CN206926183U - A kind of plastic part back-off hole shaping mechanism - Google Patents
A kind of plastic part back-off hole shaping mechanism Download PDFInfo
- Publication number
- CN206926183U CN206926183U CN201720897257.0U CN201720897257U CN206926183U CN 206926183 U CN206926183 U CN 206926183U CN 201720897257 U CN201720897257 U CN 201720897257U CN 206926183 U CN206926183 U CN 206926183U
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- CN
- China
- Prior art keywords
- pin
- plastic part
- hole
- mold cavity
- spring
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of plastic part back-off hole shaping mechanism, including mold cavity, pin, spring, pin seat and plug screw, corresponding cavity is gone out according to the sharp processing of plastic part in the forming face of mold cavity, mold cavity is provided with mounting hole on position corresponding with plastic part, pin is arranged in the mounting hole of mold cavity after the through hole of pin seat, plug screw, which is tightened on pin seat, to be used to hold out against the pin, spring housing is on the periphery of pin, the both ends of spring are against on the step surface of mounting hole and the inner face of pin seat respectively, pin seat is fixedly connected on mold cavity by pressing plate.The utility model is designed reasonably, it is skillfully constructed, compact-sized, the back-off hole demoulding of plastic part is smooth, and size is more accurate, is hardly damaged.
Description
Technical field
It the utility model is related to plastic moulds technology field, more particularly to a kind of plastic part back-off hole shaping mechanism.
Background technology
Plastic part all avoids the appearance of back-off feature, especially back-off hole all the time in injection molding process, such as
Oral area is small, the big cucurbit type hole of internal diameter, and it is difficult shaping to be all the time.But in design early stage of plastic part, very
Need to set back-off hole under more situations, during as needed to install pipeline fixing clip in automobile lamp or automobile interior exterior decorations plastic part,
It is simple and convenient using back-off hole, the parts such as increase fixing screws can be saved.Such product conventional fabrication method, in mould molding
When frequently with stripping structure is forced, the product of the shaping structures greatly reduces the formed precision in back-off hole, the size in back-off hole
With quality it is difficult to ensure that.
Utility model content
The purpose of this utility model is to provide a kind of plastic part back-off hole shaping mechanism, solves prior art back-off hole
The problem of forced stripper mechanism is second-rate after shaping.
In order to solve the above technical problems, the utility model adopts the following technical scheme that：
A kind of plastic part back-off hole shaping mechanism of the utility model, including mold cavity, pin, spring, pin seat
And plug screw, corresponding cavity, mold cavity and modeling are gone out according to the sharp processing of plastic part in the forming face of the mold cavity
Mounting hole is provided with the corresponding position of material product, the pin is arranged on the mould type after the through hole of the pin seat
In the mounting hole of chamber, the plug screw, which is tightened on pin seat, to be used to hold out against the pin, and the spring housing is mounted in the pin
On periphery, the both ends of spring are against on the step surface of the mounting hole and the inner face of the pin seat respectively, and the pin seat leads to
Pressing plate is crossed to be fixedly connected on the mold cavity.
Further, the pressing plate is fixedly connected on the mold cavity by screw.
Further, the pin specifically uses hierarchic structure, the shape at top shaping position and the plastic part
Internal via shape match.
Further, the spring is selected and folds standard component, concrete model SSWF14-60.
Further, the mounting hole of the mold cavity is positioning section close to plastic part side, the positioning section
Length is 10~15mm, and unilateral fit clearance is 0.01~0.03mm；Another section is empty avoiding section, the emptiness avoiding hole and the pin
Unilateral fit clearance be 0.5~1mm.
Compared with prior art, advantageous effects of the present utility model：
A kind of plastic part back-off hole shaping mechanism of the utility model, during production, when matched moulds, injection, moulding plastics system
After part, plastic mould die sinking, the pin in shaping back-off hole can move together in company with plastic part, when moving to certain distance,
Pin no longer moves, and plastic part can depart from the presence of mould opening force with pin；After plastic part and pin depart from, edge
Pin can bounce back under the action of the spring, prepare next matched moulds shaping.Plastic part is in open state when being left with pin, and de-
From when plastic part be the condition of high temperature, its retractility is strong, therefore size is more stable accurate after plastic part rising-heat contracting-cold, departs from
When be less prone to and pull and cracking defect.The utility model is designed reasonably, it is skillfully constructed, compact-sized, the back-off of plastic part
The hole demoulding is smooth, and size is more accurate, is hardly damaged.
Brief description of the drawings
The utility model is described in further detail for explanation below in conjunction with the accompanying drawings.
Fig. 1 is the utility model plastic part back-off hole shaping mechanism schematic diagram；
Description of reference numerals：1st, plastic part；2nd, mold cavity；3rd, pin；4th, spring；5th, pin seat；6th, plug screw；7th, press
Plate；8th, screw.
Embodiment
As shown in figure 1, a kind of plastic part back-off hole shaping mechanism, including mold cavity 2, pin 3, spring 4, pin
Seat 5 and plug screw 6, corresponding cavity, mould type are gone out according to the sharp processing of plastic part 1 in the forming face of the mold cavity 2
Chamber 2 is arranged on being provided with mounting hole, the pin 3 on 1 corresponding position of plastic part after the through hole of the pin seat 5
In the mounting hole of the mold cavity 2, the plug screw 6, which is tightened on pin seat 5, to be used to hold out against the pin 3,4 sets of the spring
On the periphery of the pin 3, the both ends of spring 4 be against respectively the mounting hole step surface and the pin seat 5 it is interior
On face, the pin seat 5 is fixedly connected on the mold cavity 2 by pressing plate 7.
The pressing plate 7 is fixedly connected on the mold cavity 2 by screw 8, and No. 45 steel can be selected in the pressing plate 7, add
The processing of man-hour edge chamfering, to facilitate installation, while prevent from scratching operative employee.
The pin 3 specifically uses hierarchic structure, the shape and the internal via shape of the plastic part 1 at top shaping position
Match, the material selection SKD61 of pin 3.
The spring is selected and folds standard component, concrete model SSWF14-60.
The mounting hole of the mold cavity 2 is positioning section close to the side of plastic part 1, the length of the positioning section for 10~
15mm, unilateral fit clearance are 0.01~0.03mm；Another section is empty avoiding section, and the emptiness avoiding hole is matched somebody with somebody with the unilateral of pin 3
Conjunction gap is 0.5~1mm.
Action process of the present utility model is as follows：
First, the utility model is installed on plastic mould, after matched moulds, injection, moulding plastics product 1, the modern designs of plastics
Tool die sinking, the pin 3 in shaping back-off hole can move together in company with plastic part 1, when moving to certain distance, pin seat 5 with
The contact of mold cavity 2 forms spacing, and pin 3 no longer moves, and plastic part 1 can depart from the presence of mould opening force with pin 3；When
After plastic part 1 departs from pin 3, pin 3 can bounce back in the presence of spring 4, prepare next matched moulds shaping.The die sinking side
Formula can ensure that plastic part 1 and pin 3 are in open state when leaving, i.e. the cylinder external diameter of plastic part 1 has disengaged from being molded
Hole, internal diameter are enclosed on the top of the pin 3, are departed from when departing from again by the retractility of plastic part from pin 3, and depart from
When plastic part 1 be the condition of high temperature, its retractility is strong, therefore size is more stable accurate after the rising-heat contracting-cold of plastic part 1, departs from
When be less prone to and pull and cracking defect.
Embodiment described above is only that preferred embodiment of the present utility model is described, not to of the present utility model
Scope is defined, and on the premise of the utility model design spirit is not departed from, those of ordinary skill in the art are new to this practicality
The various modifications and improvement that the technical scheme of type is made, the protection domain of the utility model claims book determination all should be fallen into
It is interior.
Claims (5)
- A kind of 1. plastic part back-off hole shaping mechanism, it is characterised in that：Including mold cavity (2), pin (3), spring (4), pin seat (5) and plug screw (6), phase is gone out according to the sharp processing of plastic part (1) in the forming face of the mold cavity (2) The cavity answered, mounting hole is provided with mold cavity (2) position corresponding with plastic part (1), the pin (3) is through described After the through hole of pin seat (5) in the mounting hole of the mold cavity (2), the plug screw (6) is tightened on pin seat (5) For holding out against the pin (3), the spring (4) is sleeved on the periphery of the pin (3), and the both ends of spring (4) are supported respectively On the step surface of the mounting hole and the inner face of the pin seat (5), the pin seat (5) is fixedly connected by pressing plate (7) On the mold cavity (2).
- 2. plastic part back-off hole shaping mechanism according to claim 1, it is characterised in that：The pressing plate (7) passes through Screw (8) is fixedly connected on the mold cavity (2).
- 3. plastic part back-off hole shaping mechanism according to claim 1, it is characterised in that：The pin (3) is specific Using hierarchic structure, the shape and the internal via shape of the plastic part (1) at top shaping position match.
- 4. plastic part back-off hole shaping mechanism according to claim 1, it is characterised in that：The spring is selected and folded Standard component, concrete model SSWF14-60.
- 5. plastic part back-off hole shaping mechanism according to claim 1, it is characterised in that：The mold cavity (2) Mounting hole close to plastic part (1) side be positioning section, the length of the positioning section is 10~15mm, and unilateral fit clearance is 0.01~0.03mm, another section is empty avoiding section, and the unilateral fit clearance of the emptiness avoiding hole and the pin (3) is 0.5~1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720897257.0U CN206926183U (en) | 2017-07-20 | 2017-07-20 | A kind of plastic part back-off hole shaping mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720897257.0U CN206926183U (en) | 2017-07-20 | 2017-07-20 | A kind of plastic part back-off hole shaping mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206926183U true CN206926183U (en) | 2018-01-26 |
Family
ID=61355438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720897257.0U Expired - Fee Related CN206926183U (en) | 2017-07-20 | 2017-07-20 | A kind of plastic part back-off hole shaping mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206926183U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113103625A (en) * | 2021-03-03 | 2021-07-13 | 东风柳州汽车有限公司 | Mold mechanism for molding SMC parts |
| CN113210570A (en) * | 2021-04-09 | 2021-08-06 | 广东鸿特精密技术（台山）有限公司 | Die for improving burrs of blank positioning holes |
-
2017
- 2017-07-20 CN CN201720897257.0U patent/CN206926183U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113103625A (en) * | 2021-03-03 | 2021-07-13 | 东风柳州汽车有限公司 | Mold mechanism for molding SMC parts |
| CN113210570A (en) * | 2021-04-09 | 2021-08-06 | 广东鸿特精密技术（台山）有限公司 | Die for improving burrs of blank positioning holes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180126 Termination date: 20180720 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |