TWI701128B - Method for manufacturing curved pneumatic tool casing - Google Patents

Abstract

The present invention provides a method for manufacturing a shell of a curved pneumatic tool. Initially, a pre-formed hollow tube is provided. The pre-formed hollow tube has a first port, a second port and a third port. The hollow tube is formed in a mold and the aforementioned ports are closed with a plurality of thimbles at the same time, and the thimbles respectively form a point so that the pre-formed hollow tube is positioned in the mold under the action of three fulcrums at the same time, and is injected into an injection molding The material is in the mold, the mold is removed and the thimble is taken out to obtain a semi-finished shell, which includes a first notch as the air inlet of the air inlet passage, a second notch communicating with a motor installation space, and a corresponding The third notch of the third port is provided with two plugs corresponding to the second notch and the third notch respectively to form the casing of the pneumatic tool.

Description

Method for manufacturing curved pneumatic tool casing

The invention relates to a method for manufacturing a curved pneumatic tool shell, in particular to a method for manufacturing a curved pneumatic tool shell made by injection molding.

The casing of the existing pneumatic machine tool is mainly made by casting, especially sand casting. When making the casing of the pneumatic tool machine in the foregoing manner, a casting mold is first preformed, and a material to be cast is poured into the casting mold. After the casing of the pneumatic tool is formed, the sand core is removed to make the pneumatic An air channel is formed inside the machine tool to complete the casing of the pneumatic machine tool used for conventional use.

However, the production efficiency of the casing of the pneumatic machine tool made by casting is slow and the mold cannot be used repeatedly, which increases the production cost. Furthermore, the main material of the casing of the pneumatic machine tool formed by casting is mostly metal. As a result, the casing of the pneumatic machine tool has a considerable weight, making it difficult for the operator to hold the pneumatic machine tool with the casing of the conventional pneumatic machine tool. .

The main purpose of the present invention is to provide a curved pneumatic tool casing made by injection molding.

To achieve the above object, the present invention provides a method for manufacturing a curved air tool housing. The curved air tool housing includes a motor installation space and an air inlet passage communicating with the motor installation space. The air inlet passage includes a first An intake section, a first turning section connected to the first intake section, a second intake section connected to the first turning section, and a second intake section connected to the second intake section Two steering sections and an air outlet section connected to the second steering section and connected to the motor installation space. The method includes the following steps: Step one provides a pre-formed hollow tube, the pre-formed hollow tube having a first port, A second port and a third port; step two, placing the pre-formed hollow tube in a mold and simultaneously sealing the first port, the second port and the third port with a plurality of thimble pins, the thimble pins A point is formed respectively so that the pre-formed hollow tube is positioned in the mold simultaneously by the action of the three fulcrums; step three, an injection molding material is injected into the mold, so that the injection molding material covers the pre-formed hollow tube After removing the mold and taking out the plugs, a semi-finished shell is obtained. The semi-finished shell is formed with the motor installation space, and the pre-formed hollow tube covered therein is used to form the air inlet passage, the air inlet passage and the The motor installation space is connected, and the semi-finished shell is affected by the ejector pins during the injection process to form a first port corresponding to the first port and communicating with the intake passage and serving as a first gap for the intake inlet, corresponding to the second port and communicating with the The second notch of the motor installation space corresponds to the third notch of the third port; step four, two plugs are used to respectively correspond to the second notch and the third notch to form the curved pneumatic tool housing.

In one embodiment, the pre-formed hollow tube includes a main pipe and a manifold connected to the main pipe. The main pipe includes a first extension section, a first bending section connected to the first extension section, and a first bending section connected to the first extension section. A second extension section of a bending section, a second bending section connecting the second extension section and a third extension section connecting the second bending section, the first port, the second port and the first port Three ports are respectively formed on the manifold, the first extension section and the third extension section.

In an embodiment, the manifold is connected to the first bending section of the main pipe.

In an embodiment, the manifold is connected to the second bending section of the main pipe.

In one embodiment, the preformed hollow tube is composed of a first straight tube and two second straight tubes respectively connected to the first straight tube. The extension direction of the first straight tube and the two second straight tubes The difference is that one end of the first straight pipe is closed, the other end is formed with the third port, and the two second straight pipes are not assembled with the first straight pipe at one end to respectively form the first port and the second port.

In one embodiment, the preformed hollow tube is made of a metal material or a plastic material.

According to the foregoing disclosure, compared with the conventional technology, the present invention has the following characteristics: the casing of the curved pneumatic tool of the present invention is injected with an injection molding material outside the pre-formed hollow tube to make the pre-formed hollow tube It can be integrally formed in the casing of the pneumatic machine tool, and through the present invention, the overall weight of the casing of the curved pneumatic machine tool can be reduced, and mass-produced to improve production efficiency.

10: Shell of curved pneumatic tool machine

11: Motor installation space

12: intake channel

121: First intake section

122: first turning section

123: second intake section

124: Second steering section

125: Exhaust section

126: intake inlet

13: shell semi-finished products

131: The first gap

132: The second gap

133: The Third Gap

20: Pre-formed hollow tube

21: The first port

22: second port

23: third port

24: Supervisor

241: first extension

242: first bending section

243: second extension

244: second bending section

245: Third Extension

25: Manifold

26: The first straight tube

27: Second straight pipe

28: The second straight pipe

30: Mould

31: Mould cavity

40, 41, 42: thimble

50: plug

60: Motor

70: Grinding components

80: Grip

S001: step one

S002: step two

S003: Step Three

S004: Step Four

FIG. 1 is a schematic diagram of the use of a curved pneumatic machine tool housing with an external structure according to an embodiment of the present invention.

Figure 2 is a flow chart of the steps of an embodiment of the present invention.

Fig. 3 is a perspective schematic view of a preformed hollow tube according to an embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of a preformed hollow tube according to an embodiment of the present invention.

Figure 5 is a schematic plan view of a preformed hollow tube connecting plug according to an embodiment of the present invention.

Fig. 6 is a schematic plan view of a preformed hollow tube connected to a plug and placed in a mold according to an embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view of a semi-finished housing of an embodiment of the present invention.

Fig. 8 is a perspective view of a preformed hollow tube according to another embodiment of the present invention.

Fig. 9 is a schematic plan view of a preformed hollow tube according to another embodiment of the present invention.

The detailed description and technical content of the present invention are described as follows with the drawings: 1 to FIG. 7, the present invention provides a method for manufacturing a curved pneumatic tool housing. Before describing the implementation of the manufacturing method, the basic structure of the curved pneumatic tool housing 10 is described here. And please refer to Figure 1, the curved pneumatic tool housing 10 is made by injection molding, the curved pneumatic tool housing 10 includes a motor installation space 11 and an air inlet passage 12, the motor installation space 11 and the inlet The air passages 12 communicate with each other, and the air intake passage 12 is continuously bent. Specifically, the air intake passage 12 includes a first air inlet section 121, and a first air inlet section 121 connected to the first air inlet section 121. A steering section 122, a second air intake section 123 connected to the first steering section 122, a second steering section 124 connected to the second air intake section 123, and a second steering section 124 connected to the motor installation The air outlet section 125 of the space 11. Wherein, the air intake passage 12 is a continuous bending direction of the first turning section 122 and the bending direction of the second turning section 124 may be the same or opposite according to the implementation.

Next, the manufacturing method of the present invention will be described. Please refer to FIGS. 1 to 7. The method includes steps: Step One S001: Provide a pre-formed hollow tube 20, the pre-formed hollow tube 20 has a first port 21, a The second port 22 and a third port 23; Step two S002: Place the pre-formed hollow tube 20 in a mold 30, and simultaneously use a plurality of thimble pins 40, 41, 42 to seal the first port 21 and the second port respectively. For the port 22 and the third port 23, the thimble pins 40, 41, 42 respectively form a fulcrum, so that the preformed hollow tube 20 is simultaneously positioned in the mold 30 under the action of the three fulcrums; step S003: injection-injection The molding material is placed in the mold 30, and the injection molding material is made to cover the preformed hollow tube 20. After the injection molding material is cured, the mold is retracted, and the thimbles 40, 41, 42 are taken out to obtain a semi-finished shell 13. The semi-finished shell 13 is formed with the motor installation space 11 and the air intake passage 12, and the semi-finished shell 13 is acted on by the thimble pins 40, 41, 42 during the injection process to form a corresponding first port 21 and communicate with each other The intake passage 12 serves as a first gap 131 of the intake inlet 126, corresponding to the second port 22 and the second notch 132 communicating with the motor installation space 11 corresponds to the third notch 133 of the third port 23; step 4 S004, two plugs 50 are used to respectively correspond to the second notch 132 and the third notch 133 , Make the shell 10 of the curved pneumatic tool.

To be more specific, at the beginning of implementation, the pre-formed hollow tube 20 is provided. The material of the pre-formed hollow tube 20 can be made of a metal material, a plastic material, or a ceramic material, and the pre-formed hollow tube 20 has the first port 21, the second port 22 and the third port 23. In one embodiment, the pre-formed hollow tube 20 may be composed of a main tube 24 and a manifold 25 connected to the main tube 24. Specifically, the main tube 24 includes a first extension section 241 connected to the first extension section The first bending section 242 of 241, a second extension section 243 connected with the first bending section 242, a second bending section 244 connected with the second extension section 243, and a second bending section 244 connected with the second bending section 244 The first port 21, the second port 22 and the third port 23 are respectively formed in the manifold 25, the first extension section 241 and the third extension section 243. In addition, the manifold 25 of the preformed hollow tube 20 can be selectively connected to the first bending section 242 or the second bending section 244 of the main pipe 24, as shown in FIGS. 3 and 8 . In addition, the main pipe 24 and the manifold 25 may be connected or disconnected. For the convenience of description, the preformed hollow tube 20 includes the main pipe 24 and the manifold 25, and the manifold 25 is provided on the second turning section 124 in the following description.

In this regard, please refer to FIG. 6 again. During the implementation of the second step S002, the thimble pins 40, 41, and 42 are used to seal the first port 21, the second port 22, and the third port of the preformed hollow tube 20, respectively. Port 23. After the pre-formed hollow tube 20 is placed in the mold 30, the fulcrums are formed through the thimble pins 40, 41, and 42 respectively and matched with the position of one of the mold cavities 31, so that the pre-formed hollow tube 20 is simultaneously received Third, the fulcrum function is positioned in the mold 30.

Continuing, please refer to FIG. 6 and FIG. 7 again to enter the step 3 S003, inject the injection molding material into the mold 30, and make the injection molding material cover the preformed hollow tube 20. After the injection molding material is cured, the mold is removed and the thimble pins 40, 41, 42 are taken out to obtain the semi-finished product 13 of the shell. The semi-finished shell 13 is formed with the basic structure of the shell 10 of the curved pneumatic machine tool. Further, the semi-finished shell 13 is formed with the motor installation space 11 and the air inlet passage 12. In addition, the air inlet passage 12 is formed by the pre-formed hollow tube 20 covered therein. Specifically, the first extension 241 of the main pipe 24 is the first air inlet section 121 of the air inlet passage 12 , And the first bending section 242 of the main pipe 24 corresponds to the first turning section 122 of the intake passage 12, the second extension section 243 corresponds to the second intake section 123, and the second bending section 244 corresponds to the second turning section 124, and the third extension section 245 of the main pipe 24 corresponds to the air outlet section 125 of the intake passage 12. Then, the first port 21, the second port 22, and the third port 23 of the pre-formed hollow tube 20 are released, so that the air intake passage 12 communicates with the motor installation space 11. In more detail, the semi-finished housing 13 is formed with the first notch 131, the second notch 132, and the third notch 133 by the action of the thimble pins 40, 41, 42, and the first notch 131 corresponds to the first port 21 is provided with and connected to the air inlet passage 12 and serves as the air inlet 126, the second gap 132 is provided corresponding to the second port 22 and communicates with the motor installation space 11, and the third gap 133 corresponds to the third port 23 Set up. Furthermore, the second notch 132 and the third notch 133 can be observed from the surface of the semi-finished shell 13. Next, referring to FIG. 1 again, the second gap 132 and the third gap 133 are filled with two plugs 50 to form the curved pneumatic tool housing 10.

According to the foregoing disclosure, the curved pneumatic tool housing 10 of the present invention is injected with the injection molding material outside the pre-formed hollow tube 20, so that the pre-formed hollow tube 20 can be formed in In the housing 10 of the curved pneumatic machine tool, and through an integral forming method, the housing 10 of the curved pneumatic machine tool can be manufactured in large quantities and quickly, thereby improving production efficiency.

In an embodiment, and please refer to FIG. 9, the pre-formed hollow tube 20 used in the housing 10 of the curved pneumatic tool of the present invention may have different shapes. Specifically, the pre-formed hollow tube 20 can be composed of a first straight tube 26 and two second straight tubes 27 and 28 respectively connected to the first straight tube 26, the first straight tube 26 and the second second straight tube 26 The straight pipes 27 and 28 extend in different directions. One end of the first straight pipe 26 is closed, and the other end of the first straight pipe 26 is formed with the third port 23. Furthermore, the first port 21 and the second port 22 are also formed at one end of the two second straight pipes 27 and 28 that are not combined with the first straight pipe 26.

On the other hand, referring to FIG. 1 again, the curved pneumatic tool housing 10 of the present invention is used with a motor 60, a grinding assembly 70 and a handle 80 when implemented. Specifically, the motor installation space 11 of the present invention is provided for the motor 60 to be installed therein, and the grinding assembly 70 is connected to the motor 60, and the grinding assembly 70 extends outside the motor installation space 11, and the handle 80 is arranged at the corner The housing 10 of the pneumatic tool machine is provided with one side of the air inlet passage 12, and the handle 80 is in communication with the air inlet passage 12. In addition, the handle 80 is connected to a pneumatic device (not shown in the figure), so that the gas of the pneumatic device can enter the air inlet passage 12 to communicate, and drive the grinding assembly 70 to perform grinding.

In summary, it is only a preferred embodiment of the present invention. When the scope of implementation of the present invention cannot be limited by this, that is, all equal changes and modifications made according to the scope of the patent application of the present invention shall still belong to the present invention. The scope of patent coverage.

S001: step one

S002: step two

S003: Step Three

S004: Step Four

Claims (6)

A method for manufacturing a curved air tool housing. The curved air tool housing includes a motor installation space and an air inlet passage communicating with the motor installation space. The air inlet passage includes a first air inlet section, and a first air inlet section connected to the motor installation space. A first steering section of the first intake section, a second intake section connected to the first steering section, a second steering section connected to the second intake section, and a second steering section connected to the second steering section and connected to the motor The air outlet section of the installation space, the method includes the following steps: step one, providing a pre-formed hollow tube having a first port, a second port and a third port; step two, inserting The pre-formed hollow tube is placed in a mold and simultaneously closed the first port, the second port and the third port with a plurality of thimbles. The thimbles respectively form a point to make the pre-formed hollow tube receive three The fulcrum is positioned in the mold; step three, inject an injection molding material into the mold, so that the injection molding material covers the preformed hollow tube, after the mold is ejected, the thimbles are taken out to obtain a semi-finished shell, The semi-finished shell is formed with the motor installation space, and the pre-formed hollow tube encapsulated therein is used to form the air inlet passage. The air inlet channel communicates with the motor installation space. The semi-finished shell is received by the ejector pins during the injection process. Function to form a pair of first notches corresponding to the first port and communicating with the intake passage and serving as the intake inlet, a pair of second notches corresponding to the second port and communicating with the motor installation space, corresponding to the first port of the third port Three notches; step four, use two plugs to correspond to the second notch and the third notch respectively to form the curved pneumatic tool shell. The method for manufacturing a curved pneumatic tool housing according to claim 1, wherein the pre-formed hollow pipe includes a main pipe and a manifold connected to the main pipe, and the main pipe includes a first extension section connected to the first The first bending section of the extension section, a second extension section connecting the first bending section, a second bending section connecting the second extension section, and a second bending section connecting the second extension section The third extension section of the bending section, the first port, the second port and the third port are respectively formed on the manifold, the first extension section and the third extension section. The method for manufacturing a casing of a curved pneumatic tool according to claim 2, wherein the manifold is connected to the first bending section of the main pipe. According to claim 2, the method for manufacturing a casing of a curved pneumatic tool, wherein the manifold is connected to the second bending section of the main pipe. The method for manufacturing a curved pneumatic tool housing according to claim 1, wherein the pre-formed hollow tube is composed of a first straight tube and two second straight tubes respectively connected to the first straight tube. The extension direction of the straight pipe is different from the two second straight pipes. One end of the first straight pipe is closed, and the other end is formed with the third port. The two second straight pipes are not assembled with the first straight pipe. One end forms the first port and the second port respectively. The method for manufacturing a casing of a curved pneumatic tool according to any one of claims 1 to 5, wherein the pre-formed hollow tube is made of a metal material, a plastic material, or a ceramic material.

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