CN112743750A - Encapsulating process for screwdriver handle - Google Patents
Encapsulating process for screwdriver handle Download PDFInfo
- Publication number
- CN112743750A CN112743750A CN202011564266.0A CN202011564266A CN112743750A CN 112743750 A CN112743750 A CN 112743750A CN 202011564266 A CN202011564266 A CN 202011564266A CN 112743750 A CN112743750 A CN 112743750A
- Authority
- CN
- China
- Prior art keywords
- handle
- screwdriver
- soft rubber
- skeleton
- encapsulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14549—Coating rod-like, wire-like or belt-like articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14819—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being completely encapsulated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/28—Tools, e.g. cutlery
- B29L2031/283—Hand tools
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a screwdriver handle encapsulating process, which comprises the following steps: step one, using nylon as a raw material, heating and melting the nylon, injecting the nylon into a screwdriver handle skeleton mold, maintaining pressure and cooling to obtain a screwdriver handle skeleton, and then opening the mold to take out the screwdriver handle skeleton for cooling and shaping at room temperature; and secondly, placing the cooled and shaped screwdriver handle framework in a soft rubber injection mold, forming a molding cavity of soft rubber together with a preset mold cavity of the soft rubber injection mold, heating and melting the soft rubber, injecting the molten soft rubber into the molding cavity, and forming a coating layer after pressure maintaining and cooling to obtain a finished product of the screwdriver handle. Through the steps, the thermoplastic soft rubber can firmly cover the handle, and the handle cannot slip when in use.
Description
Technical Field
The invention relates to the field of electrician tools, in particular to a process for encapsulating a handle of a screwdriver.
Background
The common screwdriver generally uses a wood handle or a plastic handle, the hardness of the screwdriver handle is high, so that if the screw is tightly installed in the using process, the manual operation is labor-consuming, the holding position is not comfortable enough, and sometimes a rubber handle sleeve is sleeved on the screwdriver handle in order to improve the holding comfort, but the handle sleeve is not enough in the using process and is easy to slip due to the fact that the handle sleeve is not tightly attached to the screwdriver handle.
Disclosure of Invention
The invention mainly solves the technical problem of providing a process for encapsulating a handle of a screwdriver, which can improve the comfort degree of a handle sleeve and can not slip.
In order to solve the technical problems, the invention adopts a technical scheme that: the encapsulating process of the screwdriver handle comprises the following steps:
step one, using nylon as a raw material, heating and melting the nylon, injecting the nylon into a screwdriver handle skeleton mold, maintaining pressure and cooling to obtain a screwdriver handle skeleton, and then opening the mold to take out the screwdriver handle skeleton for cooling and shaping at room temperature;
and secondly, placing the cooled and shaped screwdriver handle framework in a soft rubber injection mold, forming a molding cavity of soft rubber together with a preset mold cavity of the soft rubber injection mold, heating and melting the soft rubber, injecting the molten soft rubber into the molding cavity, and forming a coating layer after pressure maintaining and cooling to obtain a finished product of the screwdriver handle.
In a preferred embodiment of the present invention, the processing temperature of the soft rubber in the second step is at least 20 ℃ lower than the processing temperature of the nylon in the first step.
In a preferred embodiment of the present invention, the raw material for the framework is glass fiber reinforced PA6 or PA66 material.
In a preferred embodiment of the invention, the addition amount of the glass fiber is 15-30%.
In a preferred embodiment of the present invention, the screwdriver handle skeleton obtained in the first step needs to be subjected to a heat treatment to remove internal stress before being encapsulated.
In a preferred embodiment of the present invention, the heat treatment is to bake the screwdriver handle frame in an oven at 70-90 ℃ for 5-10 min.
In a preferred embodiment of the present invention, the soft rubber is a thermoplastic elastomer or EPDM rubber.
In a preferred embodiment of the invention, a plurality of groups of groove ridge structures are longitudinally arranged on the contact surface of the screwdriver handle framework and the soft rubber, and the distances between each group of groove ridge structures are equal.
The invention has the beneficial effects that: according to the invention, the secondary injection molding mode is adopted to cover the layer of soft rubber by relying on the handle framework of the screwdriver, so that the comfort of a user in holding can be improved under the condition of not influencing the holding posture, the injury of the counterforce to the hand section is reduced, and therefore, a user can have more residual force to use on the handle of the screwdriver in use, and the twisting force of the screwdriver is improved.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.
The content of a preferred embodiment of the invention comprises:
the encapsulating process of the screwdriver handle comprises the following steps:
step one, using chopped glass fiber filled 30% nylon 6 as a raw material, heating and melting at a processing temperature of 240-260 ℃, injecting into a screwdriver handle skeleton mold, maintaining pressure and cooling to obtain a screwdriver handle skeleton, then opening the mold to take out the screwdriver handle skeleton, cooling and shaping at room temperature, after cooling and shaping the screwdriver handle skeleton, putting the screwdriver handle skeleton into an oven to bake for 5min at 70-90 ℃, removing the internal stress of the handle skeleton, preventing the handle from being thick and deforming after long-term placement;
and secondly, placing the stress-removed screwdriver handle framework in a soft rubber injection mold, forming a molding cavity of soft rubber together with a preset mold cavity of the soft rubber injection mold, heating and melting the soft rubber, injecting the molten soft rubber into the molding cavity, and forming a coating layer after pressure maintaining and cooling to obtain a finished product of the screwdriver handle, wherein the soft rubber is EPDM rubber, the processing temperature of the EPDM rubber is 150-210 ℃, and the short-term high temperature in the soft rubber molding process can not cause the deformation of the screwdriver handle framework.
Injection moulding's screwdriver handle skeleton and the contact surface of flexible glue are along vertically setting up 4 group bank structures, and the distance between every group bank structure equals, improves the cohesion between flexible glue and the screwdriver handle skeleton and the transverse resistance when rotating to effectively prevent that the user from skidding between glue film and the skeleton when twisting the screw, influencing and twisting the dynamics.
Another preferred embodiment of the present invention comprises:
the encapsulating process of the screwdriver handle comprises the following steps:
step one, using chopped glass fiber filled 15% nylon 66 as a raw material, heating and melting at a processing temperature of 270-310 ℃, injecting into a screwdriver handle skeleton mold, carrying out pressure maintaining and cooling to obtain a screwdriver handle skeleton, then opening the mold, taking out the screwdriver handle skeleton, cooling and shaping at room temperature, after cooling and shaping the screwdriver handle skeleton, putting the screwdriver handle skeleton into an oven, baking for 10min at 70-90 ℃, removing the internal stress of the handle skeleton, preventing the handle from being thick and deforming after long-term placement;
and secondly, placing the screwdriver handle skeleton subjected to stress removal in a soft rubber injection mold, forming a molding cavity of soft rubber together with a preset mold cavity of the soft rubber injection mold, heating and melting the soft rubber, injecting the molten soft rubber into the molding cavity, and forming a coating layer after pressure maintaining and cooling to obtain a finished product of the screwdriver handle, wherein the soft rubber is a TPE (thermoplastic elastomer) special for nylon encapsulation, the processing temperature of the TPE elastomer is 210-240 ℃, and the short-term high temperature in the soft rubber molding process can not cause the deformation of the screwdriver handle skeleton.
Injection moulding's screwdriver handle skeleton and the contact surface of flexible glue are along vertically setting up 4 group bank structures, and the distance between every group bank structure equals, improves the cohesion between flexible glue and the screwdriver handle skeleton and the transverse resistance when rotating to effectively prevent that the user from skidding between glue film and the skeleton when twisting the screw, influencing and twisting the dynamics.
In yet another preferred embodiment of the present invention includes,
the encapsulating process of the screwdriver handle comprises the following steps:
step one, using 20% nylon 6 filled with chopped glass fibers as a raw material, heating and melting at a processing temperature of 250-270 ℃, injecting into a screwdriver handle skeleton mold, maintaining pressure and cooling to obtain a screwdriver handle skeleton, then opening the mold to take out the screwdriver handle skeleton, cooling and shaping at room temperature, after cooling and shaping the screwdriver handle skeleton, putting the screwdriver handle skeleton into an oven to bake for 10min at 70-90 ℃, removing the internal stress of the handle skeleton, preventing the handle from being thick and deforming after long-term placement;
and step two, placing the screwdriver handle skeleton after stress removal in a soft rubber injection mold, forming a molding cavity of soft rubber together with a preset mold cavity of the soft rubber injection mold, then heating and melting the soft rubber, injecting the molten soft rubber into the molding cavity, and forming a coating layer after pressure maintaining and cooling to obtain a finished product of the screwdriver handle, wherein the soft rubber is a TPR (thermal plastic rubber) elastomer, the processing temperature of the TPR elastomer is 200-230 ℃, and short-term high temperature in the soft rubber molding process cannot cause deformation of the screwdriver handle skeleton.
Contact surface along vertically setting up 6 group bank structures of injection moulding's screwdriver handle skeleton and flexible glue, the distance between every group bank structure equals, improves the cohesion between flexible glue and the screwdriver handle skeleton and the transverse resistance when rotating to effectively prevent that the user from skidding between glue film and the skeleton when twisting the screw, influencing and twisting the dynamics.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The encapsulating process of the screwdriver handle is characterized by comprising the following steps:
step one, using nylon as a raw material, heating and melting the nylon, injecting the nylon into a screwdriver handle skeleton mold, maintaining pressure and cooling to obtain a screwdriver handle skeleton, and then opening the mold to take out the screwdriver handle skeleton for cooling and shaping at room temperature;
and secondly, placing the cooled and shaped screwdriver handle framework in a soft rubber injection mold, forming a molding cavity of soft rubber together with a preset mold cavity of the soft rubber injection mold, heating and melting the soft rubber, injecting the molten soft rubber into the molding cavity, and forming a coating layer after pressure maintaining and cooling to obtain a finished product of the screwdriver handle.
2. The process for encapsulating the handle of the screwdriver as claimed in claim 1, wherein the processing temperature of the soft rubber in the second step is at least 20 ℃ lower than that of the nylon in the first step.
3. The process for encapsulating the handle of the screwdriver as claimed in claim 1, wherein the raw material of the skeleton is glass fiber reinforced PA6 or PA66 material.
4. The process for encapsulating the handle of the screwdriver according to claim 2, wherein the glass fiber is added in an amount of 15-30%.
5. The process for encapsulating the handle of the screwdriver according to claim 1, wherein the skeleton of the screwdriver handle obtained in the first step is subjected to heat treatment to remove internal stress before encapsulating.
6. The process for encapsulating the screwdriver handle as claimed in claim 5, wherein the heat treatment is to bake the screwdriver handle skeleton in an oven at 70-90 ℃ for 5-10 min.
7. The process for encapsulating the handle of the screwdriver as claimed in claim 1, wherein the soft rubber is a thermoplastic elastomer or EPDM rubber.
8. The process for encapsulating the handle of the screwdriver according to claim 1, wherein a plurality of groups of groove ridge structures are longitudinally arranged on the contact surface of the handle skeleton and the soft rubber, and the distance between each group of groove ridge structures is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011564266.0A CN112743750A (en) | 2020-12-25 | 2020-12-25 | Encapsulating process for screwdriver handle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011564266.0A CN112743750A (en) | 2020-12-25 | 2020-12-25 | Encapsulating process for screwdriver handle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112743750A true CN112743750A (en) | 2021-05-04 |
Family
ID=75647644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011564266.0A Pending CN112743750A (en) | 2020-12-25 | 2020-12-25 | Encapsulating process for screwdriver handle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112743750A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205465917U (en) * | 2016-03-08 | 2016-08-17 | 上海钜泰工具有限公司 | Soft handle screwdriver |
| CN107225725A (en) * | 2017-06-14 | 2017-10-03 | 苏州超群智能科技有限公司 | The toothbrush injection machine of post forming |
-
2020
- 2020-12-25 CN CN202011564266.0A patent/CN112743750A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205465917U (en) * | 2016-03-08 | 2016-08-17 | 上海钜泰工具有限公司 | Soft handle screwdriver |
| CN107225725A (en) * | 2017-06-14 | 2017-10-03 | 苏州超群智能科技有限公司 | The toothbrush injection machine of post forming |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210504 |