KR20130104352A - The parts simplification undercut process mold that it is possible to install it to confined place - Google Patents

Abstract

PURPOSE: A mold for processing an undercut to simplify components which can be installed in a narrow place is provided to improve the quality of products by installing an ejector pin and a gate adjacent to each other to an inclined core when being applied to the mold and improving harmful elements to mold the products and to purge the products. CONSTITUTION: A mold for processing an undercut to simplify components which can be installed in a narrow place comprises a fixing piece (B2) and a circular pin (B3). The fixing piece is assembled or operated to a push plate (A11) of an inclined core (B1) in the vertical direction. The fixing piece fixes the inclined core to the push plate. Inclined surfaces (C5,C6) guiding to the rotational direction where the circular pin is to a rotary shaft are equipped. The circular pin fixes the inclined core to the fixing piece and acts as the rotary shaft. The circular pin includes an R shape (C7) of a lower end core in the rotational direction avoiding the interference as a rotating rate when the inclined core rotates. The circular pin includes an inclined surface (C2) making a spot of the inclined core of a core block (A6) to have a space. [Reference numerals] (AA) Operation area of a push plate; (BB) Installation area of an inclined core: 20.0 mm; (CC) Undercut processing structure components; (DD) Drawing of separated components

Description

The Parts Simplification Undercut Process Mold that it is Possible to Install it to Confined Place}

The present invention relates to a component simplified undercut processing mold that can be installed in a narrow space, and more particularly, to a structure capable of reducing an installation range using reduced quantity and rotation of parts, and when applied to a mold, a pin and gate inclined core structure. By installing close to the product, it is possible to improve the product quality by improving the product take-out and molding harmful factors of the product.When the undercut shape of several products is installed, the undercut processing mold structure can be applied even at narrow distances. By reducing the number of parts in the structure, it is possible to improve parts management and assembling of the assembler and to generate profits for parts processing cost and cost reduction.In the case of product designers, the undercut shape shifts and changes according to the possibility of reducing the scope of the undercut processing structure. Parts that can be installed in narrow spaces that can reduce product development time Deokeot relates to a processing mold.

Generally, as shown in FIG. 4, the cavity block A7 is coupled to a fixed (cavity) plate A9 of a conventional mold, and a product molding part A10 in the cavity block A7 is formed. The core block A6 is coupled to the moving (core) plate A8 to form the shape A10 and the undercut shape A0 on the back surface of the product in the core block A6, and move in the core block A6 (core ) The inclined core A1 is connected to the plate A11 and operated at an inclined angle through the plate A8. A guide block A2 is positioned at the middle of the inclined core A1. In A11, the components of the sliding unit SET (A3) having the purpose of fixing the inclined core and sliding are constituted. The ejector pin A5 is installed in a straight line on the moving (core) plate, one end is attached to the mill plate A11, and the other end is placed on the product molding part A10. Recently, when the rear valve gate A4 is used on the back surface of the product for the purpose of improving the quality of the product and reducing the material cost, the rear valve gate is located through the sealing plate A11 to the forming portion A10 of the core block A6. (A4) applies.

The prior art closes the fixed (cavity) plate (A9) and the moving (core) plate (A8) and injects the molding material into the molding part through the gate to form a product and then moves with the fixed (cavity) plate (A9). The (core) plate A8 is removed, the dense plate A11 advances within the bottom surface of the moving (core) plate A8, and the ejector pin A5 takes out the product, and the inclined core A1 The guide block A2 installed on the inclined surface of the core block A6 and the middle portion of the inclined core A1 is guided and operated in the inclined direction, and is horizontally moved by the sliding unit set A3 at the lower end (smiling part). Eliminate product undercuts.

However, this conventional technology is to avoid the installation of the undercut mold structure rather than the required position, such as the pin, the rear valve gate, due to the interference of the component due to the wide installation range by the relevant parts and operating angle in the case of the undercut mold structure of the product, First, in the case of Milpin, there was a problem that the quality of the product deterioration, such as unbalance, product bite, whitening phenomenon caused by failure to install in the expected position of the product bite. Second, when the undercut mold structure is close to the gate setting position considering product formability, the gate (rear valve gate) cannot be installed close by the interference of the wide structure of the undercut mold structure. There was a problem of disadvantageous molding improvement. Third, due to the operating range of the undercut mold structure, it is not possible to process undercut in a narrow space, which leads to a request for the movement and change of the undercut shape of the product, which is a problem caused by the size and product structure change. There was this. Fourth, there are problems that the parts management and assemblability of the operator due to the number of parts of a number of molds under the number of undercut treatment, the cost of the mold increases and the processing cost increases.

In addition, patent application No. 10-2007-0108715 "Undercut processing mold using an angular cam and an angular block" has been applied for a patent application, the inclined surface 13 of the bent portion 9 of the angular cam block 12 While passing through the inclined surface 13 to guide the inclined surface (13) vertically, the angular cam (10) guides the inclined surface (13) of the angular cam block 12 to guide the horizontal movement and the close plate (7) Sliding unit (8) located in the horizontal movement (sliding movement) and the angular cam 10 to the horizontal movement. The operation step of the angular cam 10 consists of operating at an inclination angle (rising to an arbitrary dimension), increasing vertically (↑), lowering vertically (↓), and operating at an inclination angle (↘) (return to origin). Since the angular cam block 12 is installed in the middle of the angular cam 10, the technology must be installed in consideration of component interference with respect to the size of the angular cam block 12, and the sliding unit 7 has a sliding unit. In applying the space to be installed (sliding unit SIZE + working distance + clearance), there was a problem that the installation range of the compact plate should also be considered for component interference.

In addition, patent application No. 10-209-0035161, the "mould assembly with a movable core" patent application, the pair of movable cores are operated in the vertical direction of the mill plate, the guide block is installed in the middle (35) The guide pins 37 and the guides of the inclined surface 55 of the movable core move the pair of movable cores horizontally in the axial direction of the guide plate 27 of the plate part to operate in the direction in which the undercuts are eliminated. It is an undercut mold structure in which the movable core moves in the axial direction of the plate guide pin 27 by the contact and guide of the inclined surfaces 53 and 63 when returning to the pre-operation position. ) (Up to arbitrary dimensions), horizontal movement (← →), vertical descent (↓), and operation at an inclined angle (↘↙) (home return) .This conventional technique uses a guide block ( 35) It should be installed considering the part interference about the SIZE. In addition, in the tight space part 7, a space (moving core size + working distance + clearance) for installing the guide pin 27 corresponding to the moving axis direction of the movable core must be secured in consideration of component interference in a narrow space. There was this. In addition, it is judged that the operation is smooth until the product is taken out in the operation process of the related art. However, when the movable core is returned to its original position, the inclined surfaces 53 and 63 of the movable core are taken by the edges of the core block. There is a problem that is expected to occur, it is determined that the slope of the core block should be extended as an improvement. And when the movable core is returned to the home position by the guide of the inclined surfaces 53 and 63, the upper end of the movable core can be moved to the home position by the guides of the inclined surfaces 53 and 63, but the lower end is the force to move to the home position in the axial direction of the guide pin 27. (P2) does not exist, and transmission to the lower end of the guide force (P1) of the inclined surfaces (53,63) is expected to be difficult to operate smoothly, and when not moved, there is a risk of safety accidents such as movable core deformation or cracks. There was a problem.

The present invention is to solve the above problems, the structure that can reduce the installation range by reducing the number of parts and rotation, when applied to the mold, by removing the product by installing the pin and the gate close to the inclined core structure It can improve the product quality by improving the molding harmful factor of the product, and it can apply the undercut processing mold structure even at the narrow distance when several undercut shapes of the product are installed, and the number of parts of the undercut processing structure can be reduced. It can improve parts management and assembling of assembly, and generate profits for parts processing cost and cost reduction, and product designers can shorten product development time by moving and changing undercut shape according to the scope of undercut processing structure. Its purpose is to provide a simplified undercut treatment mold that can be installed in tight spaces. .

In order to achieve the above object, the present invention forms a molded part between the cavity block and the core block, and the undercut molded part in the core block and the inclined core corresponding to the undercut shape are assembled and operated in the vertical direction on the compact plate and in the compact plate. It consists of a fixing piece for fixing the inclined core, and a circular pin that fixes the inclined core in the fixing piece and has a rotation axis, and has an R shape in the lower corner of the rotation direction to avoid interference as much as the amount of rotation during the rotation of the inclined core. After the inclined core is raised by a certain amount, the inclined surface having a space in place of the inclined core of the core block, the inclined surface or the R shape and the inclined surface of the inclined core to guide in the rotation direction using the circular pin in the fixed piece of the inclined core as the rotation axis And having an inclined surface for guiding the rotated angle in the vertical direction when the inclined core returns to its original position. Copper is characterized in having a rotation after the rising.

The inclined core is fixed to the fixing part at the lower end and does not move horizontally even if the plate is raised and lowered, and the inclined core B1 is axially rotated by the fixed circular pin serving as a rotating shaft.

The inclined core is characterized by having an inclined surface or an R shape in a shape corresponding to the inclined surface of the inclined core to guide the rotation direction after the first vertical rise.

The fixing piece is a tube body fixed to the mill and having a flow space inside and to the left and right, and having a lower end of the inclined core inserted into the shaft; The circular pin has a pin shape that is inserted into the fixing piece to fix the lower end of the inclined core to the fixing piece (B2) and performs the role of the rotating shaft.

The inclined core is characterized in that the inclined core is shaped to form a rotation space after vertical rise before rotation, and has an inclined surface that guides the direction at an angle before rotation after rotation.

As described above, the present invention has a structure that can reduce the installation range by reducing the quantity and rotation of parts, and when applied to a mold, by installing the mill pin and the gate close to the inclined core structure to improve the product extraction and molding harmful elements of the product It is possible to improve the quality of the product, to apply the undercut processing mold structure even at a narrow distance when several undercut shapes are installed, and to reduce the number of parts of the undercut processing structure. It is possible to improve the cost, reduce the cost and cost of parts, and reduce the development time of product designers by changing and changing the shape of undercuts.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

1 is an enlarged side cross-sectional view and a perspective view showing a main portion of a simplified simplified undercut processing mold that can be installed in a narrow space according to an embodiment of the present invention;
Figure 2 is an enlarged side cross-sectional view showing the main portion step by step to take the molded product by lifting and pivoting the inclined core in accordance with the operation of the mill in the mold simplified undercut processing mold that can be installed in a narrow space according to an embodiment of the present invention,
Figure 3 is an enlarged side cross-sectional view showing the main portion to be returned to its original position in the axial rotation of the opposite side of the inclined core after taking out the molded product in the part simplified undercut treatment mold that can be installed in a narrow space according to an embodiment of the present invention,
Figure 4 is an enlarged side cross-sectional view and perspective view showing the main portion of the undercut processing mold installed in the conventional narrow space.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the user, the intention or custom of the operator, and the like.

Therefore, it goes without saying that the definition should be based on the contents throughout this specification.

The part simplified undercut treatment mold which can be installed in the narrow space of the present invention forms a molding portion A10 between the cavity block A7 and the core block A6, and the undercut molding portion A10 in the core block A6. And a fixing piece B2 for assembling and actuating the inclined core B1 in the vertical direction to the inclined core B1 corresponding to the undercut shape A0 and fixing the inclined core B1 in the inclined plate A11, and a fixing piece ( B2) It is composed of a circular pin (B3) to secure the inclined core (B1) in the rotational axis, and to avoid the interference by the amount of rotation during the rotation of the inclined core (B1) R shape (C7) in the lower corner of the rotation direction ) Is provided, and the inclined core B1 is provided with an inclined surface C2 having a space in the seat of the inclined core B1 of the core block A6 after the inclined core B1 is raised by a predetermined amount, and the fixed piece of the inclined core B1 ( B2) is provided with an inclined surface C5 or R-shaped R1 and an inclined surface C6 of the inclined core B1 guiding in the rotational direction with the circular pin B3 as the rotation axis. And, the inclined core (B1) is the operation of the inclination cores (B1) configured to have a rotation after the rising and provided with a slope (C1) for guiding the rotation angle when returning the original position in a vertical direction.

The inclined core (B1) is fixed to the fixing piece (B2) at the lower end and does not move horizontally even if the plate (A11) is raised and lowered, the fixed circular pin (B3) acts as a rotating shaft, the inclined core (B1) is It has an inclined surface C6 of the inclined core B1 for axial rotation and guiding the rotation direction after the first vertical rise, and an inclined surface C5 or an R shape R1 in a corresponding shape. An inclined surface B2 is formed in a shape for forming a rotating space after the rising, and the inclined surface C2 guides the direction at an angle before the rotating after the rotating.

The fixing piece (B2) is a tube body that is fixed to the contact plate (A11) has a flow space in the left and right inside and the lower end of the inclined core (B1) is inserted into the shaft fixed, the circular pin (B3) is the fixing piece ( A shaft is inserted into B2) and the pin is shaped to fix the lower end of the inclined core B1 to the fixing piece B2 and to serve as a rotating shaft.

In the present invention, as shown in FIG. 1, the cavity block A7 is coupled to the fixed (cavity) plate A9, and the product molded part A10 in the cavity block A7 is formed. The core block A6 is coupled to the moving (core) plate A8 to form a molded part A10 and an undercut shape A0 on the back side of the product on the core block A6, and the inclined core B1 is a core block ( A6) is installed in a straight line with the mill plate A11 through the moving (core) plate (A8), the inclined core (B1) to the stepped shape (C3) and the bottom plate (A11) to support the injection pressure Bottom surface C8, which is a supported plane, inclined surface C1 located on the forming portion A10 to guide when the inclined core B1 returns, straight surfaces C4 and C9 for guiding initial linear motion, and inclined surface C2 ) And an inclined surface C5 of the core block A6 to assist the rotation of the inclined core B1, and an inclined surface C6 of the inclined core B1, and an R shape C7 at the bottom of the contact plate A11. The plate (A11) is composed of a fixed piece (B2) for fixing the planar movement of the inclined core (B1), and a circular pin (B3) for fixing and rotating shaft of the inclined core (B1) in the fixed piece (B2) have. The ejector pin A5 is installed in a straight line on the moving (core) plate A8, one end is attached to the mill plate A11, and the other end is placed on the product molding part A10. Recently, when the rear valve gate A4 is used on the rear surface of the product for the purpose of improving the quality of the product and reducing the material cost, the rear valve gate positioned through the sealing plate A11 to the forming portion A10 of the core block A6 ( A4) applies.

Referring to the operation and use of the present invention, as shown in Figure 2, the molding material is injected into the molding portion (A10) through the rear valve (A4) when the product is molded, the injection pressure on the molding area of the inclined core (B1) Will receive. In the case of this injection pressure, when applied to the distal end of the inclined core B1, breakage and warpage of the inclined core B1 occur. Accordingly, the stepped shape C3 of the lower end of the molded part A10 of the inclined core B1 supporting the injection pressure and the bottom surface C8 of the lower part of the lower plate A11 of the inclined core B1 assisting the auxiliary pressure, and after operation There is an inclined surface C1 that guides when returning to the original position.

Referring to the operation operation and action according to the product take-out process after forming the product of the present invention, in the first step of Figure 2, while the plate (A11) is raised to the top and guides the straight surfaces (C4, C9) inclined core ( The middle inclined surface C6 of B1 rises in the vertical direction of the sealing plate A11 until it reaches the inclined surface C5 of the core block A6, and the inclined surface C2 of the upper end of the inclined core B1 is completely core block. A gap GAP is generated in the operation direction portion of the inclined core B1 in the core block A6.

In the second step of FIG. 2, when the inclined surface C6 further rises after the inclined surface C5 of the core block A6 is in contact with the inclined surface C11, the inclined surface C5 is inclined core of vertical operation. Guide and guide in the direction of rotation of B1) and the inclined core (B1) is not horizontally moved by the fixing piece (B2) and the circular pin (B3) of the mill plate (A11), the circular pin (B3) acts as a rotating shaft The inclined core B1 is rotated by the amount of undercut elimination of the product designated by the designer. Looking at step 2 (operation completion) of Figure 2, it can be seen that 1 degree rotated clockwise. At this time, when the inclined core (B1) rotates on the bottom of the support plate (A11) of the inclined core (B1) in consideration of the interference with the plate (A11) in the corner of the rotational direction R-shaped (C7) centering on the circular pin (B3) ) Should be applied. The shape of the inclined surface C5 will be described further, in which the vertical operation direction of the inclined core B1 has the rotation direction of the inclined core B1 with the interference resistance on the inclined surface C6. 3 uses an inclined surface C5, but another example may be a shape that may have an interference resistance when the R shape R1 or the inclined surface C6 is operated in a linear direction. However, the edge (EDGE) shape should be avoided because it wears the inclined surface (C6) and can hinder the smooth operation.

In the step of returning the inclined core B1 after taking out the product of the present invention, as in the stepwise operation of FIG. 3, the inclined core B1 is rotated by one degree while the plate A11 that has been raised in three steps is lowered to the pre-operation position. The inclined surface C2 of the inclined core B1 is lowered in the vertical direction before contacting the inclined surface C1 of the furnace core block A6.

In the fourth step of FIG. 3, when the dense plate A11 is further lowered, the inclined surface C1 of the core block A6 guides the inclined surface C2 of the inclined core B1 so that the inclined core B1 is formed. While contacting the straight surface (C9) surface of the core block (A6) and the straight surface (C9) of the inclined core (B1), the circular pin (B3) of the mill plate (A11) acts as a rotating shaft to operate the inclined core (B1) The angle rotates counterclockwise from 1 deg to 0 deg.

In the fifth step of FIG. 3 of the present invention, the inclined core B1 is operated in the vertical direction while returning the position before the operation of the mill A11 to return to the position before the complete operation.

A0: undercut shape A4: rear valve gate
A5: ejector pin A6: core block
A7: Cavity Block A8: Moving (Core) Plate
A9: fixed (cavity) plate A10: molding part
A11: wheat plate
B1: Inclined Core B2: Fixed Piece
B3: Round Pin
C1, C2, C5, C6: slope C3: stepped shape
C4, C9: Straight surface C7: R shape
C8: bottom surface
R1: R shape

Claims (5)

A forming portion A10 is formed between the cavity block A7 and the core block A6, and is formed in the undercut forming portion A10 in the core block A6 and the inclined core B1 corresponding to the undercut shape A0. It is assembled and operated in the vertical direction to the mill plate A11, and has a fixed piece (B2) for fixing the inclined core (B1) in the mill plate (A11), and the inclined core (B1) in the fixed piece (B2) has a rotation axis role It is composed of a circular pin (B3), R shape (C7) of the lower corner of the rotational direction to avoid interference as much as the amount of rotation during the rotation of the inclined core (B1) is provided, and after the inclined core (B1) is raised by a certain amount The inclined surface (C2) having a space in place of the inclined core (B1) of the core block (A6), and in the rotation direction with the circular pin (B3) in the fixed piece (B2) of the inclined core (B1) as the rotation axis The inclined surface C5 or R-shaped R1 and the inclined surface C6 of the inclined core B1 are guided, and the inclined core B1 is rotated in the vertical direction when the inclined core B1 returns to its original position. DE inclined to tilt the core (B1) operation that can be installed in a narrow space, characterized in that it has a rotary component to simplify processing undercut mold after the rising of having (C1) to. The method of claim 1, further comprising:
The inclined core (B1) is fixed to the fixing piece (B2) at the lower end and does not move horizontally even if the plate (A11) is raised and lowered, the fixed circular pin (B3) acts as a rotating shaft, the inclined core (B1) is Simplified undercut mold for installation in tight spaces, characterized by axial rotation. The method of claim 1, further comprising:
The inclined core B1 has an inclined surface C6 of the inclined core B1 for guiding the rotational direction after the first vertical rise and an inclined surface C5 or an R shape R1 in a shape corresponding thereto. Simplified undercut molds for installation in tight spaces. 3. The method of claim 2,
The fixing piece (B2) is a tube body fixed to the contact plate (A11) has a flow space in the left and right inside and the lower end of the inclined core (B1) is inserted into the shaft fixed;
The circular pin (B3) can be installed in a narrow space, characterized in that the pin is inserted into the fixing piece (B2) to secure the lower end portion of the inclined core (B1) to the fixing piece (B2) and to serve as a rotating shaft. Parts simplify undercut processing mold. 4. The method of claim 3, further comprising:
The inclined core (B1) is a shape for forming a rotation space after the vertical rise before rotation in a narrow space characterized in that the inclined core (B1) has an inclined surface (C2) for guiding the direction at an angle before rotation after rotation Installable parts simplify undercut processing molds.

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