CN114643681A - Mould suitable for metal insert injection molding - Google Patents
Mould suitable for metal insert injection molding Download PDFInfo
- Publication number
- CN114643681A CN114643681A CN202210560635.1A CN202210560635A CN114643681A CN 114643681 A CN114643681 A CN 114643681A CN 202210560635 A CN202210560635 A CN 202210560635A CN 114643681 A CN114643681 A CN 114643681A
- Authority
- CN
- China
- Prior art keywords
- runner
- guide rod
- metal insert
- balance arm
- mold
- 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.)
- Granted
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 76
- 239000002184 metal Substances 0.000 title claims abstract description 76
- 238000001746 injection moulding Methods 0.000 title claims description 43
- 229920003023 plastic Polymers 0.000 claims abstract description 4
- 239000004033 plastic Substances 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 abstract description 8
- 239000007924 injection Substances 0.000 abstract description 8
- 239000012778 molding material Substances 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000007373 indentation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- 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
- B29C45/2602—Mould construction elements
-
- 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
-
- 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
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
-
- 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
- B29C45/2725—Manifolds
Abstract
The utility model provides a mould suitable for metal insert moulds plastics, includes runner and pressure balance mechanism, seted up first runner and second runner in the runner, the die cavity intercommunication of first runner and product, pressure balance mechanism includes balance arm, first guide arm and second guide arm, the balance arm can set up through the pivot swingably in on the mould, so that the both ends of balance arm are formed with two free ends, the one end of first guide arm with a free end of balance arm links to each other, and the other end is used for right the metal insert of die cavity exerts pressure, the one end of second guide arm with another free end of balance arm links to each other, the other end with the second runner of runner links to each other. The mould can automatically adjust the injection pressure in the flow channel, prevent the influence on the appearance of a product due to the overlarge injection pressure and improve the yield.
Description
Technical Field
The invention relates to the technical field of injection molding, in particular to a mold suitable for injection molding of a metal insert.
Background
The metal insert injection molding is a method for fixing a metal insert in a proper position in a mold in advance, then injecting plastic for molding, and after the mold is opened, the insert is tightly wrapped and embedded in a product by the cooled and solidified plastic to obtain the product with the inserts such as a threaded ring, an electrode and the like.
In the prior art, in order to enable injection molding materials to flow into a cavity of a product, the injection molding pressure in a runner is generally higher, and in the injection molding process, the higher runner pressure can press a metal insert, so that the appearance of the product with the metal insert is seriously affected, the metal insert is stamped, and the yield is reduced.
Disclosure of Invention
The invention provides a mold suitable for injection molding of a metal insert, which can automatically adjust injection molding pressure in a runner, prevent influence on product appearance caused by overlarge injection molding pressure and improve yield.
The invention provides a mold suitable for injection molding of a metal insert, which comprises a runner and a pressure balance mechanism, wherein a first sprue and a second sprue are arranged in the runner, the first sprue is communicated with a cavity of a product, the pressure balance mechanism comprises a balance arm, a first guide rod and a second guide rod, the middle part of the balance arm is arranged on the mold in a swinging mode through a rotating shaft, so that two free ends are formed at two ends of the balance arm, one end of the first guide rod is connected with one free end of the balance arm, the other end of the first guide rod is used for applying pressure to the metal insert in the cavity, one end of the second guide rod is connected with the other free end of the balance arm, and the other end of the second guide rod is connected with the second sprue of the runner.
Furthermore, the mold suitable for metal insert injection molding comprises an upper half mold, a lower half mold and a side pressing block, wherein the cavity is formed among the upper half mold, the lower half mold and the side pressing block, the runner is formed on the lower half mold, and the pressure balance mechanism is arranged in the upper half mold.
Further, the pressure balance mechanism further comprises a box body, the balance arm is arranged in the box body, an accommodating part for accommodating the box body, a first guide groove and a second guide groove for accommodating the first guide rod and the second guide rod respectively are formed in the upper half die, the box body is arranged in the accommodating part, and the first guide rod and the second guide rod respectively extend into the first guide groove and the second guide groove.
Furthermore, an upper limit surface is formed on the upper side surface of each free end of the balance arm, an upper stop surface is formed on the box body at a position corresponding to the upper limit surface, and the upper stop surface limits the highest position of the balance arm during swinging.
Furthermore, the cross-sectional areas of the ends, close to the free end of the balance arm, of the first guide rod and the second guide rod are larger than the cross-sectional areas of the ends, far away from the free end of the balance arm, of the first guide rod and the second guide rod, so that lower limiting surfaces departing from one side, where the free end of the balance arm is located, are formed on the first guide rod and the second guide rod, lower stopping surfaces are formed on the first guide groove and the second guide groove at positions corresponding to the lower limiting surfaces, and the lower stopping surfaces limit the lowest positions of the first guide rod and the second guide rod during downward movement.
Further, a gasket is arranged between the lower limiting surface and the lower stop surface.
Further, the first guide groove and the second guide groove are arranged along the vertical direction.
Furthermore, the free end of the balance arm is arc-shaped when viewed from the side, the end surfaces of the first guide rod and the second guide rod, which face one end of the balance arm, are planes, and the first guide rod and the second guide rod are abutted against the free end of the balance arm.
Further, the distance between the contact position of the balance arm and the first guide rod and the rotating shaft is equal to the distance between the contact position of the balance arm and the second guide rod and the rotating shaft.
Furthermore, the runner comprises a main runner, a first branch runner and a second branch runner, the first branch runner and the second branch runner are both communicated with the main runner, the first gate is formed in the first branch runner, and the second gate is formed in the second branch runner.
In summary, in the present invention, the first gate and the second gate are formed on the runner, that is, a new gate is formed in addition to the gate connected to the cavity, and the pressure balance mechanism is additionally provided. When the injection molding of the metal insert product is carried out, a metal insert, such as an aluminum insert, can be placed in a cavity of the product, and then the first guide rod is pressed on the metal insert; in the injection molding process, because the pressures at all positions in the runner are basically equal, the second sprue can transmit a pressure to the balance arm through the second guide rod so as to drive the balance arm to rotate, and the pressure of the second sprue is transmitted to the metal insert after passing through the second guide rod, the balance arm and the first guide rod once, namely the first guide rod can apply an acting force to the metal insert from the upper part of the metal insert; and the molding material flowing into the cavity from the first gate applies a force to the metal insert from below the metal insert. That is, through the setting of pressure balance mechanism, need not to add under the circumstances of other drive power, metal insert can receive the pressure of moulding material in the runner simultaneously from upper and lower both sides for the pressure balance of both sides about metal insert can balance the tolerance fluctuation of metal insert in the thickness direction, and metal insert can not produce the indentation because of the pressure in the runner is too big again. That is, this mould can carry out automatically regulated to the injection pressure in the runner, prevents to influence the product outward appearance because of injection pressure is too big, improves the yield.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram illustrating a balance principle of a mold suitable for metal insert injection molding according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a pressure balancing mechanism and a lower mold half in a mold suitable for metal insert injection molding according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a mold suitable for metal insert injection molding.
Fig. 4 is a schematic structural view of the pressure balancing mechanism and the flow passage in fig. 2.
Fig. 5 is a schematic view showing the positional relationship among the balance arm, the first guide bar and the second guide bar in fig. 4.
Fig. 6 is an enlarged schematic view of a portion a in fig. 3.
Marking the drawing files: 10. the structure of the metal insert comprises a runner, 11, a first sprue, 12, a second sprue, 13, a main runner, 14, a first runner sub-runner, 15, a second runner sub-runner, 20, a pressure balance mechanism, 21, a balance arm, 211, a limiting surface, 22, a first guide rod, 23, a second guide rod, 24, a box body, 241, an upper stop surface, 25, a rotating shaft, 26, a lower limiting surface, 30, an upper half die, 31, a lower stop surface, 40, a lower half die, 50, a side pressing block and 60.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.
The invention provides a mold suitable for injection molding of a metal insert, which can automatically adjust injection molding pressure in a runner, prevent influence on product appearance caused by overlarge injection molding pressure and improve yield.
Fig. 1 is a schematic view of a balance principle of a mold suitable for metal insert injection molding according to an embodiment of the present invention, fig. 2 is a schematic view of a pressure balance mechanism and a lower mold half of the mold suitable for metal insert injection molding according to an embodiment of the present invention, fig. 3 is a schematic view of a cross-sectional structure of the mold suitable for metal insert injection molding, fig. 4 is a schematic view of a structure of the pressure balance mechanism and a runner in fig. 2, fig. 5 is a schematic view of a positional relationship among a balance arm, a first guide rod, and a second guide rod in fig. 4, and fig. 6 is an enlarged schematic view of a position a in fig. 3. As shown in fig. 1 to 6, the mold suitable for metal insert injection molding provided by the present invention includes a runner 10 and a pressure balance mechanism 20, the pressure balance mechanism 20 includes a balance arm 21, a first guide rod 22 and a second guide rod 23, the runner 10 is provided with a first gate 11 and a second gate 12, the first gate 11 is communicated with a product cavity, the middle part of the balance arm 21 is swingably disposed on the mold through a rotating shaft 25, so that two free ends are formed at two ends of the balance arm 21, one end of the first guide rod 22 is connected to one free end of the balance arm 21, the other end is used for applying pressure to a metal insert 60 in the cavity, one end of the second guide rod 23 is connected to the other free end of the balance arm 21, and the other end is connected to the second gate 12 of the runner 10.
In the present embodiment, the first gate 11 and the second gate 12 are opened on the runner 10, that is, compared with the prior art, a new gate is opened in addition to the gate connected to the cavity, and the pressure balance mechanism 20 is additionally provided. When the injection molding of the metal insert 60 product is performed, the metal insert 60, such as an aluminum insert, may be placed in a cavity of the product, and then the first guide rod 22 is pressed on the metal insert 60; during the injection molding process, since the pressures at various positions in the runner 10 are substantially equal, the second gate 12 can transmit a pressure to the balance arm 21 through the second guide rod 23 to drive the balance arm 21 to rotate, and the pressure of the second gate 12 is transmitted to the metal insert 60 after passing through the second guide rod 23, the balance arm 21 and the first guide rod 22 in sequence. That is, the first guide bar 22 applies a force to the metal insert 60 from above the metal insert 60, and the injection molding material flowing into the cavity from the first gate 11 applies a force to the metal insert 60 from below the metal insert 60. Through the arrangement of the pressure balance mechanism 20, under the condition that other driving forces are not required to be added, the metal insert 60 can be simultaneously subjected to the pressure of the injection molding material in the runner 10 from the upper side and the lower side, so that the pressure of the upper side and the lower side of the metal insert 60 is balanced, the tolerance fluctuation of the metal insert 60 in the thickness direction can be balanced, and the metal insert 60 can not generate indentation due to overlarge pressure in the runner 10. That is, the mold can automatically adjust the injection pressure in the runner 10, prevent the influence on the appearance of the product due to the overlarge injection pressure, and improve the yield.
Further, with continued reference to fig. 2 to 5, the mold includes an upper mold half 30, a lower mold half 40 and two side pressing blocks 50, and a cavity is formed between the upper mold half 30, the lower mold half 40 and the two side pressing blocks 50. The runner 10 is formed on the lower mold half 40, and the pressure equalizing mechanism 20 is disposed in the upper mold half 30. For the sake of understanding, in fig. 2, two cavities are provided in the same mold, wherein one cavity is provided with a metal insert 60, a pressure balancing mechanism 20, and the like, and the other cavity is provided with a position only showing the runner 10 communicating with the cavity.
Referring to fig. 2 to 5, the pressure balance mechanism 20 further includes a box body 24, the balance arm 21 is disposed in the box body 24, and a receiving portion (not shown) for receiving the box body 24 and a first guide groove (not shown) and a second guide groove (not shown) for receiving the first guide rod 22 and the second guide rod 23 respectively are formed in the upper half mold 30, and both the first guide groove and the second guide groove are disposed along a vertical direction. The box body 24 is disposed in the accommodating portion, and the first guide rod 22 and the second guide rod 23 respectively extend into the first guide groove and the second guide groove. The upper portion of the metal insert 60 extends into the first guide groove to allow the first guide bar 22 to be firmly contacted with the metal insert 60.
As shown in fig. 2 and 4, the runner 10 includes a main runner 13, a first branch runner 14 and a second branch runner 15, the first branch runner 14 and the second branch runner 15 are both communicated with the main runner 13, a first gate 11 is formed in the first branch runner 14, and a second gate 12 is formed in the second branch runner 15.
Further, in the present embodiment, the distance between the contact point of the balance arm 21 and the first guide rod 22 and the rotating shaft 25 is equal to the distance between the contact point of the balance arm 21 and the second guide rod 23 and the rotating shaft 25, that is, the moment arms of the pressure balance mechanism 20 are equal. This equalizes the forces experienced by the upper and lower ends of metal insert 60.
More specifically, the free end of the balance arm 21 is arc-shaped when viewed from the side, and the ends of the first guide rod 22 and the second guide rod 23 facing the balance arm 21 are flat, and the first guide rod 22 and the second guide rod 23 abut against the free end of the balance arm 21.
As shown in fig. 2, 4 and 6, an upper limit surface 211 is formed on the upper side of each free end of the balance arm 21, an upper stop surface 241 is formed on the case 24 at a position corresponding to the upper limit surface 211, and the highest position of the balance arm 21 during the swing can be limited by the upper stop surface 241.
The cross-sectional areas of the ends, close to the free end of the balance arm 21, of the first guide rod 22 and the second guide rod 23 are larger than the cross-sectional areas of the ends, far away from the free end of the balance arm 21, of the first guide rod 22 and the second guide rod 23, so that lower limiting surfaces 26 departing from one side, where the free end of the balance arm 21 is located, are formed on the first guide rod 22 and the second guide rod 23, lower stop surfaces 31 are formed on the first guide groove and the second guide groove at positions corresponding to the lower limiting surfaces 26, and the lowest positions of the first guide rod 22 and the second guide rod 23 in the downward movement process are limited through the lower stop surfaces 31.
Referring to fig. 6, in the present embodiment, a spacer 27 is disposed between the lower limiting surface 26 and the lower stop surface 31 to prevent the first guide bar 22 and the second guide bar 23 from directly colliding with the first guide groove and the second guide groove.
In summary, in the present invention, the first gate 11 and the second gate 12 are opened on the runner 10, that is, a new gate is additionally opened in addition to the gate connected to the cavity, and the pressure balance mechanism 20 is additionally provided. When the injection molding of the metal insert 60 product is performed, the metal insert 60, such as an aluminum insert, may be placed in a cavity of the product, and then the first guide rod 22 is pressed on the metal insert 60; in the injection molding process, because the pressures at various positions in the runner 10 are substantially equal, the second gate 12 can transmit a pressure to the balance arm 21 through the second guide rod 23 to drive the balance arm 21 to rotate, and the pressure of the second gate 12 is transmitted to the metal insert 60 after passing through the second guide rod 23, the balance arm 21 and the first guide rod 22 once, that is, the first guide rod 22 applies a force to the metal insert 60 from above the metal insert 60; and the injection molding material flowing into the cavity from the first gate 11 applies a force to the metal insert 60 from below the metal insert 60. That is, through the arrangement of the pressure balance mechanism 20, under the condition that no other driving force needs to be added, the metal insert 60 can simultaneously receive the pressure of the injection molding material in the runner 10 from the upper side and the lower side, so that the pressure of the upper side and the lower side of the metal insert 60 is balanced, the tolerance fluctuation of the metal insert 60 in the thickness direction can be balanced, and the metal insert 60 can not generate indentation due to the overlarge pressure in the runner 10. That is, the mold can automatically adjust the injection pressure in the runner 10, prevent the influence on the appearance of the product due to the overlarge injection pressure, and improve the yield.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a mould suitable for metal insert moulds plastics which characterized in that: including runner and pressure balance mechanism, seted up first runner and second runner in the runner, the die cavity intercommunication of first runner and product, pressure balance mechanism includes balance arm, first guide arm and second guide arm, the balance arm can set up through the pivot swingably in on the mould, so that the both ends of balance arm are formed with two free ends, the one end of first guide arm with a free end of balance arm links to each other, and the other end is used for right metal insert in the die cavity exerts pressure, the one end of second guide arm with another free end of balance arm links to each other, the other end with the second runner of runner links to each other.
2. The mold for metal insert injection molding according to claim 1, characterized in that: the mold suitable for metal insert injection molding comprises an upper half mold, a lower half mold and a side pressing block, wherein a cavity is formed among the upper half mold, the lower half mold and the side pressing block, a runner is formed on the lower half mold, and the pressure balance mechanism is arranged in the upper half mold.
3. The mold for metal insert injection molding according to claim 2, characterized in that: the pressure balance mechanism further comprises a box body, the balance arm is arranged in the box body, a containing part for containing the box body, a first guide groove and a second guide groove for containing the first guide rod and the second guide rod respectively are formed in the upper half die, the box body is arranged in the containing part, and the first guide rod and the second guide rod respectively extend into the first guide groove and the second guide groove.
4. The mold for metal insert injection molding according to claim 3, characterized in that: an upper limiting surface is formed on the upper side surface of each free end of the balance arm, an upper stop surface is formed on the box body at a position corresponding to the upper limiting surface, and the upper stop surface limits the highest position of the balance arm during swinging through the upper limiting surface.
5. The mold for metal insert injection molding according to claim 3, characterized in that: the cross-sectional areas of the ends, close to the free end of the balance arm, of the first guide rod and the second guide rod are larger than those of the ends, far away from the free end of the balance arm, of the first guide rod and the second guide rod, so that lower limiting surfaces departing from one side, where the free end of the balance arm is located, are formed on the first guide rod and the second guide rod, lower stopping surfaces are formed on the first guide groove and the second guide groove at positions corresponding to the lower limiting surfaces, and the lower stopping surfaces limit the lowest positions, during downward movement, of the first guide rod and the second guide rod through the lower limiting surfaces.
6. The mold for metal insert injection molding according to claim 5, wherein: and a gasket is arranged between the lower limiting surface and the lower stop surface.
7. The mold for metal insert injection molding according to claim 3, characterized in that: the first guide groove and the second guide groove are arranged along the vertical direction.
8. The mold for metal insert injection molding according to claim 1, characterized in that: the free end of the balance arm is arc-shaped when viewed from the side, the end faces of the first guide rod and the second guide rod, which face one end of the balance arm, are planes, and the first guide rod and the second guide rod are abutted against the free end of the balance arm.
9. The mold for metal insert injection molding according to claim 1, characterized in that: the distance between the contact position of the balance arm and the first guide rod and the rotating shaft is equal to the distance between the contact position of the balance arm and the second guide rod and the rotating shaft.
10. The mold for metal insert injection molding according to claim 1, characterized in that: the runner comprises a main runner, a first branch runner and a second branch runner, the first branch runner and the second branch runner are communicated with the main runner, the first sprue is formed in the first branch runner, and the second sprue is formed in the second branch runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210560635.1A CN114643681B (en) | 2022-05-23 | 2022-05-23 | Mould suitable for metal insert is moulded plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210560635.1A CN114643681B (en) | 2022-05-23 | 2022-05-23 | Mould suitable for metal insert is moulded plastics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114643681A true CN114643681A (en) | 2022-06-21 |
| CN114643681B CN114643681B (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210560635.1A Active CN114643681B (en) | 2022-05-23 | 2022-05-23 | Mould suitable for metal insert is moulded plastics |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319999A (en) * | 2022-10-14 | 2022-11-11 | 赫比(成都)精密塑胶制品有限公司 | Cubic injection mold and injection molding method |
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| CN115319999A (en) * | 2022-10-14 | 2022-11-11 | 赫比(成都)精密塑胶制品有限公司 | Cubic injection mold and injection molding method |
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