CN109016404A - Injection mold, internal screw thread injection molding forming method and shaped article - Google Patents
Injection mold, internal screw thread injection molding forming method and shaped article Download PDFInfo
- Publication number
- CN109016404A CN109016404A CN201810845548.4A CN201810845548A CN109016404A CN 109016404 A CN109016404 A CN 109016404A CN 201810845548 A CN201810845548 A CN 201810845548A CN 109016404 A CN109016404 A CN 109016404A
- Authority
- CN
- China
- Prior art keywords
- oblique top
- screw thread
- mold
- forming part
- shaped article
- 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.)
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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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
-
- 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
- B29L2001/00—Articles provided with screw threads
Abstract
The disclosure is directed to a kind of injection mold, internal screw thread injection molding forming method and shaped articles.The injection mold, including preceding mould and rear mold, the preceding mould and the rear mold are combined to form die cavity, and the preceding mould includes mold forming portion before at least two groups pitched roof mechanism and at least two, and the pitched roof mechanism includes: guide rod；Guide part can be such that the guide rod slides along the direction that the guide part limits；Oblique top forming part, the oblique top forming part is connected to the guide rod, the outer peripheral surface of the oblique top forming part is arc surface, it is the preceding mold forming portion between the oblique top forming part of the adjacent pitched roof mechanism, the outer peripheral surface in the preceding mold forming portion is smooth surface, and the outer peripheral surface of the oblique top forming part is provided with external screw thread.The technical scheme provided by this disclosed embodiment can obtain following the utility model has the advantages that the injection mold and internal screw thread injection molding forming method of the disclosure can simplify mould structure, and shortening injection cycle improves injection efficiency.
Description
Technical field
This disclosure relates to injection molding art more particularly to injection mold, internal screw thread injection molding forming method and shaped article.
Background technique
In the related technology, it when processing tool internal thread product by injection molding, needs using abjection screw thread
Product could be deviate from screw thread by mechanical structure, so causing injection cycle long, mould structure is complicated.
Summary of the invention
To overcome the problems in correlation technique, the disclosure provides a kind of injection mold, can be without using abjection spiral shell
Product is easily deviate from screw thread by the mechanical structure of line, the disclosure on the other hand provide a kind of internal screw thread injection molding forming method and
Shaped article.
According to the first aspect of the embodiments of the present disclosure, a kind of injection mold is provided comprising preceding mould and rear mold, the preceding mould
It being combined to form die cavity with the rear mold, the preceding mould includes mold forming portion before at least two groups pitched roof mechanism and at least two,
The pitched roof mechanism includes:
Guide rod；
Guide part can be such that the guide rod slides along the direction that the guide part limits；
Oblique top forming part, the oblique top forming part are connected to the guide rod, and the outer peripheral surface of the oblique top forming part is circle
Cambered surface, is the preceding mold forming portion between the oblique top forming part of the adjacent pitched roof mechanism, the preceding mold forming portion it is outer
Circumferential surface is smooth surface, and the outer peripheral surface of the oblique top forming part is provided with external screw thread.
In one possible implementation, the guide part makes sliding side of the guide rod when ejecting shaped article
It is tilted to towards the axle center of the oblique top forming part.
In one possible implementation, the diameter of the outer peripheral surface in the preceding mold forming portion is greater than the externally threaded public affairs
Claim diameter.
In one possible implementation, the outer peripheral surface of the oblique top forming part expands into trapezoidal.
In one possible implementation, the outer peripheral surface of the outer peripheral surface of the oblique top forming part and the preceding mold forming portion
It can make up complete periphery or circular conical surface.
In one possible implementation, axis of the external screw thread of the pitched roof mechanism about the oblique top forming part
Line central symmetry.
According to the second aspect of an embodiment of the present disclosure, a kind of internal screw thread injection molding forming method is provided, comprising: use the present invention
The material that is melted to the mould intracavitary administration of injection mold；And tool internal thread is formed after material cooling and solidifying
Shaped article.
In one possible implementation, internal screw thread injection molding forming method, comprising: utilize the preceding mold forming portion and institute
The inner wall that pitched roof mechanism forms the shaped article is stated,
Wherein, the inner wall formation surface for being extruded in the shaped article using the preceding mold forming portion and rear mold is smooth
Spacer portion；
Internal screw thread is formed using the inner wall for being extruded in the shaped article of the pitched roof mechanism and the rear mold.
In one possible implementation, the internal screw thread is formed using the oblique top forming part of the pitched roof mechanism.
In one possible implementation, made by the guide rod of the pitched roof mechanism along guide part sliding described
Oblique top forming part ejects the shaped article and demoulds the shaped article and the preceding mold forming portion；
Made and keeping the oblique top forming part of at least two groups pitched roof mechanism close to each other the shaped article from
The oblique top forming part demoulding.
According to the third aspect of an embodiment of the present disclosure, a kind of formed product, including circular hole, the internal perisporium of the circular hole are provided
It is formed with internal screw thread, the internal screw thread is broken as at least two parts in the circumferential direction of the circular hole, between having between every two parts
Every portion.
In one possible implementation, the nominal diameter of the internal screw thread is less than the straight of the circular arc of the spacer portion
Diameter.
In one possible implementation, the spacer portion be smooth surface, the spacer portion expand into it is trapezoidal, from institute
The cooperation product that the direction that the trapezoidal upper bottom is directed toward in trapezoidal bottom is the shaped article is stated to screw in along the internal screw thread
The direction of the circular hole.
The technical scheme provided by this disclosed embodiment can obtain it is following the utility model has the advantages that the injection mold of the disclosure and
Internal screw thread injection molding forming method can simplify mould structure, shorten injection cycle, improve injection efficiency.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
Limit the disclosure.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the disclosure
Example, and together with specification for explaining the principles of this disclosure.
Fig. 1 is a kind of injection mold shown according to an exemplary embodiment and the shaped article made of the injection mold
Structural schematic diagram.
Fig. 2 is a kind of structural schematic diagram of shaped article shown according to an exemplary embodiment.
Description of symbols:
Spiral shell in 3 shaped article 31 of mold forming portion before 1 pitched roof mechanism, 11 oblique top forming part, 12 guide part, 13 guide rod 2
32 spacer portion A of line is axial.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all implementations consistent with this disclosure.On the contrary, they be only with it is such as appended
Described in claims, the example for the device and method that some aspects of the disclosure are consistent.
Fig. 1 is a kind of injection mold shown according to an exemplary embodiment and forms production made of the injection mold
Product.The injection mold can be used for making tool internal thread shaped article 3.Axial A refers to the screw thread of the shaped article 3 of injection molding
The axial direction in hole, be described below in sometimes referred to as " axial direction ", circumferentially refer to the circumferential direction of the threaded hole of the shaped article 3 of injection molding, below
In description sometimes referred to as " circumferential direction ".
As shown in Figure 1, injection mold includes preceding mould and rear mold (not shown), preceding mould and rear mold are combined to form die cavity,
By the material melted to mould intracavitary administration, shaped article 3 similar with mold cavity shapes can be formed after material cooling and solidifying.
Preceding mould includes two groups of pitched roof mechanisms 1, and pitched roof mechanism 1 includes oblique top forming part 11, guide part 12 and guide rod 13.Guide rod 13 can
To pass through guide part 12, slide guide rod 13 along the direction that guide part 12 limits.Oblique top forming part 11 is connected to guide rod 13,
The outer peripheral surface of oblique top forming part 11 is arc surface, which is used to form the part in the circumferential direction of threaded hole in injection moulding process
Inner wall.
There are two preceding mold forming portion 2, preceding mold forming portions 2 for setting between two oblique top forming parts 11 of two groups of pitched roof mechanisms 1
Outer peripheral surface and the outer peripheral surface of oblique top forming part 11 can make up complete closely sealed periphery, which uses in injection moulding process
In the complete inner wall for forming threaded hole.Utilize preceding mold forming portion 2 and shape on the inner wall for being extruded in shaped article 3 of rear mold
At the spacer portion 32 that surface is smooth；Shaped article 3 is extruded in using the oblique top forming part 11 and the rear mold of pitched roof mechanism 1
Screw thread is formed on inner wall.
In this embodiment, the outer peripheral surface in preceding mold forming portion 2 and the outer peripheral surface of oblique top forming part 11 can make up complete close
The periphery of conjunction.However the present disclosure is not limited thereto, the outer peripheral surface of the outer peripheral surface in preceding mold forming portion 2 and oblique top forming part 11 can be with
The complete closely sealed circular conical surface of composition, for being molded taper pipe thread.
The outer peripheral surface of oblique top forming part 11 is provided with external screw thread, the outer peripheral surface of the oblique top forming part 11 of two groups of pitched roof mechanisms 1
External screw thread be two parts that coherent threaded line separates in the circumferential.
The outer peripheral surface of the oblique top forming part 11 of two groups of pitched roof mechanisms 1 can have identical arc length in the circumferential, and outer
Screw thread also can have identical arc length, and two-part external screw thread is symmetrical about the axis centre of threaded hole.
The externally threaded crest of the outer peripheral surface of oblique top forming part 11 forms the tooth bottom of internal screw thread 31 in injection molding, oblique top at
The externally threaded tooth bottom of the outer peripheral surface in type portion 11 forms the crest of internal screw thread 31 in injection molding.
The diameter of the outer peripheral surface in preceding mold forming portion 2 is greater than the externally threaded nominal diameter of the outer peripheral surface of oblique top forming part 11,
To which the diameter of the circular arc of the spacer portion 32 of the shaped article 3 formed is greater than the nominal diameter of the internal screw thread 31 of shaped article 3.Tool
Body, the diameter of the outer peripheral surface in preceding mold forming portion 2 is greater than the diameter of the externally threaded crest of the outer peripheral surface of oblique top forming part 11.
Oblique top forming part 11 can be arch, tile or other shapes, need to only guarantee the outer peripheral surface of oblique top forming part 11
For arc surface, concrete shape can be appropriately designed and the factors such as the intensity and the cooling water channel that comprehensively consider pitched roof mechanism 1.
As shown in Figure 1, when shaped article 3 demoulds, in order to be easy oblique top forming part 11 and preceding mold forming portion 2 along axial direction
A is relatively moved, and the two sides in the circumferential direction of oblique top forming part 11 are tilted relative to axial A, makes the outer peripheral surface of oblique top forming part 11
It expands into trapezoidal.Correspondingly, due to the outer peripheral surface in preceding mold forming portion 2 and the outer peripheral surface of oblique top forming part 11 can make up it is complete close
The periphery of conjunction, before mold forming portion 2 outer peripheral surface expansion also to be trapezoidal.
Ejection shaped article 3 demoulds shaped article 3 and preceding mold forming portion 2 to pitched roof mechanism 1 upwards, oblique top forming part 11
Top (stripping direction of shaped article 3) of the trapezoidal bottom of outer peripheral surface expansion at upper bottom, the outer peripheral surface of oblique top forming part 11
Upper end camber line it is longer than the camber line of lower end.In other words, the trapezoidal bottom of the outer peripheral surface expansion in preceding mold forming portion 2 is at upper bottom
Lower section (opposite direction of the stripping direction of shaped article 3), the camber line of the upper end of the outer peripheral surface in preceding mold forming portion 2 is than lower end
Camber line is short.To make oblique top forming part 11 and preceding mold forming portion 2 be easy to relatively move along axial A.
The arc length of the shaped article 3 made using the injection mold, internal screw thread 31 in the circumferential accounts for the ratio of full circumferences
Example is more, and the fastening effect of screw thread is then better.Therefore outside the higher occasion of fastening requirements, the outer peripheral surface of oblique top forming part 11
Screw thread will occupy higher ratio in the circumferential.In other words, preceding mold forming portion 11 occupies less ratio in the circumferential.Preceding mould at
The ratio that type portion 11 occupies in the circumferential at least needs to guarantee the smoothly ejection shaped article 3 of pitched roof mechanism 1, and makes shaped article 3
Demoulding.
During pitched roof mechanism 1 ejects shaped article 3, guide rod 13 is slided along the direction that guide part 12 limits, and two tiltedly
Top forming part 11 moves closer to.Before two oblique top forming parts 11 contact, the external screw thread energy of the outer peripheral surface of oblique top forming part 11
It enough completely disengages by the internal screw thread 31 of the shaped article 3 of its injection molding.That is, when along axial A observation, oblique top forming part
11 externally threaded crest is detached from the crest of internal screw thread 31, and shaped article 3 is enable to deviate from.
As shown in Figure 1, pitched roof mechanism 1 is when ejecting shaped article 3, the glide direction of oblique top forming part 11 (arrow in Fig. 1
Direction) it is tilted towards the axle center of shaped article 3, so that the outer peripheral surface of oblique top forming part 11 is progressively disengaged the inner wall of shaped article 3.
It should be noted that the present embodiment only illustrates the disclosure so that injection mold includes two groups of pitched roof mechanisms 1 as an example, however
The present disclosure is not limited thereto, and injection mold can also include three groups, four groups or more group pitched roof mechanisms 1.More multiple groups pitched roof mechanism 1,
The internal screw thread 31 of the shaped article 3 of injection molding can be made to be broken as more parts in the circumferential.
Illustrate the product made using above-mentioned injection mold below.
Fig. 2 is a kind of shaped article of injection mold production shown according to an exemplary embodiment.As shown in Fig. 2, at
Type product 3 has circular hole (including cylindrical hole and conical bore), and the internal perisporium of circular hole is formed with internal screw thread 31, and internal screw thread 31 is in circular hole
Circumferential direction on be broken as two parts, there are two sections of spacer portions 32 between two parts.Two parts internal screw thread 31 can have identical
Arc length, and the axis centre about threaded hole is symmetrical.The diameter of the circular arc of spacer portion 32 is greater than the internal screw thread 31 of shaped article 3
Nominal diameter, specifically, the diameter of the circular arc of spacer portion 32 is greater than the diameter at the tooth bottom of the internal screw thread 31 of shaped article 3, because
The cooperation product of this shaped article 3 can screw in circular hole along internal screw thread 31.Spacer portion 32 be expand into it is trapezoidal, from this it is trapezoidal under
The direction that the trapezoidal upper bottom is directed toward at bottom is that the cooperation product of the shaped article 3 screws in the direction of threaded hole.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by appended
Claim is pointed out.
It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And it can carry out various modifications and change in the case where without departing from the scope.The protection scope of the disclosure is only by appended right
It is required that limit.
Claims (13)
1. a kind of injection mold, which is characterized in that it includes preceding mould and rear mold, and the preceding mould and the rear mold are combined to be formed
Die cavity, the preceding mould include mold forming portion before at least two groups pitched roof mechanism and at least two, and the pitched roof mechanism includes:
Guide rod；
Guide part can be such that the guide rod slides along the direction that the guide part limits；
Oblique top forming part, the oblique top forming part are connected to the guide rod, and the outer peripheral surface of the oblique top forming part is arc surface,
It is the preceding mold forming portion between the oblique top forming part of the adjacent pitched roof mechanism, the outer peripheral surface in the preceding mold forming portion is
The outer peripheral surface of smooth surface, the oblique top forming part is provided with external screw thread.
2. injection mold according to claim 1, which is characterized in that the guide part forms the guide rod in ejection
Glide direction when product is tilted towards the axle center of the oblique top forming part.
3. injection mold according to claim 1, which is characterized in that the diameter of the outer peripheral surface in the preceding mold forming portion is greater than
The externally threaded nominal diameter.
4. injection mold according to claim 1, which is characterized in that the outer peripheral surface of the oblique top forming part expands into ladder
Shape.
5. injection mold according to claim 1, which is characterized in that the outer peripheral surface of the oblique top forming part and the preceding mould
The outer peripheral surface of forming part can make up complete periphery or circular conical surface.
6. injection mold according to claim 1, which is characterized in that the external screw thread of the pitched roof mechanism is about described
The axis centre of oblique top forming part is symmetrical.
7. a kind of internal screw thread injection molding forming method characterized by comprising use the note of any of claims 1-6
The material that mould is melted to the mould intracavitary administration；And tool internal thread molding is formed after material cooling and solidifying
Product.
8. internal screw thread injection molding forming method according to claim 7 characterized by comprising utilize the preceding mold forming
Portion and the pitched roof mechanism form the inner wall of the shaped article,
Wherein, using the inner wall for being extruded in the shaped article of the preceding mold forming portion and rear mold formed surface it is smooth between
Every portion；
Internal screw thread is formed using the inner wall for being extruded in the shaped article of the pitched roof mechanism and the rear mold.
9. internal screw thread injection molding forming method according to claim 8, which is characterized in that utilize the oblique top of the pitched roof mechanism
Forming part forms the internal screw thread.
10. internal screw thread injection molding forming method according to claim 8, which is characterized in that pass through leading for the pitched roof mechanism
To bar along guide part sliding so that the oblique top forming part is ejected the shaped article and make the shaped article and it is described before
The demoulding of mold forming portion；
Make the shaped article from described and keeping the oblique top forming part of at least two groups pitched roof mechanism close to each other
The demoulding of oblique top forming part.
11. a kind of shaped article, which is characterized in that including circular hole, the internal perisporium of the circular hole is formed with internal screw thread, the interior spiral shell
Line is broken as at least two parts in the circumferential direction of the circular hole, has spacer portion between every two parts.
12. shaped article according to claim 11, which is characterized in that between the nominal diameter of the internal screw thread is less than described in
Every the diameter of the circular arc in portion.
13. shaped article according to claim 11, which is characterized in that the spacer portion is smooth surface, the interval
Portion expands into trapezoidal, and the direction for being directed toward the trapezoidal upper bottom from the trapezoidal bottom is the cooperation product of the shaped article
The direction of the circular hole is screwed in along the internal screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810845548.4A CN109016404A (en) | 2018-07-27 | 2018-07-27 | Injection mold, internal screw thread injection molding forming method and shaped article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810845548.4A CN109016404A (en) | 2018-07-27 | 2018-07-27 | Injection mold, internal screw thread injection molding forming method and shaped article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109016404A true CN109016404A (en) | 2018-12-18 |
Family
ID=64647263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810845548.4A Pending CN109016404A (en) | 2018-07-27 | 2018-07-27 | Injection mold, internal screw thread injection molding forming method and shaped article |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109016404A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204546949U (en) * | 2015-04-10 | 2015-08-12 | 佛山市东亚模具科技有限公司 | The injection mold of a kind of pair of back-off plastic parts |
-
2018
- 2018-07-27 CN CN201810845548.4A patent/CN109016404A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204546949U (en) * | 2015-04-10 | 2015-08-12 | 佛山市东亚模具科技有限公司 | The injection mold of a kind of pair of back-off plastic parts |
Non-Patent Citations (2)
| Title |
|---|
| 吴泊良等: "《塑料成型工艺与模具设计》", 31 December 2011, 国防工业出版社 * |
| 田福祥等: "《型芯内缩式自动脱螺纹注塑模设计》", 《现代塑料加工应用》 * |
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Application publication date: 20181218 |