CN108724638B - Pouring gate insert and die comprising same - Google Patents
Pouring gate insert and die comprising same Download PDFInfo
- Publication number
- CN108724638B CN108724638B CN201810669796.8A CN201810669796A CN108724638B CN 108724638 B CN108724638 B CN 108724638B CN 201810669796 A CN201810669796 A CN 201810669796A CN 108724638 B CN108724638 B CN 108724638B
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- China
- Prior art keywords
- insert
- pouring
- mold
- material outlet
- arc
- Prior art date
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Links
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000001746 injection moulding Methods 0.000 claims abstract description 19
- 238000004513 sizing Methods 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 239000003292 glue Substances 0.000 claims description 21
- 238000005266 casting Methods 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 6
- 230000013011 mating Effects 0.000 claims 2
- 230000007423 decrease Effects 0.000 claims 1
- 241000234295 Musa Species 0.000 description 2
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a pouring gate insert and a die comprising the same. The pouring gate insert is arranged on an injection mold and comprises an insert main body, a pouring channel is formed in the insert main body, the pouring channel comprises an arc-shaped section, a rubber material inlet is formed at the second end of the arc-shaped section, a rubber material outlet is formed at the first end of the arc-shaped section, the rubber material outlet is positioned on the upper side face of the insert main body, and the rubber material outlet faces upwards. According to the pouring gate insert provided by the invention, the arc-shaped pouring channel is arranged, and the sizing material outlet is positioned on the upper side surface of the insert main body, so that the pouring gate can be positioned on the non-appearance surface of the injection molding piece instead of the edge or the appearance surface, and the appearance of the injection molding piece is not influenced.
Description
Technical Field
The invention relates to the technical field related to injection molds, in particular to a pouring gate insert and a mold comprising the same.
Background
The traditional glue feeding mode of the injection mold mainly adopts side glue feeding, submarine glue feeding and the like, and after the product is demolding, the pouring gate is often required to be removed through secondary processing, so that not only is the manually added to process the pouring gate, but also the appearance of the product is affected, and the trace of the pouring gate is often left at the position of the pouring gate. In addition, due to the limitation of the glue feeding mode, the pouring gate can only be arranged at the edge position of the product.
Disclosure of Invention
Accordingly, it is an object of the present invention to provide a sprue insert and a mold including the same that can prevent a sprue break from affecting the appearance of an injection molding.
In a first aspect, a pouring gate insert is provided, and the pouring gate insert is arranged on an injection mold and comprises an insert main body, a pouring channel is formed in the insert main body, the pouring channel comprises an arc-shaped section, a second end of the arc-shaped section forms a rubber material inlet, a first end forms a rubber material outlet, the rubber material outlet is positioned on the upper side surface of the insert main body, and the rubber material outlet faces upwards.
Preferably, the arcuate segment tapers in cross-sectional dimension from the second end to the first end.
Preferably, the inclination of the side edge h of the arc-shaped section is theta, and theta is more than or equal to 4 degrees.
Preferably, the glue outlet is configured as a flat outlet.
Preferably, the size outlet has a length dimension a, a ranging from 3 to 8cm, and/or,
the width dimension of the sizing material outlet is b, and the value range of b is 0.5-1.8cm.
Preferably, a convex structure is formed on the upper side of the insert body, and the glue outlet is formed on the convex structure.
Preferably, the insert body has at least one ejector pin hole formed therein, the at least one ejector pin hole being formed at a position near the compound outlet.
Preferably, a groove is formed at the junction of the upper side surface and the side surface intersecting with the upper side surface, and the second end of the arc-shaped section is communicated with the groove.
Preferably, the insert body is further provided with a fixing structure, and the fixing structure is used for being connected with the mold.
Preferably, the upper side of the insert body is configured as a stepped surface comprising a first face and a second face, the second face being higher than the first face,
the compound outlet is formed on the first face.
Preferably, the insert body includes a first portion and a second portion that are disposed opposite to each other, an assembling surface is formed on the first portion and the second portion, a pouring groove is formed on the assembling surface, and after the first portion and the second portion are assembled, the pouring groove is abutted to form the pouring channel.
Preferably, the first portion and the second portion are connected to the mold, respectively, or,
the first part and the second part are connected and then connected with the die.
In a second aspect, a mold is provided comprising a movable mold insert provided with the above-described sprue insert.
Preferably, the movable mold insert is provided with a containing part, and the containing part is communicated with the pouring channel, so that the rubber material in the containing part and the rubber material in the pouring channel form an integrated structure after being molded.
Preferably, the mold further comprises a second ejector rod, and the second ejector rod can push the sizing material molded in the accommodating part and drive the sizing material in the pouring channel to be separated from the injection molding part in the mold.
According to the pouring gate insert provided by the invention, the arc-shaped pouring channel is arranged, and the sizing material outlet is positioned on the upper side surface of the insert main body, so that the pouring gate can be positioned on the non-appearance surface of the injection molding piece instead of the edge or the appearance surface, and the appearance of the injection molding piece is not influenced.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 shows a schematic structural view of a sprue insert;
fig. 2 and 3 show a schematic structural view of the first part;
FIG. 4 shows a schematic top view of a pouring channel;
FIG. 5 shows a schematic structural view of the sprue insert mounted to the movable mold insert of the mold;
fig. 6 shows a schematic cross-sectional view of fig. 5.
Detailed Description
The present invention is described below based on examples, but the present invention is not limited to only these examples. It will be appreciated by those of ordinary skill in the art that the drawings provided herein are for illustrative purposes and that the drawings are not necessarily drawn to scale.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The pouring gate insert provided by the invention is used for an injection mold, and is particularly suitable for the injection mold of plastic parts.
As shown in fig. 1, the pouring gate insert 1 provided by the invention comprises an insert main body, wherein a pouring channel is formed in the insert main body, preferably, the insert main body comprises a first part 11 and a second part 12 which are arranged in a split mode, the first part 11 and the second part 12 are symmetrical in structure, the first part 11 and the second part 12 are mutually abutted to form the pouring gate insert 1, and the pouring channel is formed between the first part 11 and the second part 12.
The specific structure of the first part 11 will be described in detail below by taking it as an example. As shown in fig. 2 and 3, the first portion 11 includes a main body 111, and the main body 111 is configured in a block structure, and the block structure includes a fitting surface 112, and the fitting surface 112 is in close contact with an opposite fitting surface on the second portion 12. The mounting surface 112 is formed with a casting groove 113, the casting groove 113 is disposed at an upper portion of the mounting surface 112, and the casting groove 113 is configured in a curved shape, for example, a horn shape or a banana shape. After the first part 11 and the second part 12 are spliced, pouring grooves in the first part 11 and the second part 12 are spliced to form a pouring channel which is sealed in the circumferential direction, and the pouring channel is in a ox horn shape or a banana shape. Preferably, the dimension of the pouring channel in the up-down direction shown in fig. 3 is smaller than the dimension in the direction perpendicular to the up-down direction, so that the pouring channel forms a flat channel, further, the dimension of the section of the pouring channel in the direction from the inlet end to the outlet end is gradually reduced, so that the pouring channel can be conveniently demolded from the first end to the second end, as shown in fig. 4, the side h of the pouring channel has a certain inclination θ, preferably θ is greater than or equal to 4 °. Further, the wall surface of the pouring groove 113 is a smooth curved surface, so as to facilitate the taking out of the formed sizing material from the pouring channel.
The first end of the pouring spout 113 in the extending direction is located on an upper side 115 of the first portion 11, the upper side 115 being perpendicular to the fitting surface 112 and located on an upper side of the fitting surface 112. The upper side 115 is formed with a protruding structure 114, the protruding structure 114 is preferably a mesa structure with an upper end surface smaller than a lower end surface, the side wall is a smooth curved surface, and the height of the protruding structure 114 is preferably 0.5-1mm. The protruding structure 114 is provided with a notch 116 communicated with the pouring slot 113, the notch 116 forms an outlet of the pouring slot 113, namely, the notches on the two parts are butted to form a glue outlet of the pouring channel, preferably, the size of the notch 116 in the left and right directions is smaller than the size of the notch in the direction perpendicular to the assembly surface 112, so that the notch 116 forms a flat structure, as shown in fig. 4, the length size of the glue outlet is a, the value range of a is 3-8cm, the value range of b is 0.5-1.8cm, and the size of the notch 116 in the stress direction (width direction) is reduced on the premise that the whole area of the notch is ensured to be enough to be the glue, so that the notch is easier to be disconnected with an injection molding piece during demolding. The protrusion structure 114 is arranged, so that the pouring opening is formed into a concave structure after the injection molding part is molded, and after demolding, the pouring opening is formed into a concave shape on the injection molding part, thereby avoiding the phenomenon that the break point of the pouring opening protrudes and is easy to scrape hands or influence the appearance. The second end of the casting trough 113 communicates with the left side 117 of the body 111, the second end of the casting trough 113 constituting the inlet end of the casting trough 113. Preferably, a groove 118 is formed at a position where the upper side 115 and the left side 117 of the body 111 meet, the groove 118 communicates with the second end of the casting groove 113, the casting groove 113 is filled with the glue material through the groove 118, and a width of the groove 118 in a direction perpendicular to the fitting surface 112 is larger than a width of the casting groove 113 in the direction. The provision of the recess 118 allows the pouring spout 113 to communicate with both the upper side 115 and the left side 117, thereby facilitating demolding. Preferably, the lower side wall surface of the groove 118 is higher than the upper side wall surface of the curved portion of the pouring groove 113, and forms a height difference H, and the value of the height difference H ranges from 2 mm to 6mm, so that the glue stock formed in the pouring groove 113 can be prevented from breaking during demolding.
Preferably, the upper side 115 is configured as a stepped surface including a first surface 1151 and a second surface 1152, the first surface 1151 has a lower height than the second surface 1152 in the up-down direction, the protrusion 114 is formed on the first surface 1151, and the groove 118 is formed on the second surface 1152. The first surface 1151 forms a part of a molding surface of the mold, the injection molding part is formed on the upper side of the first surface 1151, and the stepped surface is arranged to make a height difference between the first surface 1151 and the second surface 1152, so that a connection surface between the second surface 1152 and the first surface 1151 can limit the flow of the glue stock, that is, a part of the upper side 115 forms an injection molding surface in an injection molding process.
Preferably, the main body 111 is provided with a jack hole 110 penetrating in an up-down direction, the jack hole 110 is provided for the first jack to pass through so that the first jack can jack the injection molding, preferably, the jack hole 110 is formed on the first surface 1151, and the jack hole 110 is disposed at a position close to the protrusion structure 114. Therefore, the injection molding piece is more uniformly stressed during demolding, and the joint of the injection molding piece and the glue injection port is prevented from being damaged.
Preferably, the main body 111 is further provided with a fixing structure 119 for connecting with an injection mold, preferably, the fixing structure 119 is configured as a threaded hole formed on the main body 111, and the main body 111 is fixed on the injection mold by a screw, preferably, in this embodiment, the first portion 11 and the second portion 12 are connected, and the first portion 11 and the second portion 12 are simultaneously connected to the mold to complete the splicing of the two portions. Alternatively, in other preferred embodiments, the first and second portions 11, 12 are provided with interconnecting structures so that the first and second portions 11, 12 may be connected together and then mounted to a mold.
The invention also provides a die, as shown in fig. 5 and 6, the die comprises a movable die insert 2, the pouring gate insert 1 is arranged on the movable die insert 2, one or two pouring gate inserts 1 can be arranged on the movable die insert 2, and two pouring gate inserts 1 are arranged on the movable die insert 2 shown in the drawing. In this embodiment, the sprue insert 1 is inserted into the movable mold insert 2 such that the first face 1151 is positioned in the same plane as the injection molding face 21 on the movable mold insert 2. A receiving portion 22 is formed on the movable mold insert 2, preferably, the receiving portion 22 is configured as a hole formed to extend along the installation direction of the sprue insert 1, and a first end of the receiving portion 22 can be communicated with an inlet on the sprue insert 1, so that glue can flow into the through hole and the sprue insert 1 at the same time, and the glue in the receiving portion 22 and the glue in the pouring channel in the sprue insert 1 are formed into an integral structure after molding. Preferably, the length of the receiving portion 22 in the axial direction is greater than the sum of the distance L between the receiving portion 22 and the pouring slot 113 and the arc length of the pouring slot 113, so that the glue material molded in the receiving portion 22 can drive the glue material in the pouring gate insert 1 to be ejected. Preferably, the distance L between the receptacle 22 and the pouring spout 113 is greater than the diameter D of the receptacle 22, optimally l=1.5d. The movable mold insert 2 is formed with a through hole along the axial direction of the accommodating portion 22, and the second ejector pin 3 can be inserted into the accommodating portion 22 through the through hole, thereby ejecting the molded rubber. Preferably, when two pouring gate inserts 1 are provided, two accommodating portions 22 may be provided, and two accommodating portions 22 respectively correspond to one pouring gate insert 1, and when two accommodating portions 22 are provided, a main runner of pouring rubber material is located between two accommodating portions 22, so that the rubber material at the accommodating portions 22 is prevented from being too thick and difficult to be cooled and formed.
According to the pouring gate insert provided by the invention, the ox horn-shaped pouring channel is arranged, so that the pouring gate can be positioned on the non-appearance surface of the injection molding part instead of the edge or the appearance surface, and the appearance of the injection molding part is not influenced. And can realize automatic drawing of patterns through setting up flat play glue mouth, and because the pouring gate department section is less, need not handle, saved the operation flow.
It is easy to understand by those skilled in the art that the above preferred embodiments can be freely combined and overlapped without conflict.
It will be understood that the above-described embodiments are merely illustrative and not restrictive, and that all obvious or equivalent modifications and substitutions to the details given above may be made by those skilled in the art without departing from the underlying principles of the invention, are intended to be included within the scope of the appended claims.
Claims (8)
1. The pouring gate insert is arranged on an injection mold and is characterized by comprising an insert main body, wherein a pouring channel is formed in the insert main body, the pouring channel comprises an arc-shaped section, a second end of the arc-shaped section forms a sizing material inlet, a first end forms a sizing material outlet, the sizing material outlet is positioned on the upper side surface of the insert main body, and the sizing material outlet faces upwards;
the cross-sectional dimension of the arc-shaped section gradually decreases from the second end to the first end; the inclination of the side edge h of the arc-shaped section is theta, and theta is more than or equal to 4 DEG
The sizing material outlet is constructed as a flat outlet, the length dimension of the sizing material outlet is a, the value range of a is 3-8cm, the width dimension of the sizing material outlet is b, and the value range of b is 0.5-1.8cm;
the upper side surface of the insert main body is provided with a protruding structure, the protruding structure is a table-shaped structure with the upper end surface smaller than the lower end surface, the side wall is a smooth curved surface, and the protruding height of the protruding structure is 0.5-1mm; the rubber material outlet is formed on the convex structure, so that a concave structure is formed at the rubber material outlet after the injection molding part is molded;
the connection part of the upper side surface and the side surface intersected with the upper side surface forms a groove, and the second end of the arc-shaped section is communicated with the groove; the width of the groove in the direction perpendicular to the assembly surface is larger than the width of the pouring channel in the direction;
the upper side of the insert body is configured as a stepped surface comprising a first face and a second face, the second face being higher than the first face, the compound outlet being formed on the first face; the groove is formed on the second face.
2. The sprue bushing of claim 1 wherein said insert body has at least one ram bore formed therein, said at least one ram bore being formed adjacent said compound outlet.
3. The sprue bushing of claim 1 wherein said insert body further comprises a securing structure for connection to said mold.
4. The sprue insert of claim 1 wherein the insert body comprises oppositely disposed first and second portions having mating surfaces formed thereon, a casting groove formed in the mating surfaces, the casting groove abutting to form the casting channel upon assembly of the first and second portions.
5. The pouring spout insert of claim 4 wherein the first portion and the second portion are respectively connected to the mold or,
the first part and the second part are connected and then connected with the die.
6. A mold comprising a movable mold insert, wherein the movable mold insert is provided with the sprue insert of any one of claims 1-5.
7. The mold according to claim 6, wherein the movable mold insert is provided with a receiving portion, and the receiving portion is in communication with the pouring channel, so that the glue in the receiving portion and the glue in the pouring channel are formed into an integral structure.
8. The mold of claim 7 further comprising a second ejector rod capable of pushing the molded compound in the receptacle and causing the compound in the pouring channel to separate from the injection molded part in the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810669796.8A CN108724638B (en) | 2018-06-26 | 2018-06-26 | Pouring gate insert and die comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810669796.8A CN108724638B (en) | 2018-06-26 | 2018-06-26 | Pouring gate insert and die comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108724638A CN108724638A (en) | 2018-11-02 |
| CN108724638B true CN108724638B (en) | 2023-09-08 |
Family
ID=63930733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810669796.8A Active CN108724638B (en) | 2018-06-26 | 2018-06-26 | Pouring gate insert and die comprising same |
Country Status (1)
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|---|---|
| CN (1) | CN108724638B (en) |
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