of the conventional molded in an integral lower core, the flange portion and the protruding portion are simultaneously engaged with the core, so a forced ejection operation has to be used to eject the molded product, but the injection mold according to the embodiment of the present invention Silver, the lower core part 250 is formed in a detachable structure, and since the separation operation is possible only by the mold opening operation without a separate device, it is possible to easily take out the molded product with only a simple structure. It has the effect of minimizing the damage that occurs on the exterior of the product.

In addition, along with the upward movement of the upper mold 100, the core block 251 is moved upward by operating the movable plate 220 in the upward direction. At the same time, the sliding block 255 coupled to the core block 251 is separated from the core block 251 while sliding in the horizontal direction.

Accordingly, the molded product located in the cavity is separated from the core block 251 when the lifting block 253 and the core block 251 are separated by the elastic member 254, and the protrusion is separated from the core block 251, and When the sliding block 255 is separated, the overflow part is removed from the molded product, and the molded product can be taken out.

Here, when the extended groove is formed in the sliding block 255, the overflow portion is removed from the molded product when the core block 251 moves upward and remains in the extended groove of the sliding block 255. That is, since the overflow portion is restricted due to the shape inclined inwardly toward the upper side of the extension groove portion, the movement of the overflow portion is restricted, so that the core block 251 cannot move together with the molded product when the core block 251 is raised, and thus is separated from the product. Thereafter, after the sliding block 255 is slid and moved in the outer direction of the core block 251, the overflow portion remaining in the extension groove can be removed.

That is, the injection mold of the present invention has a structure in which it is easy to take out a molded product after injection molding, and as the overflow part is formed, an unmolded part is prevented from occurring in the molded product, while the overflow part is easily separated.

Moreover, as the injection operation is performed in a vacuum state through the sealing member inserted in the sealing groove part 251d, the generation of gas during injection molding is prevented, thereby minimizing residual gas in the mold, thereby generating unmolded parts of the molded product. To prevent it.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments posted in the present invention are not intended to limit the technical idea of the present invention, but for explanation, and the scope of the technical idea of the present invention is not limited by these embodiments.

Therefore, the scope of protection of the present invention should be interpreted by the following claims rather than being limited by the above-described embodiments, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

10: mold 100: upper mold
110: upper fixing plate 130: upper platen
150: upper core part 200: lower mold
210: lower fixing plate 220: moving sealing plate
230: lower platen 250: lower core part
251: core block 252: coupling member
253: lifting block 254: elastic member
255: slide block

Claims (6)

An injection mold for molding a molded product having a flange portion and a protruding portion protruding from the flange portion, in which a silicone molded product injection mold using a liquid silicone molding resin,
Including an upper plate and a lower plate installed to open and close up and down,
An upper core is provided on the upper template, and a lower core is provided on the lower template,
A cavity for forming the flange part and the protrusion part of the molded product is divided and formed on the mating surface of the upper core and the lower core,
The lower core,
A core block coupled to the lower platen,
It includes an elevating block that is movable up and down on the upper surface of the core block,
The lower core is an injection mold for a silicone molded product having a multiple takeout structure, characterized in that the lifting block is separated upward from the core block when the mold is opened.
The method according to claim 1,
A lower cavity is formed in the core block to form a part corresponding to the protrusion of the molded product,
An upper cavity is formed in the lifting block to form a part corresponding to the flange part of the molded product,
A silicone molded product injection mold having a multiple takeout structure, characterized in that the protrusion inserted into the lower cavity is separated from the lower cavity by the separating operation of the lifting block and the core block when the molded product is taken out.
The method according to claim 2,
A silicone molded product injection mold having a multiple takeout structure further comprising an elastic member that is elastically mounted on the core block and moves the lifting block in one direction according to the movement of the upper core.
The method according to claim 1,
A silicone molded product injection mold having a multiple takeout structure, characterized in that the lower core is provided with an overflow groove formed horizontally spaced apart from the cavity so that the overflow part is formed along the circumference of the molded product protrusion.
The method of claim 4,
The lower core is coupled to the lower surface of the core block, and the overflow groove is formed in a groove shape on the upper surface thereof, and further includes a slide block moving in a horizontal direction from the core block,
The slide block is a silicone molded product injection mold having a multiple takeout structure, characterized in that the slide block is moved in a lateral direction in connection with the lifting operation of the lifting block, and as it is separated from the lifting block, the overflow part is removed.
The method of claim 5,
The overflow groove is formed in a shape inclined inward toward the upper side, thereby restricting the movement of the overflow part integrally molded with the molded product when the core block and the slide block are separated. Injection mold.

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