WO2022078022A1

WO2022078022A1 - Tool case and manufacturing method therefor

Info

Publication number: WO2022078022A1
Application number: PCT/CN2021/110091
Authority: WO
Inventors: 王猛
Original assignee: 上海西美工具进出口有限公司
Priority date: 2020-10-17
Filing date: 2021-08-02
Publication date: 2022-04-21
Also published as: DE112021004906T5; CN112172088A

Abstract

Disclosed in the present invention are a tool case and a mold therefor. The tool case comprises a cover body integrally formed and an injection molded part integrally formed together with the cover body; the cover body is further provided with an embedding groove for accommodating the injection molded part; the mold comprises a male die part and a female die part which are arranged at intervals and forming the cover body, and a preform die for providing a tubular plastic preform for forming the cover body; the tubular plastic preform is formed and clamped between the male die part and the female die part; a first fixed part in which the injection molded part is embedded is provided around a position of the male die part for forming one of an upper cover and a lower cover; the injection molded part is fixed to the first fixed part to form the embedding groove of the cover body in a filling manner, and the injection molded part is wrapped by the cover body. By means of arrangement of the first fixed part on the male die part, the injection molded part is fixed to the first fixed part, so that the injection molded part implements filling to form the embedding groove on the cover body, and the injection molded part and the cover body are well combined together.

Description

Tool box and method of making the same

This application claims the priority of the Chinese patent application with an application date of October 17, 2020, an application number of 202011113757.3, and an invention title of "tool box and its manufacturing method", the entire contents of which are incorporated into this application by reference.

technical field

The present invention relates to a tool box and a manufacturing method thereof, in particular to a tool box and a manufacturing method thereof, which can better form a cover body and an injection part of the tool box together.

Background technique

Taiwan Invention Patent No. TWI348961 discloses a tool box structure, including a hollow box body, a soft covering part and a frame part, wherein the frame part is formed on the said The box body, under the current trend of miniaturization, adopts the matching structure in this way, the binding force is limited, and the frame parts are easy to fall off in the process of frequent use.

Therefore, it is necessary to provide a new tool box and its manufacturing method to overcome the above-mentioned defects.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a tool box and a manufacturing method thereof, which can better shape the cover body of the tool box and the injection part together.

The object of the present invention is achieved by the following technical solution: a tool box, comprising a hollow plastic cover made of a hollow blowing plastic mold and an injection molded part integrally formed with the cover, the cover An accommodating portion for accommodating tools is formed on the inner side, and the cover body includes an upper cover integrally formed, a lower cover forming the accommodating portion with the upper cover, and a connecting portion integrally connecting the upper cover and the lower cover. The cover body is further provided with an embedding groove for receiving the injection molded parts, and the mold includes a male mold part and a female mold part that are separated and spaced apart for forming the cover body and are located in the male mold part and the female mold part. A parison die head is suspended above the midpoint position of the connecting line, the parison die head has a tubular plastic parison for forming the cover body, and the tubular plastic parison is formed on the punch part and the concave part. between the mold parts and jointly clamped by the male mold part and the female mold part to form the tool box, the male mold part clamps one side of the tubular plastic parison to form the upper cover and Inside the lower cover, the female mold part clamps the other side of the tubular plastic parison to form the upper cover and the outside of the lower cover, and the male mold part forms the upper cover and the lower cover correspondingly. A first fixing part embedded in the injection molded part is arranged around one position of the lower cover; The piece is wrapped by the cover.

Further, the material of the tubular plastic parison is different from the material of the injection molded part, so that the degree of thermal expansion and contraction of the tubular plastic parison at the same temperature is greater than the degree of thermal expansion and contraction of the injection molded part. The injection molded part is held in the insert groove and wrapped by the tubular plastic parison.

Further, the injection molded part is fixed to the first fixing portion by an external force.

Further, the injection molded part is vacuum adsorbed to the first fixing part.

Further, the injection molded part includes a frame portion formed around the upper cover, the upper cover includes a first bottom wall and a first peripheral wall formed around the first bottom wall, the embedded The groove is a second inserting groove which is arranged around the first peripheral wall for the frame portion to be engaged and held, and the first fixing portion and the second inserting groove are disposed on opposite sides of the frame portion.

Further, a second fixing part is provided on the outer part of the female mold part corresponding to one of the upper cover and the lower cover; The marking part of the first embedding groove of the cover body, the second fixing part and the first embedding groove are arranged on opposite sides of the marking part.

Further, the injection molded part forms at least one turn.

Further, the first peripheral wall further comprises a pair of longitudinally extending first long walls and a pair of first wide walls extending in a transverse direction perpendicular to the longitudinal direction connecting the pair of first long walls, A pair of the first wide walls includes one of the first wide walls connected to the lower cover via a connecting portion and the other first wide wall on the side away from the lower cover, the A first wide wall on one side of the lower wall is provided with a first concave portion arranged in the middle position and a pair of first grooves disposed on the lateral sides of the pair of the first concave portions, and the frame portion includes corresponding A third concave portion provided in the first concave portion and a third groove provided corresponding to the first groove, and the turning point is formed in the third concave portion and the third groove.

Further, the second embedding grooves are arranged corresponding to the contours around the first peripheral wall.

Further, the lower cover includes a second bottom wall and a second peripheral wall formed around the second bottom wall, the second peripheral wall includes a pair of second long walls arranged along the vertical direction and a connecting A pair of second wide walls of the second long wall extending along the lateral direction, one of the second wide walls is provided with a second concave portion corresponding to the first concave portion and a second groove located on both lateral sides of the second recessed portion corresponding to the first groove, the first groove and the second groove are respectively provided with a convex block and a snap block, the The tool box is also provided with a buckle lip which is buckled and held on the protruding block and the buckle block to open and close the cover body.

The object of the present invention is realized by following technical scheme two: a kind of manufacture method of manufacturing tool box, comprises the steps:

The first step is to provide a hollow blow molding mold, the mold includes a punch part and a female mold part that are separated and opposite to each other for forming the tool box, and a connection between the punch part and the female mold part. The parison die head is suspended above the midpoint of the line, the parison die head has a tubular plastic parison for forming the cover body, and the punch part is provided with a first part that surrounds the cover body. a fixing part, a second fixing part is provided on the die part corresponding to the middle position of the cover body;

In the second step, an injection molded part is provided, and the injection molded part is fixed on the first fixing part and the second fixing part;

The third step is to open the parison die head to release the tubular plastic parison between the punch part and the concave die part. When the tubular plastic parison is extruded to a certain length, the punch part and the concave die part begin to close together. mold;

The fourth step, after the mold is closed, the tubular plastic parison begins to slowly cool and solidify in the mold. When the solidification reaches a certain level, the blowing hole on the punch part starts to inhale under the control of the solenoid valve, and the gas pressure will make the tubular plastic parison. Different sides are extruded to opposite sides of the female part and the male part;

The fifth step, under the action of gas pressure and mold cooling, the tubular plastic parison is completely solidified and shaped in the mold, and the tubular plastic parison tightly wraps the injection molded part under the action of high-pressure gas;

The sixth step, after the product is cured and formed, the mold is opened, the ejector pin is ejected, and the product is manually taken out; the excess waste material is initially trimmed; the product is finely trimmed to remove the excess flash; finally, the product after trimming the flash is burned with a musket to make it fly. The edge is passivated to avoid the burrs on the burrs from hurting the user.

Further, the injection-molded part includes a frame portion fixedly positioned on the first fixing portion and a marker portion fixedly positioned on the second fixing portion, and the frame portion and the marker portion are positioned on the side of the tubular plastic parison. opposite sides.

Further, in the process of the second step of manufacturing the tool box, the frame portion and the marking portion are respectively fixed to the first fixing portion and the second fixing portion by external force.

Further, in the process of the second step of manufacturing the tool box, the frame portion and the marking portion are vacuum adsorbed to the first fixing portion and the second fixing portion, respectively.

In the tool box of the present invention, through the relative arrangement of the male part and the female part of the mold, the injection part is fixed on the part of the male part that forms the inside of the cover, so that the injection part can occupy space , forming an embedded groove on the cover, so that the injection part can be well combined with the cover when molding the cover, and no additional components are required. Under the trend of miniaturization, it can also be well fixed between the two.

Description of drawings

Fig. 1 is the perspective view when the tool box of the present invention is closed;

Fig. 2 is the perspective view when the tool box of the present invention is opened;

Fig. 3 is the perspective exploded view of the tool box of the present invention;

Fig. 4 is another perspective exploded view of the tool box of the present invention;

Fig. 5 is other perspective exploded view of the tool box of the present invention;

Fig. 6 is the perspective view of the mold of the tool box of the present invention;

7 is a front view of the ejector in the mold of the present invention;

Fig. 8 is the front view of the punch part of the ejector device in the present invention;

Fig. 9 is a front view of the die portion of the ejector device in the present invention.

Detailed ways

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the orientations or positional relationships shown in the accompanying drawings, only for the purpose of It is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

Hereinafter, the tool box 100 and the mold 200 thereof of the present invention will be described with reference to FIGS. 1 to 9 .

Referring to FIGS. 1 to 9 , the tool box 100 includes a cover body and an injection molded part 3 integrally formed with the cover body. The cover body is a hollow plastic made of a hollow blowing plastic molding die 200 , and a plurality of accommodating portions 10 of different shapes and sizes are formed on the inside of the cover body for accommodating tools. The insertion groove of the part 3, the injection part 3 is embedded in the position on the mold 200 corresponding to the insertion groove when the cover body is formed, the material of the cover body and the injection part 3 are different so that under the same temperature The degree of thermal expansion and contraction of the cover body is greater than the degree of thermal expansion and contraction of the injection molded part 3 so that the injection molded part 3 is held in the insertion groove.

Referring to FIG. 1 to FIG. 5 , the cover body includes an upper cover 1 integrally formed, a lower cover 2 forming the receiving portion 10 with the upper cover 1 , and a connection connecting the upper cover 1 and the lower cover 2 . connection part 4. The upper cover 1 includes a first bottom wall 11 and a first peripheral wall 12 surrounding the first bottom wall 11 to form a plurality of the receiving portions 10 . The outer surface of the first bottom wall 11 is provided with a first embedding groove 111 , and the first embedding groove 111 is located in the middle of the outer surface of the first bottom wall 11 . The first peripheral wall 12 includes a pair of separated first wide walls 121 extending in the lateral direction and a pair of first long walls 122 extending in the longitudinal direction connecting the pair of the first wide walls 121 . One of the first wide walls 121 and the lower cover 2 are connected together via the connecting portion 4 . The other first wide wall 121 is provided with a first concave portion 14 and a first handle portion 15 extending in the longitudinal direction in the first concave portion 14 . The first handle portion 15 is connected to the opening of the first recessed portion 14 in the lateral direction. The first wide wall 121 located on the outer side is also provided with first grooves 13 formed concavely on both sides of the first concave portion 14 in the lateral direction, and each of the first grooves 13 is provided with a convex Block 131. The depth of the first groove 13 in the longitudinal direction is smaller than the depth of the first recessed portion 14 in the longitudinal direction.

Referring to FIGS. 1 to 5 , the lower cover 2 includes a second bottom wall 21 and a second peripheral wall 22 surrounding the second bottom wall 21 to form a plurality of the receiving portions 10 . The second peripheral wall 22 is correspondingly provided with a second embedding groove 211 extending along the outer contour of the second peripheral wall 22 . The second peripheral wall 22 includes a pair of separate second wide walls 221 extending in the lateral direction and a pair of second long walls 222 extending in the longitudinal direction connecting the pair of the second wide walls 221 . One of the second wide walls 221 and the first wide walls 121 are connected together via the connecting portion 4 . The second wide wall 221 of the other is provided with a second concave portion 24 and a second handle portion 25 located in the second concave portion 24 extending in the longitudinal direction. The second handle portion 25 is connected to the opening of the second recessed portion 24 in the lateral direction. The second wide wall 221 located on the outer side is also provided with a pair of second grooves 23 recessed on both sides of the second recessed portion 24 in the lateral direction, and each of the second grooves 23 is provided in the A buckle portion 231 . The depth of the second groove 23 in the longitudinal direction is smaller than the depth of the second recessed portion 24 in the longitudinal direction. The first concave portion 14 is disposed corresponding to the second concave portion 24 , and the first groove 13 is disposed corresponding to the second groove 23 . The tool box 100 further includes a pair of locking lips 5 that are fastened to the protruding block 131 and the locking portion 231 .

In this embodiment, the injection molded part 3 is fixedly pressed into the corresponding position of the embedding groove by external force during fixed molding. The corresponding position of the embedded groove. In this way, when the injection molded parts are fixed at the corresponding positions of the embedding grooves (the positions of the punch part and the concave mold part mentioned above), and then under the action of high temperature, the cover body expands and contracts with heat, wrapping the injection parts, which is very good. hold both. The material of the cover body is different from that of the injection molded part. Generally, the material of the cover body includes polyethylene, polyvinyl chloride, polypropylene, and polyester. In this embodiment, the material of the cover body is high-density polyethylene. .

The injection molded part 3 includes a frame portion 31 embedded around one of the upper cover 1 and the lower cover 2 and a middle position embedded in the surface of one of the upper cover 1 and the lower cover 2 . 32 of the logo part. The setting positions of the frame part 31 and the marking part 32 are not necessarily related, because the frame part 31 is embedded along the periphery of the cover body, and the marking part 32 is located in the middle position of the outer surface of the cover body. In this embodiment, the frame portion 31 is arranged around the lower cover 2 , and the marking portion 32 is located in the middle of the outer surface of the upper cover 1 for marking. The frame portion 31 and the sign portion 32 respectively form at least one turning point. During the molding process, the material of the cover body can better wrap the frame portion 31 and the sign portion 32, so that the cover body and the injection molded part 3 can be better formed. combine. In this embodiment, the frame portion 31 is disposed corresponding to the second peripheral wall 22 and has a pair of third wide walls 311 corresponding to the second wide walls 221 and a pair of third wide walls 311 connected to the pair of the third wide walls 311 . The third long wall 312 is disposed corresponding to the second long wall 222 . One of the third wide walls 311 of the frame portion 31 is provided with a third recess 314 corresponding to the second recess 24 and a third recess 313 corresponding to the second recess 23 . Here, the third concave portion 314 and the third groove 313 have a turning point, which can be better held by the cover. The size of the third recessed portion 314 is slightly smaller than the size of the second recessed portion 24 , and the size of the third groove 313 is slightly smaller than the size of the second recessed portion 23 .

In the present embodiment, the marking part 32 is embedded in the middle position of the exposed surface of the upper cover 1 with the words "KENDO". This lettering also exists in the setting of the corner, which can also be better held by the cover.

Referring to FIGS. 6 to 9 , the mold 200 includes an electric motor 201 for driving the machine, a barrel 202 for loading the material for forming the tool box 100 , an ejector 205 for forming the tool box 100 , The feeding tube 203 of the ejector 205 and a safety door 204 which is closed to prevent danger during production.

The ejecting device 205 has a relatively spaced apart male part 2051 and a female part 2052, and a hanging above the midpoint of the line between the male part 2051 and the female part 2052 for removing A parison die 2057 for extruding the material from the tool box. A circulating cooling circuit 2053 is provided on the male part 2051 and the female part 2052 for cooling. The punch part 2051 is provided with an ejector pin 2054 and a blow hole 2055 for ejecting the formed material. The parison die 2057 has a tubular plastic parison 20571 for forming the cover body, and the tubular plastic parison 20571 is formed between the male part 2051 and the female part 2052 and sandwiched by both to form the outer part. The tool box 100 is described. The male mold part 2051 clamps one side of the tubular plastic parison 20571 to form the inside of the upper cover 1 and the lower cover 2, and the female mold part 2052 clamps the tubular plastic parison 20571. The other side is used to form the outside of the upper cover 1 and the lower cover 2 . A first fixing part 2056 embedded in the injection molded part 3 is provided around the position of the male part 2051 corresponding to one of the upper cover 1 and the lower cover 2, and the female mold part 2052 is formed correspondingly. An outer position of one of the upper cover 1 and the lower cover 2 forms a second fixing portion 20521 embedded in the injection molded part 3 . The injection molded part 3 includes a frame portion 31 fixed to the first fixing portion 2056 to form the second insertion groove 211 of the cover, and a frame portion 31 fixed to the second fixing portion 20521 to form the cover The marking portion 32 of the first insertion groove 111 of the body.

The material of the tubular plastic parison 20571 is different from the material of the injection molded part 3 so that the degree of thermal expansion and contraction of the tubular plastic parison 20571 is greater than the thermal expansion and contraction of the injection molded part 3 at the same temperature. such that the injection-molded part 3 is held in the insertion groove 111 / 211 and wrapped by the tubular plastic parison 20571 .

A method of manufacturing the tool box is as follows: the first step is to provide a mold for hollow blow molding, the mold includes a male mold part 2051 and a female mold part 2052 that are opposite to each other for forming the tool box and are located at a distance. A parison die 2057 is suspended above the midpoint of the connection line between the male part 2051 and the female part 2052. The parison die 2057 has a tubular plastic parison 20571 for forming the cover. , the male mold part 2051 is provided with a first fixing part 2056 arranged around the cover body, and the female mold part 2052 is provided with a second fixing part 20521 corresponding to the middle position of the cover body;

In the second step, an injection molded part 3 is provided. The injection molded part 3 includes a frame part 31 fixedly occupying the first fixing part 2056 and a sign part 32 fixedly occupying the second fixing part 20521. The frame part 31 And the marking parts 32 are located on opposite sides of the tubular plastic parison 20571, and the injection molded parts 3 are loaded into the first fixing part 2056 and the second fixing part 20521, and one of the methods of loading is to press with external force. The second method is to put the injection molded parts into the mold with external force, and then use vacuum adsorption to make the two fit tightly;

The third step is to open the parison die 2057 to release the tubular plastic parison 20571 between the punch part 2051 and the die part 2052. When the tubular plastic parison is extruded to a certain length, the punch part 2051 and The die part 2052 begins to mold;

In the fourth step, after the mold is closed, the tubular plastic parison 20571 begins to slowly cool and solidify in the mold. When the solidification reaches a certain level, the air blowing hole 2055 on the punch part 2051 begins to take in air under the control of the solenoid valve, and the gas pressure blows the tubular plastic material. Different sides of the parison 20571 are extruded to opposite sides of the female die part 2052 and the male die part 2051, respectively;

The fifth step, under the action of gas pressure and mold cooling, the tubular plastic parison 20571 is completely solidified and shaped in the mold, and the tubular plastic parison 20571 tightly wraps the injection molded part 3 under the action of high-pressure gas;

Since the male mold part 2051 and the female mold part 2052 are clamped on opposite sides of the tubular plastic parison 20571 , when the tubular plastic parison 20571 forms the tool box 100 , the male mold part 2051 is formed. The inside of the upper cover 1 and the lower cover 2 , and the die portion 2052 molds the outside of the upper cover 1 and the lower cover 2 . The injection molded part 3 includes a frame portion 31 that is fixedly located at the first fixing portion 2056 and a marking portion 32 that is fixedly located at the second fixing portion 20521. The frame portion 31 and the marking portion 32 are located in the Opposite sides of a tubular plastic parison 20571. Due to the space-occupying design of the frame portion 31 and the marking portion 32 , the tubular plastic parison 20571 is held in the first embedding groove 111 of the marking portion 32 when the upper cover 1 and the lower cover 2 are formed. and the second insertion groove 211 held on the frame portion 31 is reserved.

In the present invention, through the relative arrangement of the male part 2051 and the female part 2052 of the mold 200 , the injection part 3 is fixed on the male part 2051 for molding the inside of the cover, so that the injection part 3 can be realized Occupying the space, the insert groove is formed on the cover body, so that the injection part and the cover body can be well combined when molding the cover body, and no additional components are required. Under the trend of miniaturization, it can also be The fixation between the two is well done. At the same time, since the injection-molded part has different turns (the third groove 313, the third concave part 214, etc.), the cover body can better hold the injection-molded part.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or some or all of the technical features thereof are equivalently replaced; these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

The above descriptions are only part of the embodiments of the present invention, not all of the embodiments. Any equivalent changes to the technical solutions of the present invention taken by those of ordinary skill in the art by reading the description of the present invention are covered by the claims of the present invention. .

Claims

A tool box includes a hollow plastic cover body made of a hollow blowing plastic mold and an injection molded part integrally formed with the cover body, the inside of the cover body is formed with a accommodating part for accommodating tools, the cover The body includes an integrally formed upper cover, a lower cover that forms the receiving portion with the upper cover, and a connecting portion that integrally connects the upper cover and the lower cover, and is characterized in that the cover body is further provided with a receiving place The embedding groove of the injection molded part, the mold comprises a male mold part and a female mold part that are oppositely arranged at a separation interval for forming the cover body, and a middle point position of the connecting line between the male mold part and the female mold part. A parison die head suspended above, the parison die head has a tubular plastic parison for forming the cover body, the tubular plastic parison is formed between the male part and the female part and is formed by the The male mold part and the female mold part are jointly clamped to form the tool box, and the male mold part clamps one side of the tubular plastic parison to form the interior of the upper cover and the lower cover, so The female mold part clamps the other side of the tubular plastic parison to form the outer part of the upper cover and the lower cover, and the male mold part corresponds to the position of forming one of the upper cover and the lower cover A first fixing part embedded in the injection molded part is arranged around the periphery of the injection molding part, the injection molded part is fixed on the first fixing part to form an embedding groove of the cover body, and the injection molded part is wrapped by the cover body.
The tool box according to claim 1, wherein the material of the tubular plastic parison is different from the material of the injection molded part, so that the degree of thermal expansion and contraction of the tubular plastic parison is greater than that of the tubular plastic parison at the same temperature The degree of thermal expansion and contraction of the injection molded part allows the injection molded part to be held in the insertion groove and wrapped by the tubular plastic parison.
The tool box of claim 2, wherein the injection molded part is fixed to the first fixing portion by an external force.
The tool box of claim 3, wherein the injection molded part is vacuum adsorbed to the first fixing portion.
3. The tool box of claim 2, wherein the injection-molded part includes a frame portion formed around the upper cover, and the upper cover includes a first bottom wall and surrounds the first bottom The first peripheral wall is formed around the wall, and the embedded groove is a second embedded groove ringed on the first peripheral wall for the frame portion to be clamped and held, and the first fixed portion and the second embedded groove are located at the The frame parts are arranged on opposite sides.
6. The tool box according to claim 5, wherein a second fixing portion is provided on the outer portion of the die portion corresponding to one of the upper cover and the lower cover, and the injection molded part further comprises a fixing portion fixed on the outer portion of the upper cover and the lower cover. The second fixing portion forms the marking portion 32 of the first inserting groove of the cover by occupying space, and the second fixing portion and the first inserting groove are disposed on opposite sides of the marking portion.
The tool box according to claim 6, wherein the injection molded part forms at least one turn.
8. The tool box of claim 7, wherein the first peripheral wall further comprises a pair of longitudinally extending first long walls and a pair of first long walls connecting the pair of first long walls along a direction perpendicular to the longitudinal direction A pair of first wide walls extending in the lateral direction of the Another first wide wall, the first wide wall on the side away from the lower cover is provided with a first concave portion arranged in the middle position and a pair of first concave portions disposed on the lateral sides of the pair of first concave portions. a groove, the frame portion includes a third concave portion corresponding to the first concave portion and a third groove disposed corresponding to the first groove, the turning point is formed in the third concave portion and the third groove.
8. The tool box according to claim 8, wherein the second embedding groove is arranged corresponding to the contour around the first peripheral wall.
9. The tool box of claim 9, wherein the lower cover comprises a second bottom wall and a second peripheral wall formed around the second bottom wall, the second peripheral wall comprises a pair of A second long wall arranged in a vertical direction and a pair of second wide walls extending in a lateral direction connecting a pair of the second long walls, and one of the second wide walls is provided with a corresponding A second recess provided in the first recess and a second recess located on both lateral sides of the second recess corresponding to the first recess, the first recess and the second recess are respectively provided There are protruding blocks and snap blocks, and the tool box is also provided with a snap lip which is buckled and held on the protruding blocks and the snap blocks to open and close the cover body.
A method of manufacturing the tool box as claimed in claim 1, characterized in that: comprising the steps of:

The first step is to provide a hollow blow molding mold, the mold includes a punch part and a female mold part that are separated and opposite to each other for forming the tool box, and a connection between the punch part and the female mold part. The parison die head is suspended above the midpoint of the line, the parison die head has a tubular plastic parison for forming the cover body, and the punch part is provided with a first part that surrounds the cover body. a fixing part, a second fixing part is provided on the die part corresponding to the middle position of the cover body;

In the second step, an injection molded part is provided, and the injection molded part is fixed on the first fixing part and the second fixing part;

The third step is to open the parison die head to release the tubular plastic parison between the punch part and the concave die part. When the tubular plastic parison is extruded to a certain length, the punch part and the concave die part begin to close together. mold;

The fourth step, after the mold is closed, the tubular plastic parison begins to slowly cool and solidify in the mold. When the solidification reaches a certain level, the blowing hole on the punch part starts to inhale under the control of the solenoid valve, and the gas pressure will make the tubular plastic parison. Different sides are extruded to opposite sides of the female part and the male part;

The fifth step, under the action of gas pressure and mold cooling, the tubular plastic parison is completely solidified and shaped in the mold, and the tubular plastic parison tightly wraps the injection molded part under the action of high-pressure gas;

The sixth step, after the product is cured and formed, the mold is opened, the ejector pin is ejected, and the product is manually taken out; the excess waste material is initially trimmed; the product is finely trimmed to remove the excess flash; finally, the product after trimming the flash is burned with a musket to make it fly. The edge is passivated to avoid the burrs on the burrs from hurting the user.
11. The manufacturing method of the tool box according to claim 11, wherein the injection molded part comprises a frame part fixedly occupying the first fixing part and a sign part fixedly occupying the second fixing part, The frame portion and the marking portion are located on opposite sides of the tubular plastic parison.
12. The method for manufacturing a tool box according to claim 12, wherein in the process of the second step of manufacturing the tool box, the frame part and the marking part are respectively fixed to the first and second parts by external force. a fixing part and the second fixing part.
12. The method for manufacturing a tool box as claimed in claim 12, wherein in the process of the second step of manufacturing the tool box, the frame part and the marking part are vacuum adsorbed to the first fixed part respectively. part and the second fixing part.