KR102666484B1 - Gate cuting apparatus of the injection molding products - Google Patents

Abstract

The present invention relates to a device that automatically cuts the gate of an injection molded product. More specifically, it holds the injection molded product firmly without shaking, absorbs the shock generated during the gate cutting process, and cleanly cuts only the gate. This relates to a gate cutting device for injection molded products that prevents molded products from being damaged by colliding with the upper jig that rises and falls.
A gate cutting device for an injection molded product according to the present invention includes a frame including a pedestal, a plurality of guide rods installed perpendicular to the pedestal, and a lifting plate that moves along the guide rods; A lower jig member installed on the pedestal, formed with a lower seating groove in which the lower side of the injection molded product is seated, and provided with a lower blade; An upper jig member installed on the lifting plate, forming an upper seating groove in which the upper side of the injection molded product is seated, and having an upper blade that engages the lower blade to cut the gate of the injection molded product; It includes a driving member that raises and lowers the raising and lowering plate, wherein the upper jig member includes an upper jig that supports the upper surface of the injection molded product, and is installed on the lifting and lowering plate, and an inlet through which the upper jig is drawn in and out. It is characterized in that it includes a rod and a spring that is inserted into the outer periphery of the withdrawing and retracting rod and elastically supports the upper jig.

Description

Gate cutting device for injection molded products {GATE CUTING APPARATUS OF THE INJECTION MOLDING PRODUCTS}

The present invention relates to a device that automatically cuts the gate of an injection molded product. More specifically, it holds the injection molded product firmly without shaking, absorbs the shock generated during the gate cutting process, and cleanly cuts only the gate. This relates to a gate cutting device for injection molded products that prevents molded products from being damaged by colliding with the upper jig that rises and falls.

Injection molding is a molding method in which a thermoplastic or thermosetting plastic molding material is heated and melted in an injection mold, then pressure-injected into the injection mold through a screw to fill the mold, solidified or hardened, and then taken out as a molded product.

In the injection molding mold, the molten material is injected into the mold, which is the molding space of the molded product, through injection spaces such as sprues, runners, and gates, and after molding is completed, the mold is separated and the slide core is formed. After moving the eject pin, the undercut of the molded product is processed, and the gate part created during injection molding is individually cut by the operator through post-processing.

In this way, a lot of work time and workers were required to cut unnecessary gate parts by hand, which had problems such as being cumbersome to work with and reducing production efficiency.

Registered patent 10-2380445 "Gate cutting device for injection molded products for automobile interior materials", Open Utility 20-2021-0000126 "Automatic gate cutting device for injection molds", etc. introduce a cutting device that automatically cuts the gate, eliminating problems caused by manual work. is solving.

In order to remove only the gate from an injection molded product, the injection molded product must be held firmly without shaking, but in the prior art, the jig does not firmly hold the injection molded product, or has a complicated structure to hold it firmly.

The present invention was developed to solve the problems of the prior art. It firmly holds the injection molded product and efficiently absorbs the shock generated during cutting to prevent micro-shaking of the injection molded product and the cutter during the cutting process. The purpose is to provide a gate cutting device for injection molded products that cleanly removes only the gate from the injection molded product and gently presses the injection molded product during the lowering process of the upper jig to prevent the injection molded product from being damaged by impact.

To achieve this purpose, the gate cutting device for injection molded products according to the present invention is

A frame including a pedestal, a plurality of guide rods installed perpendicular to the pedestal, and a lifting plate that moves along the guide rods;

A lower jig member installed on the pedestal, formed with a lower seating groove in which the lower side of the injection molded product is seated, and provided with a lower blade;

An upper jig member installed on the lifting plate, forming an upper seating groove in which the upper side of the injection molded product is seated, and having an upper blade that engages the lower blade to cut the gate of the injection molded product;

It includes a driving member that raises and lowers the raising and lowering plate,

The upper jig member is

An upper jig that supports the upper surface of the injection molded product,

A pull-out rod installed on the raising and lowering plate and into which the upper jig is pulled out and retracted,

It is characterized in that it includes a spring inserted into the outer periphery of the withdrawal rod and elastically supporting the upper jig.

In addition, a hollow part is formed in the injection molded product, a gate is formed on the inner wall of the hollow part, and a step is formed on the lower surface of the injection molded product in connection with the hollow part,

The lower blade is characterized in that it includes a support portion that supports the inner wall of the hollow portion, and a support portion formed below the support portion to support the stepped portion.

In the gate cutting device for injection molded products according to the present invention, the lower jig and upper jig securely hold both the upper and lower sides of the injection molded product, and the gate forming part of the injection molded product is firmly supported by the lower blade, and the gate is firmly supported on the lower blade. The shock during the cutting process is efficiently absorbed by the installation table, so only the gate is cut cleanly, and the upper jig gently presses the injection molded product when lowering, preventing damage from collision. This is a very useful invention for industrial development.

Figure 1 is a perspective view of a gate cutting device for injection molded products according to the present invention.
Figure 2 is an exploded perspective view showing the lower jig member and the upper jig member as main parts.
Figure 3 is a diagram illustrating a fastening means according to the present invention.

Hereinafter, the gate cutting device for injection molded products according to the present invention will be described in more detail with reference to the drawings.

Before explaining in more detail the gate cutting device for injection molded products according to the present invention,

Since the present invention can be subject to various changes and can have various forms, implementation examples (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

In each drawing, the same reference signs, especially the tens and ones digits, or the same tens, ones, and alphabets indicate members having the same or similar functions, and unless otherwise specified, each of the drawings The member indicated by the reference sign can be understood as a member that complies with these standards.

In addition, in each drawing, the components are expressed exaggeratedly large (or thick), small (or thin), or simplified in size or thickness in consideration of convenience of understanding, etc., but as a result, the scope of protection of the present invention is interpreted as limited. It shouldn't be.

The terms used in this specification are merely used to describe specific implementation examples (sun, aspect, aspect) (or examples), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as ~include~ or ~consist of~ are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

As shown in Figures 1 and 2, the gate cutting device for injection molded products according to the present invention is roughly divided into components of a frame (10), a lower jig member (20), an upper jig member (30), and a driving member (40). do.

The frame 10 includes a main body 11, a stand 12 provided on an upper part of the main body 11, a plurality of guide rods 13 standing vertically on the stand 12, and the guide rods. It includes a lifting plate 14 that goes up and down along (13), and an installation plate 15 installed on the upper part of the guide rod 13.

Wheels 16 may be provided at the lower part of the main body 11 for convenience of movement.

The lower jig member 20 is installed on the pedestal 12 of the frame 10.

The lower jig member 20 includes a lower blade 21, a lower seating groove 26 in which the lower side of the injection molded product 1 is seated, and a lower through hole 27 through which the lower blade 21 is installed. It includes a lower jig 25 that is formed.

The lower blade 21 and the lower jig 25 are fixedly installed on the pedestal 12 by being tightened with bolts.

In order to prevent slight shaking of the injection molded product (1) during the cutting process of the gate, a hollow portion (2) is formed in the injection molded product (1), and a gate is formed on the inner wall of the hollow portion (2) during the injection molding process. A stepped portion 3 is formed on the lower surface of the injection molded product connected to the hollow portion 2, and the lower blade 21 includes a support portion 22 that supports the inner wall of the hollow portion 2 and , and includes a support portion 23 formed below the support portion 22 to support the stepped portion 3.

The injection molded product 1 is seated and fixed in the lower seating groove 26 of the lower jig 25 and the upper seating groove 36 of the upper jig 35, and the area where the gate is formed is the lower blade ( By being supported and fixed once more on the support portion 22 and the receiving portion 23 of 21), the injection molded product 1 is prevented from being slightly shaken during the gate cutting process.

The upper jig member 30 is an upper jig having an upper blade 31 that engages with the lower blade 21 to cut the gate, and an upper seating groove 36 in which the upper side of the injection molded product 1 is seated. (35), a plurality of pull-out rods 32 through which the upper jig 35 is pulled out and retracted, and a spring 33 that is inserted into the outer periphery of the pull-out rod 32 and elastically supports the upper jig 35. It is made including.

The withdrawing rod 32 and the upper blade 21 are fixed to the raising and lowering plate 14 of the frame 10.

The upper jig 35 and lower jig 25 have a simple structure by seating and holding the upper and lower sides of the injection molded product 1, respectively, and prevent the injection molded product 1 from shaking during the gate cutting process.

The spring 33 elastically supports the upper jig 35, thereby absorbing the shock generated when the upper jig 35 descends and comes into contact with the injection molded product 1, so that the upper jig 35 becomes an injection molded product. By gently pressing (1), the injection molded product (1) is prevented from being damaged by collision with the upper jig (35).

The driving member 40 raises and lowers the lifting plate 14.

As the driving member 40, a cylinder having a piston that is drawn in and out as shown in the drawing may be used, and a screw rod screw-connected to the raising and lowering plate 14 and a motor that rotates the screw rod forward and backward may be used.

The driving member 40 is installed on the installation plate 15 of the frame 10.

A coupling plate 41 is provided at the lower part of the driving member 40, and the coupling plate 41 and the installation plate 15 are coupled through a fastening means.

The fastening means according to the present invention combines and separates the coupling plate 41 and the installation plate 15 simply, quickly, and stably.

First, fastening holes are formed in the coupling plate 41 of the driving member 40 and the installation plate 15.

Referring to Figure 3, the configuration of the fastening means is as follows.

The fastening means includes a female block 110, a male block 120, and a fastening member 130.

The female member 110 includes a support portion 111 and a body 112 connected to the support portion 111 and having a receiving groove 113 formed thereon.

A locking groove 114 is formed on the inner wall of the body 112. A plurality of the locking grooves 114 are formed at different positions. As shown in the drawing, locking grooves 114 may be formed in a diagonal direction.

A guide groove 115 is formed on the inner wall of the body 112. The guide grooves 115 are formed in plural numbers and have a length that matches the locking groove 114 on a one-to-one basis.

The male block 120 includes a head portion 121 and a pin portion 122 connected to the head portion 121 and inserted into the receiving groove 113.

Inside the pin portion 122, a mounting space 124 and an in/out hole 125 are formed that are connected to the mounting space 124 and penetrate the pin portion 122 in the horizontal direction.

And two preparation holes 126 are formed that are connected from the head part 121 to the mounting space 124 of the pin part 122.

A guide protrusion 117 inserted into the guide groove 115 is formed to protrude on the outer surface of the pin portion 122. The guide protrusion 117 moves along the guide groove 115 and becomes blocked, thereby determining the depth at which the male block 120 is inserted into the female block 110. When the guide protrusion 117 is blocked by the guide groove 115, the locking groove 114 and the withdrawal/inlet hole 125 coincide.

The fastening member 130 is mounted on the locking pin 131 that is drawn out and retracted from the withdrawal/inlet hole 125 and the mounting space 124 of the male block 120, and rotates to the inside of the locking pin 131. It includes two rotating rods (134) that push the ends so that the locking pin (131) is pulled out from the withdrawal/entry hole (125).

An inclined push surface 132 is formed at the inner end of the locking pin 131. The locking pin 131 is elastically supported by the retraction spring 133 and is inserted into the withdrawal/inlet hole 125.

The two rotating rods 134 share the rotating axis 135 and rotate in opposite directions. When the rotating rod 134 rotates, the end pushes the push surface 132 of the locking pin 131, so that the locking pin 131 is pulled out from the withdrawal/inlet hole 125 and the female block 110 is caught. It is inserted into the groove 114 and caught.

The two rotating rods 134 are connected by a pulling spring 136 and are pulled in a direction closer to each other.

The rotation range of the two rotating rods 134 is limited in the upper and lower directions by the rotation limiting groove 137.

The process of fastening and separating the coupling plate 41 and the installation plate 15 through the fastening means configured as described above is as follows.

First, the fastening holes of the coupling plate 41 and the installation plate 15 are aligned.

Next, the body 112 of the female block 110 is inserted into the fastening hole of the coupling plate 41 and the installation plate 15.

Next, the pin portion 122 of the male block 120 is inserted into the receiving groove 113 of the female block 110. At this time, the guide protrusion 117 is inserted into one of the guide grooves 115 in consideration of the thickness of the coupling plate 41 and the installation plate 15.

Next, one of the two rotating rods 134 is pushed upward by pushing a pin into the fastening preparation hole 126 among the two preparation holes 126 of the male block 120. Then, when one rotating rod (134) is pushed by the pin and rotates upward and at a certain angle or more, the pulling spring (136) pulls the two rotating rods (134), and thereafter the two rotating rods (134) It automatically rotates upward.

The two rotating rods 134 rotating upward push the push surface 132 of the locking pin 131, and accordingly, the locking pin 131 is pulled out from the withdrawal/inlet hole 125 to form the annome block 110. ) is inserted into the locking groove 114 and caught.

When the locking pin 131 is inserted into the locking groove 114 and locked, the female block 110 and the male block 120 are fixed and fastened, and are interposed between the support portion 111 and the head portion 121. The coupling plate 41 and the installation plate 15 are also fixed. When a washer is inserted into the outer periphery of the body 112 and the pin portion 122 and the washer is interposed between the body 112 and the coupling plate 41 and between the pin portion 122 and the installation plate 15, the coupling is achieved. The plate 41 and the installation plate 15 are more sturdy and can be fixed by pressure.

When separating the female block 110 and the male block 120, push the pin into the separation preparation hole 126 of the two preparation holes 126 to remove one of the two rotary bars 134. Push the extension part upward and rotate it. When the extended portion of the rotating rod 134 rotates upward at a certain angle or more, the two rotating rods 134 automatically rotate downward by the pulling force of the pulling spring 136, and then the inlet spring 133 ), the locking pin 131 is retracted into the withdrawal/input groove 125 by the elastic force, so that the female block 110 and the male block 120 can be easily and quickly separated.

In the above description of the present invention, a gate cutting device for an injection molded product having a specific shape and structure has been described with reference to the accompanying drawings. However, the present invention can be modified and modified in various ways by those skilled in the art, and such modifications and changes can be made. It should be interpreted as falling within the protection scope of the present invention.

10: Frame 11: Body
12: stand 13: guide rod
14: Elevating plate 15: Installation plate
20: Lower jig member 21: Lower blade
25: Lower jig 26: Lower seating groove
30: Upper jig member 31: Upper blade
32: withdrawal rod 33: spring
35: upper jig 36: upper seating groove
40: driving member 41: coupling plate
110: female block 120: male block
130: fastening member

Claims (2)

A frame 10 including a pedestal 12, a plurality of guide rods 13 installed perpendicularly to the pedestal 12, and a lifting plate 14 moved along the guide rods 13;
A lower jig member (20) installed on the pedestal (12), formed with a lower seating groove (26) in which the lower side of the injection molded product is seated, and provided with a lower blade (21);
It is installed on the raising and lowering plate 14, and an upper seating groove 36 is formed in which the upper side of the injection molded product is seated. An upper blade 31 is engaged with the lower blade 21 to cut the gate of the injection molded product. An upper jig member (30) provided;
It includes a driving member 40 that raises and lowers the lifting plate 14,

The upper jig member 30 is
An upper jig (35) formed with an upper seating groove (36) that supports the upper surface of the injection molded product,
A pull-out rod (32) installed on the lifting plate (14) and into which the upper jig (35) is pulled-out and retracted,
It includes a spring 33 that is inserted into the outer periphery of the withdrawal rod 32 and elastically supports the upper jig 35,

A coupling plate 41 is provided at the lower part of the driving member 40, and the coupling plate 41 is coupled to the installation plate 15 of the frame 10 through a fastening means,

The fastening means is
A support portion 111 that is caught on one side of the coupling plate 41 when inserted into the fastening hole of the coupling plate 41, a fastening hole of the coupling plate 41 and the installation plate 15 connected to the support portion 111. ) A female block 110 including a body 112 inserted into a fastening hole and formed with a receiving groove 113, and a locking groove 114 formed on the inner wall of the body 112;
A head portion 121 that is caught on the other side of the installation plate when inserted into the fastening hole of the installation plate 15, and a pin portion 122 connected to the head portion 121 and inserted into the receiving groove 113, A mounting space 124 formed inside the pin portion 122, a withdrawal/inlet hole 125 connected to the mounting space 124 and formed through the pin portion 122, and the head portion 121. A male block 120 including a preparation hole 126 connected to the mounting space 124;
A locking pin 131 is pulled out from the withdrawal/inlet hole 125, inserted into the locking groove 114, and has an inclined push surface 132 formed at an inner end, and the locking pin 131 is inserted into the locking groove 114. ), which is mounted on the mounting space 124 and shares the rotation axis 135, is pushed and rotated by a pin inserted into the preparation hole 126, and when rotated, the locking pin 131 Two rotating rods 134 that push the push surface 132 so that the locking pin 131 is pulled out from the withdrawal/inlet hole 125, and a pulling spring 136 that connects the two rotating rods 134. and a fastening member 130 including a rotation limiting groove 137 that limits the rotation range of the two rotating rods 134. A gate cutting device for an injection molded product comprising a. delete

Images