JP3163089U - Gate cutting cutter - Google Patents

Abstract

A gate cutting cutter for cutting a runner of a resin molded product with a gate on a product side has a simple structure, does not require a power source, and provides a structure with excellent handleability. A main body 1 having a jaw portion 1a projecting forward on the upper side of a handle portion 1b, a cutter member 3 to which a cutter blade 3a is attached, a lever 2 for rotating the cutter member, and a cutter blade are opened. In a gate cutting cutter configured by a spring that biases, a resin plate that receives the cutter blade is fitted in the front-rear axial direction of the center of the jaw. Further, the cutter member was attached to the main body so that the cutter blade could be rotated in a plane on the central axis of the jaw portion so that the cutter blade was opened and closed in the direction of contact with and separated from the resin plate. [Selection] Figure 1

Description

  The present invention relates to a cutter for gate cutting used for cutting a runner of a resin molded product with a product-side gate.

  In general, in order to separate a resin molded product from the runner and accurately remove it so that defective products do not occur, position the blade of the gate cutting tool in close contact with the end face of the product provided with the gate. It is necessary to cut without leaving the gate portion at the end of the runner by cutting with.

  As conventional ones in which the cutting blade is brought into close contact with the surface of the product in this way and cut, those shown in Patent Document 1 and Patent Document 2 are known.

  The air processing nipper for gate processing shown in Patent Document 1 includes a piston having a tapered surface at the tip, a cylinder in which the piston is slidably fitted, and a tapered surface pivoted to the tip of the cylinder. Consists of a pair of nipper blades that are driven in the direction of closing the blade edge by sliding contact, a bracket that slidably holds the cylinder in its axial direction, and a spring that urges the piston in a direction to return it to its original shape A sub-cylinder portion having a small diameter is recessed in the rear portion of the piston, and a sub-piston having a piston rod penetrating the rear wall of the cylinder is fitted into the sub-cylinder portion in an airtight manner. A spring that urges the piston toward the front end with the rear wall is built in, and the urging force of this spring is smaller than the urging force of the piston return spring built in the cylinder. In addition, the bracket is bent upward at the rear of the cylinder, and the rear end of the piston rod is attached to the bent vertical portion. The movement to a predetermined position and the cutting operation can be performed continuously.

  In addition, the nipper shown in Patent Document 2 has a thin plate having a notch wider than the width of the gate and narrower than the width of the runner on the blade surface of the nipper, and when the nipper is closed, the thin blade is separated from the blade surface. When the gate is cut with the nipper, the thin plate with the incision is separated from the blade surface by the closing movement of the blade. In order to push, the blade is forcibly brought into close contact with the product surface by the reaction force, and the gate is cut without being left uncut.

JP-A-10-193408

JP 2004-313431 A

  Among the conventional nippers for gate cutting described above, the one shown in Patent Document 1 has a very complicated configuration and uses air pressure as a power source, so it requires additional equipment such as a compressor, and the apparatus is large and expensive. It became a thing. Therefore, there is a problem that it is difficult for small and medium resin molding processors to introduce. In addition, since the degree of freedom of installation is low, there is a problem that it is not suitable for processing a small amount of various types of resin molded products.

  Further, in the nipper shown in Patent Document 2, the thin plate provided on the nipper blade surface is pushed up by the closing movement of the nipper blade, and by pushing the runner, the nipper blade is pressed against the product side, and the gate is It is designed to cut from the root side. Therefore, in order to obtain a desired effect, the length of the gate continuous with the runner has to be a predetermined constant dimension, and there is a problem that the object of the resin molded product that can be used is limited. Moreover, in order to improve this point, the design must be changed so as to correspond to the mold itself for producing the resin molded product, and in any case, there is a problem that labor and cost are required.

  This invention makes it a subject to improve the problem which the said conventional tool for gate cutting had.

  In order to solve the above-described problems, in the present invention, a gate cutting cutter is pivotally attached to a main body having a jaw projecting forward on a handle portion, and is pivotally attached to the main body. Between the cutter member and the handle portion of the main body, a cutter member having a cutter blade attached to the lever, a lever whose upper end is pivotally attached to the rear of the jaw, and a roller provided near the upper end to push the cutter member. And a spring that urges the cutter blade to open, and a groove is recessed in the longitudinal axis direction at the center of the jaw, and a resin plate that receives the cutter blade is fitted into the groove, and The cutter member attached with the cutter blade so that the cutter blade faces this resin plate was attached to the main body so as to be able to rotate within a plane on the central axis of the jaw. This allows one side of the upper surface of the jaw part to be opened so that the cutter blade can be positioned in close contact with the end surface of the product provided with the gate by the upper surface of the jaw part and the side surface of the cutter blade. The handle and lever are positioned below the resin molded product, which is the object to be cut, so that the cutting operation can be performed smoothly.

  As described above, the gate cutting cutter according to the present invention is a manual cutting tool in which a cutter member and a lever are pivotally attached to a main body. Therefore, the configuration is simple, no power source is required, and the handling is excellent. In addition, the cutter blade for cutting is in contact with and separated from the jaw part of the main body, and the operation lever is located below the cutter blade, so that the gate can be cut from the base end side. In addition, it is easy to position the cutter blade in close contact with the end face of the product, and the operation of grasping the lever at the time of cutting can be easily performed without interfering with the resin molded product. Therefore, there is an effect that the gate cutting operation can be performed easily and efficiently with high accuracy so that there is no uncut gate for various resin molded products having different shapes.

It is the front view which showed one Example of the cutter for gate cutting of this invention. It is a top view of an Example. It is a left view of an Example. It is sectional drawing of the AA line of FIG. It is the front view which showed the state which the cutter blade opened. It is explanatory drawing which showed the state at the time of the cutting | disconnection of a gate.

  A resin plate that receives the cutter blade is fitted in the axial direction of the center of the jaw of the main body, and a cutter blade is provided at the rear position of the jaw so that the resin plate and the cutter blade can be rotated in a direction in which the resin plate comes in contact with and away from the jaw. The cutter member was pivotally attached, and by this, the horizontal and vertical positioning of the resin molded product, which is the object to be cut, was made possible by the upper surface of the jaw and the side surface of the cutter blade. In addition, a lever that forcibly rotates against the urging force of the spring that opens the cutter blade in contact with the rear portion of the cutter member is pivotally attached to a position below the pivot point of the cutter member. Therefore, the lever operation at the time of cutting can be performed below the resin molded product without interfering with the resin molded product.

  Hereinafter, an embodiment will be described with reference to the accompanying drawings. As shown in FIG. 1, the gate cutting cutter of the present invention is pivotally attached to the main body 1, a cutter member 3 rotatably attached to the main body 1, and a lower side of the cutter member 3. The lever 2 is composed of a spring 4 provided between the cutter member 3 and the lever 2.

  The main body 1 has a handle portion 1b curved downward and connected to the rear side (right side in FIG. 1) of the jaw portion 1a protruding forward (left side in FIG. 1), and the center of the jaw portion 1a. As shown in FIG. 3, a groove 1d is recessed in the front and rear (left and right in FIG. 1) axial direction, and a resin plate 8 that receives a cutter blade described later is fitted into the groove 1d. Further, a plate-like attachment portion 1c having a thickness of at least 1/2 or less of the width of the jaw portion 1a is provided on the rear side of the jaw portion 1a (right side in FIG. 1).

  As shown in FIG. 4, the cutter member 3 is attached to the attachment portion 1 c of the main body 1 so as to be rotatable around the pivot point 5, and in front of the pivot point 5 (leftward in FIG. 4). A replaceable cutter blade 3a is attached. Further, the rear of the pivot point 5 (to the right in FIG. 4) is bent downward, and a spring hooking portion 3b is formed near the lower end of the bent portion.

  The lever 2 has a hook-like shape with a finger hook portion 2a formed on the front surface, and is attached to a rear position of the jaw portion 1a of the main body 1 so as to be rotatable about a pivot 6. A roller 7 that is in contact with the rear front end surface of the cutter member 3 is attached to a position below the pivot 6.

  The spring 4 is referred to as a so-called kick spring in which one end is hooked on a spring hook portion 3b provided at the rear portion of the cutter member 3 and the other end is fixed to a spring receiving portion 1e provided on the inner side of the handle portion 1b of the main body 1. The cutter blade 3 a attached to the cutter member 3 is urged to open in a direction away from the jaw portion 1 a of the main body 1.

  The cutter for gate cutting of the present invention has the above-described configuration.

  Next, its function will be described. First, in an operation start state in which the lever 2 is not gripped, the cutter member 3 is in an open state in which the cutter blade 3a at the tip thereof is separated from the jaw portion 1a of the main body 1 by the biasing force of the spring 4. Maintained. When the gate 11 of the resin molded product P is inserted between the cutter blade 3a and the jaw 1a in this state, the resin molded product P is placed under the product 10 on the side where the gate 11 is provided, as shown in FIG. Since the side is placed on the jaw 1a of the main body 1 and positioned, when the cutter is pressed against the product 10 in this state, the side surface of the cutter blade 3a comes into close contact with the end surface of the product 10 and preparation for cutting is completed.

  In this state, when the lever 2 is pulled in a direction approaching the handle 1b of the main body 1, the roller 7 attached to the lever 2 pushes up the rear part of the cutter member 3, and resists the urging force of the spring 4 with the cutter member 3. Then turn it counterclockwise. Therefore, the cutter blade 3a whose tip is in the open position away from the jaw portion 1a is rotated in the closing direction approaching the jaw portion 1a of the main body 1 and between the resin plate 8 provided on the jaw portion 1a. The gate 11 of the resin molded product P is sandwiched and cut. Thus, in the resin molded product P, the gate 11 existing between the product 10 and the sprue 12 is cut from the base end side so that it does not remain on the product 10 side, and a product with a good quality shape. 10 is taken out.

  Note that the lever 2 and the handle 1b of the main body 1 that are to be gripped by the hand when the lever 2 is rotated are positioned below the resin molded product P positioned on the jaw 1a of the main body 1. The operation is not hindered.

  As described above, after the gate 11 is cut, if the force attracting the lever 2 is weakened, the lever 2 is rotated together with the cutter member 3 by the urging force of the spring 4 in the clockwise direction in the figure. The blade blade of the cutter blade 3a is restored to the open state in which the cutting edge is opened, and the next cutting operation is ready.

  As described above, the gate cutting cutter of the present invention is used.

  Since it is a manual tool that has a simple structure and does not require a power source, it is easy to handle and has a high degree of support for cutting out products from resin molded products of various shapes. Therefore, there is a possibility that utilization to a supplier who manufactures a small amount of various types of resin molded products may be promoted.

DESCRIPTION OF SYMBOLS 1 Main body 1a Jaw part 1b Handle part 1c Mounting part 1d Groove 1e Spring receiving part 2 Lever 3 Cutter member 3a Cutter blade 3b Spring hook part 4 Spring 5 Pivot point 6 Pivot 7 Roller 8 Resin plate

Claims (1)

A main body with a jaw projecting forward on the handle,
A cutter member pivotally attached to the main body and having a cutter blade attached to the front side of the pivot part;
A lever whose upper end is pivotally attached to the rear of the jaw and which pushes the cutter member with a roller provided near the upper end;
A spring provided between the cutter member and the handle portion of the main body and biasing the cutter blade open;
A groove is provided in the longitudinal direction of the center of the jaw, and a resin plate that receives the cutter blade is fitted into the groove, and the cutter member is disposed in the jaw so that the cutter blade faces the resin plate. A cutter for gate cutting, wherein the cutter is attached to the main body so as to be able to rotate in a plane on the center axis of the gate.

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