JPS5914478A - Recoilless urethane hammer and its manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Is the present invention recoilless? How to make it

A hollow chamber is installed inside Hanun's moon head (TJ)
A granular or blank material is stored in a movable manner inside the container, and it is used to move this material.
Te41v! A hammer designed to suppress the recoil generated by the hammer is known as a recoilless hammer. This kind of recoilless hammer has more powerful striking force (p),
C, the reaction that is transmitted to the workers during circumnavigation is suppressed, and the fatigue of the workers is reduced! What are the advantages of reducing J'j? (, It is widely used in various workplaces.

First, a hammer whose striking surface is formed or coated with an elastic material such as GolX or synthetic resin will not damage the struck surface.
The hammer of this scale is widely used in the sheet metal industry, etc. It also has the advantage of emitting sparks when it strikes metal parts, making it fireproof. There is a useful C.

This recoilless effect is known as a hammer that has both the properties of preventing scratches on smooth surfaces.

1975 Patent Application Publication No. 9198 [J, Skeletal spline member A cylindrical member with a handle and a lead bullet sealed inside. A hammer is disclosed in which a skeletal head member made of a skeletal head member is made into a hammer shape by surrounding and covering it with a polymer based on a polymer. Place the official spline part shrine a3J and the σ degree head shrine in the mold via the position setting bottle, then combine the molds and inject the outer packaging material 1'I1. There is a method described.

In this method, the spline member that becomes the skeleton and the head part must be made in advance from metal such as brass, and the head part must be made from lead or other materials. When enclosing one body and putting lids on both ends, great care must be taken to ensure that the interior becomes a completely airtight chamber. In addition, when placing the f1 grade member at a specific position in the mold, a considerable distance between f and }-1 is required to avoid matching the hole in the 18th part of the mold's trap bone. After the second mold, the small hole where the bottle was removed remains in the outer envelope covering.

The object of the present invention is to provide 11. of the striking surface portion. A 1J shell that can withstand long-term use without worrying about $ loss, handling of the 1J head, or breakage of the handle.
The present invention provides a recoilless urethane hammer that can damage the hammer and a method for manufacturing it efficiently with low cost and cost.

Hon-g and Akira are 4J? A manufacturing method using a recoilless urethane hammer consisting of a hollow chamber inside the head (with an m-type substance movably stored inside the head and a core inserted into the center of the handle). Then, apply urethane resin to the molding die 111 (one person follows the procedure A3 for molding), places the preformed brazing member at a predetermined position in the molding die, and places the urethane resin in the molding die 111. After hardening, the solder material is melted and removed to form a hollow chamber inside the firing head and a passage communicating with the hollow chamber at the center of the handle, and the inertial material is removed from the hollow chamber through the passage. The present invention relates to a method for manufacturing a recoilless urethane hammer characterized by placing it in a hollow chamber, inserting a core into the passageway, and closing the end thereof.

The most preferred embodiment of the recoilless urethane hammer according to the present invention and its manufacturing method will be described below with reference to the drawings.

FIG. 1 (1) shows an example of a recoilless urethane hammer according to the present invention, in which a 1-1 hammer head 2 is integrally molded with urethane resin at the tip of a handle 1, and the interior of the striking order 2 is shown. A hollow chamber 3 is provided with a step 4, and iron sand 1 is housed therein as an inertial body in the shape of 1. A core 5 is embedded in the longitudinal direction of the center of the handle 1.

FIG. 2 shows the state when the two-sided molding molds 10 and 11 are opened.
Vacuum 15 U, 1 (
A suitable number of holes 19 are provided on the inner surface of each bottle 18 for positioning the molds 10 and 11 when they are combined. A brazing member 20 for forming a hollow chamber 3 in the firing head 2 and forming a passage passing from the distal end 11 of the handle 1 to the hollow chamber 3 is formed of a molded metal IW'10. Part 4, Δ20, which is previously proposed in
1'71j) It is roughly molded with a wax selected from wax, and consists of a head and a rod-shaped handle. τ is suspended in the cavity 15.1G of the molds 10 and 11. η4
“Wa 15, both sides of Eigata 10.11 are included μ,” - gain 2
5 to 11＞; When installing, insert the tip of the rod-shaped handle of the rod member into the hole in the center of this j-gain 25, protrude into the soil, and drill into this tip. Insert bottle 2 into the hole
Insert 6, lock it, and hang it 13.1 to i 2
J is urethane resin solution? ”] Opening 2 of the person-covering chamber
7.27? I Ru.

Next, the first step of manufacturing according to the present invention will be explained. First, as shown in Fig. 1, lock the brazing member inside the mold, combine both molds 10.11, and add a portion of the urethane resin solution 1:L. Inject from 12. After the urethane resin solidifies and primary vulcanization, it is molded into 1112 mold and + for aging.
JI + hot secondary + JII hat >. As the wax member 20 softens and melts due to this heating, it flows out from the passage in the center of the handle 1, thereby creating a hollow chamber 3 in the striking head and communicating with the handle. A passage can be formed in the center. This place to take off your clothes]! After p, put sand #2/l into the hollow chamber 33 in the striking head by using the inertial body material door, and insert the metal rod into the passage. , Forming the core 5 5. The wood end of the passage is sealed by injecting a urethane resin solution. /! There is no problem in reaching the opposite wall in the vacant room 3.

In the present invention, it is preferable that the urethane resin has a hardness of 11-△80 degrees or more by blending a curing agent, and is solidified (secondary vulcanization) between 30 degrees Celsius and 100 degrees Celsius.
It can be aged (secondary vulcanization) at a temperature between 100 and 110 degrees. On the other hand, brazing member 2
0 is selected as ζ solidification of urethane resin 111
11ij! L) Softening and melting FR at a temperature higher than the point C, molding at a low temperature. 1 For example, 330 degrees Celsius
50 degrees - C hardness (next 1) If h;: [) L, aged at 50 to 80 degrees Celsius (secondary addition) When covering with urethane resin, the melting point is 001' degrees Celsius.
The solder member 20 is formed using the wax in a. Also, it is assimilated at 8 degrees Celsius to 100 degrees Celsius, and 100 degrees Celsius to 100 degrees Celsius.
A brazing member 20 having a temperature of 100 degrees Celsius is formed.

5 to 7 show other embodiments, and FIG. As shown in Fig. 6, the 14-branch part is embedded in the wax part 4A to form a hollow space in the striking head. A member for forming a passage communicating with the metal pipe 35 is used instead of the metal pipe 35. In this case, the metal pipe 35 is used to
The wax of the member for forming the hollow part 33 in the first stroke 11fj flows out through the hollow part in the metal vibrator 35 (from the distal end of the handle), and as shown in Fig. 7, the metal vibrator 35 itself remains in the center of the handle 1 and forms a core.Thereafter, 3 s of sand 4 is poured into the hollow chamber 3 in the head of the J'J from the hollow part of this metal vibrator 35 as an inertial material. The hollow part of the metal pipe 35 is filled with urethane resin and closed.
do. This metal pipe core 35 is used when using a large hammer.
Extremely effective. The metal disk C'l0131 supported by the metal rod 32 remains inside the hollow chamber 3 in the 1J firing head, and protects both side walls of the hollow v3 from wear due to the movement of n-type substances. Hy I will.

The preferred embodiments of this invention have been described above.
However, this light beam can be implemented in various modifications based on the configuration point (1) described in the claims.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing one embodiment of the recoilless urethane hammer of the present invention, Fig. 2 is a perspective view of both sides of a molding die in which the present invention is carried out; 11 is a sectional view taken along the line IV in FIG. 3, FIG. 5 is a perspective view without showing the supporting member, and FIG. ” The part that forms the hollow chamber in the firing head (Δ
FIG. 7 is a perspective view showing another embodiment of the present invention, and FIG. 7 is a longitudinal sectional view showing an embodiment of the recoilless urethane hammer of the present invention. 191. Handle, 210, ↑” 7 heads, 30. , hollow chamber,
493. Iron sand, 591. Core, 10.11, Molding mold, 12. ,,Single population, 1[),16. ,,
Blank space, 20. ,, wax part 1A, 25, , ten lids, 2
6. ,, Bin, 30.3161. Metal disc, 32.
,, out of metal, 35). 1. Metal barb.

Claims (1)

[Scope of Claims] 1. The handle of the hammer is made of urethane resin in the order of blows, and the hammer has a hollow chamber inside the head.
jL A recoilless urethane resin 7-0 with a core embedded in the center of the handle and a movable inertial material housed inside. A recoilless urethane hammer according to claim 7A1, wherein both metal plates are supported by a metal rod. 3. LP according to claim 1, characterized by a core of the handle
, B recoil urethane hammer. 4. A recoil urethane hammer according to claim 1, in which the core of the handle is made of a metal pipe. 5. In a method of injecting urethane resin into a mold to mold a hammer, The solder member is placed in a predetermined position in the mold, and after the urethane resin has hardened, the solder member is melted and removed to form a hollow chamber inside the J1 firing head and an end at the center of the handle, which communicates with the hollow chamber. 1. A recoil urethane hammer. Manufacturing method. 6. A supporting member consisting of a metal disk supported by a metal rod,
Embedded in the head of the wax member, 11;1 wax treatment I! r! rear,
6. The method for manufacturing a recoilless urethane hammer according to claim 5, wherein the supporting member protects both side walls of the hollow chamber within the J and FJ firing heads. 7. The handle part of the begging member is formed of a metal vibrator, and after dewaxing treatment, the core part of the handle of the hammer is formed.
A method for manufacturing a recoilless urethane hammer as described in . 8. The recoilless urethane according to claim 5, which is selected from urethane resins that are solidified at temperatures between 30 degrees Celsius and 100 degrees Celsius and aged at temperatures between 30 degrees Celsius and 110 degrees Celsius. How to make a hammer. 9. Heat the brazing member at a humidity between 60 degrees Celsius and 1'10 degrees C.
IWI! Ill? 7. Waxing /] Japan's selection, Waxing C molding Claim 5 JI Precept, Recoilless 1 Notan hammer manufacturing method, 7