JP3045106U - Crusher for plastic molded parts - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To extend the life of a fixed blade member, to reduce the cost required for replacement, to reduce the number of fixed blade members that must be stored for inventory, and to maintain inventory. Provided is an apparatus for crushing a plastic molded member which can save costs. SOLUTION: The fixed blade member has fixed blades formed on both upper and lower sides of a comb-shaped notch portion engaged with each of the crushing blade and the cutting blade member, and a plurality of through holes are provided in a length direction. The fixed blade member is attached using a screw member having an upper end stopper larger than the through hole and having a polygonal concave hole on the upper surface side.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an apparatus for pulverizing a plastic molded member in which the life of a fixed blade member mounted in a casing is improved.

[0002]

[Prior art]

 FIG. 6 is a longitudinal sectional front view showing a conventional crushing apparatus of this type, in which a fixed blade member a is an upper surface side of an engagement portion between a crushing blade member c and a cutting blade member d alternately arranged on a drive shaft b. In addition, a fixed blade is formed. The fixed blade member a is provided with a plurality of counterbore holes e penetrating in the thickness direction, and a hexagon socket head cap screw f inserted into a portion of the counterbore hole e forms an inclined surface h in the upper casing g. It was screwed tight.

[0003]

[Problems to be solved by the invention]

 However, in the fixed blade member a having this configuration, a plurality of divided blades formed on the outer peripheral portion of the grinding blade member c and the cutting blade member d engage with one fixed blade during one rotation of the drive shaft b. Therefore, the number of loads applied to the fixed blade during grinding increases by the number of blades of each divided blade, the fixed blade wears faster, and the replacement cycle of the fixed blade member a is shortened. Was. In particular, when grinding sprue runners such as engineering plastics and glass fiber reinforced plastics and defective products, which are increasing recently, the material is harder than conventional plastics, so the wear of fixed blades and fixing The replacement period of the blade member a tended to be further shortened. For this reason, replacement of the expensive fixed blade member a not only costs a lot, but also increases the number of stocks and increases the cost required for stock management.

[0004] The present invention has been made in view of these circumstances, and prolongs the life of a fixed blade member to reduce the cost required for replacement thereof, and also provides a fixed blade member which must be stored in stock. The purpose of the present invention is to provide a pulverizing apparatus for plastic molded members, which can reduce the number and reduce the cost required for inventory control.

[0005]

[Means for Solving the Problems]

 The present invention has been made to achieve the above object, and a crushing blade member having a plurality of crushing blades and a larger cutting blade member are alternately fixed to a drive shaft, and a fixed blade is provided in a casing. In the crushing apparatus for a plastic molded member to which the member is attached, the fixed blade member has fixed blades formed on both upper and lower sides of a comb-shaped notch portion engaging with each crushing blade and the cutting blade member, and has a lengthwise direction. Are provided with a plurality of through holes, and the fixed blade member is attached using a screw member having an upper end stopper larger than the through hole and having a polygonal concave hole on the upper surface side. A device for crushing a plastic molded member, which is characterized by the above, has been devised.

[0006]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing an embodiment of a pulverizing device for a plastic molded member in cross section, FIG. 2 is a plan view thereof, and FIG. FIG. 4 is a front view showing a cross section of a lower half of a screw member used for mounting the fixed blade member, and FIG. 5 is a left side view of FIG.

As shown in FIGS. 1 to 3, the pulverizing apparatus of this embodiment has a horizontal drive shaft 2 rotatably held by a casing 1 and alternately fixed in the length direction of the drive shaft 2. It mainly comprises a crushing blade member 3 and a cutting blade member 4 and a fixed blade member 5 attached to one inclined surface 1a in the upper casing 1A.

The casing 1 is composed of an upper casing 1A and a lower casing 1B which are vertically divided, and these upper and lower casings 1A, 1B are centered on hinge pins 6, 6 connecting left and right ends of one side surface. It can be opened and closed as. The upper casing 1A is integrally fixed to the lower casing 1B by a screw member 7 pivotally supported at the center of the other side surface of the lower casing 1B and a wing nut 8 screwed thereto.

The drive shaft 2 is held at both left and right ends of the lower casing 1 B by bearings 9, 9, and a gad motor 10 is connected to one end protruding from the casing 1. Two crushing blade members 3 and 3 and a larger cutting blade member 4 are fixed to the drive shaft 2 in the casing 1 in a state of being alternately arranged with the cutting blade member 4 in the middle. .

The crushing blade member 3 is provided with a number of crushing blades 3 a that are inclined in the rotation direction of the drive shaft 2 in the circumferential direction of a protrusion formed at a constant interval in the length direction of the drive shaft 2. I have. On the other hand, the cutting blade member 4 is a plate-like member having a constant thickness larger than the crushing blade member 3, and has three large protrusions inclined in the rotation direction of the drive shaft 2 at portions protruding outside the crushing blade member 3. Are formed, and a cutting blade 4a is provided on the outer periphery of each of the protrusions.

In the upper casing 1A, as shown in FIG. 1, a holding space 11 extending upward is formed by two inclined surfaces 1a and 1b having different inclination angles. Of the two inclined surfaces 1a and 1b, the inclined surface 1a on the side facing the rotation direction of the drive shaft 2 has a larger inclination angle than the other inclined surfaces 1b, and a considerable part of the inclined surface 1a in the inclination direction is A concave portion 1 c having a constant depth is formed over the entire length of the drive shaft 2. A fixed blade member 5 having a plurality of through holes 5a in the longitudinal direction of the drive shaft 2 is fitted into the concave portion 1c so that the upper surface thereof is flush with the fixed blade member 5. It is fixed in the concave hole 1c by the screw member 12 inserted into the portion 5a.

The fixed blade member 5 is formed with a comb-shaped notch that engages with each of the crushing blades 3 a and the cutting blade member 4 of the crushing blade member 3. The inner surface is provided with notches through which the respective crushing blades 3a and the cutting blade members 4 can pass. The fixed blade member 5 provided with the comb-shaped notch has fixed blades 5b provided on the upper and lower sides of a portion associated with each of the crushing blades 3a and the cutting blade 4a, and the upper fixed blade 5b is worn by crushing. Then, the fixed blade member 5 is turned upside down so that the lower fixed blade 5b can be used.

As shown in FIGS. 4 and 5, the fastening screw member 12 of the fixed blade member 5 has an upper end stopper 12a larger than the through hole 5a on the upper end side, and has a polygonal shape, for example, a hexagonal shape on the upper surface side. The upper surface of the fixed blade member 5 is pressed by the lower surface of the upper end stopper 12a and fixed in the concave hole 1c by the rotation of the tightening tool fitted into the hexagonal concave hole 12b. I do. In this case, the upper end stopper 12a that presses the fixed blade member 5 may be formed as thin as possible because an excessive amount of protrusion into the holding space 11 may adversely affect the material to be ground during grinding. It is better to do.

When the crushing apparatus is configured as in the above embodiment, a large one of the crushed materials supplied into the upper casing 1A is roughly crushed by the large-diameter cutting blade member 4. The coarsely pulverized intermediate pulverized material and the smaller pulverized material supplied into the upper casing 1A are finely pulverized by the pulverizing blade members 3 and 3 and moved into the lower casing 1B. Sent to In the pulverizing step, the load on the fixed blade 5b of the fixed blade member 5 is the same as in the conventional case, and the life of the fixed blade 5b is also the same.

However, in the fixed blade member 5 of the present invention, since the fixed blade 5b is provided on both the upper and lower sides of the fixed blade member 5, when the fixed blade 5b on the upper side cannot be efficiently pulverized. If the fixed blade member 5 is turned over and crushing is continued, the replacement cycle of the fixed blade member 5 can be made twice as long as the conventional case. Although the fixed blade member 5 has a complicated structure and is expensive, the cost required to form the fixed blade 5b is small. Therefore, the application of the fixed blade 5b is doubled and the replacement cycle is doubled. In the case of the configuration, the cost required for replacing the fixed blade member 5 can be reduced to almost half of the conventional cost.

In this case, the upper end stopper 12 a provided with the through hole 5 a provided in the fixed blade member 5 and the polygonal concave hole 12 b provided on the upper surface side of the screw member 12 is In addition, this configuration is necessary to enable the fixed blade member 5 to be mounted in exactly the same state as before turning over. This is because, in the conventional configuration, when the fixed blade member a is turned over, the dimension on the inlet side of the counterbore hole e becomes smaller than the head of the hexagon socket head bolt f, and the insertion of the bolt f is not allowed. This is because it cannot be installed upside down.

In the crushing apparatus to which the present invention is applied, the configuration and the number of combinations of the crushing blade member 3 and the cutting blade member 4 are not limited to those shown in the above-described embodiment.

[0018]

[Effect of the invention]

 According to the present invention, the following excellent effects can be obtained.

In the apparatus for crushing a plastic molded member according to the first aspect, the fixed blade member has fixed blades formed on both upper and lower sides of a comb-shaped notch portion engaged with each crushing blade and the cutting blade member, In addition, since a plurality of through holes are provided in the length direction, if one of the fixed blades becomes dull, grinding can be continued by turning the fixed blade member upside down and continuing. The replacement cycle of the fixed blade member can be made twice as long as the conventional case. This also helps reduce the number of fixed blade members that need to be stored for inventory and saves inventory management costs.

In addition, although the fixed blade member has a complicated structure and is expensive, the cost of forming the fixed blade in the fixed blade member is small. Replacement costs can be reduced to nearly half. Also, the through hole of the fixed blade member is formed by one hole having a constant diameter, whereas the conventional counterbore hole is formed by combining two holes having different diameters. The labor and cost required for drilling are less than when forming a counterbore.

[Brief description of the drawings]

FIG. 1 is a front view showing a cross section of an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a front view showing, in cross section, a lower half of a screw member used for attaching a fixed blade member.

FIG. 5 is a left side view of FIG.

FIG. 6 is a front view showing a conventional example in cross section.

[Explanation of symbols]

 Reference Signs List 1 casing 2 drive shaft 3 crushing blade member 3a crushing blade 4 cutting blade member 4a cutting blade 5 fixed blade member 5a through hole 5b fixed blade 12 screw member 12a upper end stopper 12b polygonal concave hole

Claims (1)

[Utility model registration claims] 1. A crushing blade member having a plurality of crushing blades and a larger cutting blade member are alternately fixed to a drive shaft,
In a crusher for a plastic molded member having a fixed blade member mounted in a casing, the fixed blade member has fixed blades formed on both upper and lower sides of a comb-shaped notch portion engaging with each crush blade and the cutting blade member. In addition, a plurality of through holes are provided in the length direction, and the fixed blade member is attached by using a screw member having an upper end stopper larger than the through hole and having a polygonal concave hole on the upper surface side. An apparatus for crushing a plastic molded member, wherein the crushing is performed.