CN111958924A - Three-piece injection mold and injection molding method - Google Patents

Three-piece injection mold and injection molding method Download PDF

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Publication number
CN111958924A
CN111958924A CN202010916514.7A CN202010916514A CN111958924A CN 111958924 A CN111958924 A CN 111958924A CN 202010916514 A CN202010916514 A CN 202010916514A CN 111958924 A CN111958924 A CN 111958924A
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China
Prior art keywords
mold
core
die
power mechanism
ejector rod
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CN202010916514.7A
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Chinese (zh)
Inventor
周洪章
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Individual
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Individual
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Priority to CN202010916514.7A priority Critical patent/CN111958924A/en
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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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/20—Opening, closing or clamping
    • B29C33/22—Opening, closing or clamping by rectilinear movement
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut 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
    • B29C45/2602—Mould construction elements
    • B29C45/2606—Guiding or centering means
    • 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
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • B29C45/332—Mountings or guides therefor; Drives therefor
    • 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
    • B29C45/401—Ejector pin constructions or mountings
    • 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
    • B29C45/64—Mould opening, closing or clamping devices
    • B29C45/66—Mould opening, closing or clamping devices mechanical
    • 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
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • B29C45/332—Mountings or guides therefor; Drives therefor
    • B29C2045/334—Mountings or guides therefor; Drives therefor several transversely movable mould parts driven by a single drive means
    • 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
    • B29L2023/00—Tubular articles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention provides a three-piece injection mold which comprises a first side mold, a second side mold, a mold core, a pouring gate sleeve, a guide pillar, a guide sleeve and a mold opening power mechanism, wherein the first side mold is provided with a first guide pin; the mold core is arranged between the first side mold and the second side mold, and the length direction of the mold core is vertical; the sprue bush is connected with the second side die, and the sprue is arranged on the second side die; the guide pillar is fixedly connected with the first side die, guide sleeves are arranged on the main mounting plate and the second side die, and the guide pillar is connected with the guide sleeves in a left-right sliding mode; the die sinking power mechanism is connected with the first side die and the die core and used for driving the first side die and the die core to approach or depart from each other. The invention provides an injection molding method based on the three-piece injection mold. The invention has the advantages of small mold opening distance and suitability for injection molding of tubular or cylindrical products with larger length.

Description

Three-piece injection mold and injection molding method
Technical Field
The invention belongs to the field of injection molds, and particularly relates to a three-piece injection mold and an injection molding method.
Background
When a tubular or cylindrical product is injection-molded, the male die is used for molding the inner surface of the product, and the female die is used for molding the outer surface of the product. The structure of the injection molding machine in the prior art determines that the opening and closing directions of the female die and the male die are horizontal directions, so that the product is placed horizontally when a tubular or cylindrical product is injected, and the minimum distance between the female die and the male die needs to be greater than the length of the product after the mold is opened, so that the product can be taken out. Therefore, when a tubular or cylindrical product with a large length is injection molded, the mold opening distance is required to be large, so that a large injection molding machine is required to perform injection molding, which increases the difficulty of factory production scheduling. Therefore, the prior art is in need of improvement.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: when a tubular or cylindrical product with larger length is injected, the mold opening distance is large, and the requirement on an injection molding machine is high.
In order to achieve the purpose, the specific technical scheme of the invention is as follows:
a three-piece injection mold comprises a first side mold, a second side mold, a mold core, a pouring gate sleeve, a guide pillar, a guide sleeve and a mold opening power mechanism; the mold core is arranged between the first side mold and the second side mold, and the length direction of the mold core is vertical; the sprue bush is connected with the second side die, and the sprue is arranged on the second side die; the guide pillar is fixedly connected with the first side die, guide sleeves are arranged on the die core and the second side die, and the guide pillar is connected with the guide sleeves in a left-right sliding mode; the die sinking power mechanism is connected with the first side die and the die core and used for driving the first side die and the die core to approach or depart from each other.
As a further improved technical scheme, the device also comprises a main mounting plate, a mounting column, a connecting plate, a power mechanism, a mandril mounting plate, a mandril and a jacking power mechanism; the mounting column is fixedly connected with the main mounting plate and the connecting plate, the power mechanism is connected with the connecting plate and the mold core, and the mold core is connected with the main mounting plate in a vertical sliding manner; the ejection power mechanism is connected with the connecting plate and the ejector rod plate, the ejection power mechanism drives the ejector rod plate to move up and down relative to the connecting plate, the ejector rod and the ejector rod mounting plate are connected with the ejector rod plate, and the ejector rod is connected with the mold core in a sliding mode.
As a further improved technical scheme, the mould further comprises a push plate, the lower end of the mould core penetrates through the push plate, the push plate is connected with an ejector rod and the mould core, and the ejector rod drives the push plate to move up and down relative to the mould core.
As an optional technical scheme, the mold core is connected with a positioning groove, the second side mold is provided with a positioning block, and the positioning block is connected with the positioning groove in a left-right sliding mode.
As optional technical scheme, be connected with first locating piece and second locating piece on first side form and the second side form respectively, be equipped with arch and recess on first locating piece and the second locating piece respectively, protruding and recess horizontal sliding connection, the quantity of first locating piece and second locating piece is more than two.
According to the selectable technical scheme, the bottom of the first side die is connected with a core-pulling sliding block in a sliding mode, the second side die is connected with an inclined guide shaft, an inclined guide hole is formed in the core-pulling sliding block, and the inclined guide shaft is connected with the inclined guide hole in a sliding mode.
The invention also provides an injection molding method, which adopts the three-piece injection mold and comprises the following steps:
s1, after die assembly, injecting plastic melt around the die core from the sprue;
s2, separating the second side die from the first side die by using the die opening force of an injection molding machine, wherein the die core is relatively fixed with the first side die, and the second side die is disconnected with the injection molding product;
s3, the mold opening power mechanism separates the mold core from the first side mold, and the first side mold is disconnected from the injection molding product;
s4, taking the injection molding product off the mold core;
and S5, drawing the mold core and the first side mold to each other by the mold opening power mechanism, and driving the first side mold and the second side mold to approach each other by the injection molding machine to finish mold closing.
As a further improved technical scheme, the three-piece injection mold further comprises a main mounting plate, a mounting column, a connecting plate, a power mechanism, a mandril mounting plate, a mandril and a jacking power mechanism; the mounting column is fixedly connected with the main mounting plate and the connecting plate, the power mechanism is connected with the connecting plate and the mold core, and the mold core is connected with the main mounting plate in a vertical sliding manner; the ejection power mechanism is connected with the connecting plate and the ejector rod plate, the ejection power mechanism drives the ejector rod plate to move up and down relative to the connecting plate, the ejector rod and the ejector rod mounting plate are connected with the ejector rod plate, and the ejector rod is connected with the mold core in a sliding manner;
the following steps are also included between step S3 and step S4:
the power mechanism drives the mold core to move upwards relative to the main mounting plate;
the ejection power mechanism drives the ejector rod plate to move downwards relative to the connecting plate, and the ejector rod plate drives the ejector rod to eject the injection molding product downwards from the mold core;
the ejection power mechanism drives the ejector rod plate to move the ejector rod to move upwards for resetting;
the power mechanism drives the mold core to move downwards and reset.
The invention has the beneficial effects that: in the three-piece injection mold, the first side mold and the second side mold are used for forming the outer side wall of an injection product, the mold core is used for forming the inner side wall of the injection product, and the length direction of the product is arranged along the vertical direction during injection. When the mold is opened, the second side mold is separated from the first side mold by utilizing the mold opening force of the injection molding machine, the mold core moves along with the first side mold, and the second side mold is disconnected with the injection molding product; the mold opening power mechanism separates the mold core from the first side mold, and the first side mold is disconnected from the injection molding product; the injection-molded product is then removed from the mold core. The three-piece injection mold is suitable for products with larger injection length, has small requirement on the mold opening distance between the first side mold and the second side mold, has low requirement on the injection molding machine, can be adapted to various injection molding machines, and is convenient for factory production arrangement. The injection molding method has the advantages of small required mold opening distance, low requirement on the injection molding machine and convenience in production scheduling.
Drawings
FIG. 1 is a front view of the present invention;
fig. 2 is an exploded view of the present invention.
In the figure: the core mould comprises a first side mould 1, a guide post 12, a guide sleeve 13, a second side mould 2, a sprue bush 21, a mould core 3, a positioning block 311, a push plate 312, a power mechanism 32, a main mounting plate 33, a mounting post 34, a connecting plate 35, an ejector rod mounting plate 36, an ejector rod plate 37, an ejector rod 38, an ejector power mechanism 39, a mould opening power mechanism 4, a first positioning block 5, a second positioning block 6 and a core-pulling slide block 7.
Detailed Description
The invention is described in detail below with reference to specific embodiments.
Referring to fig. 1 to 2, the embodiment of the three-piece injection mold of the present invention specifically includes:
a three-piece injection mold comprises a first side mold 1, a second side mold 2, a mold core 3, a pouring gate sleeve 21, a guide pillar 12, a guide sleeve 13 and a mold opening power mechanism 4; the mold core 3 is arranged between the first side mold 1 and the second side mold 2, and the length direction of the mold core 3 is vertical; the sprue bush 21 is connected with the second side die 2, and the sprue is arranged on the second side die 2; the guide post 12 is fixedly connected with the first side die 1, guide sleeves 13 are arranged on the die core 3 and the second side die 2, and the guide post 12 is connected with the guide sleeves 13 in a left-right sliding manner; the die opening power mechanism 4 is connected with the first side die 1 and the die core 3 and is used for driving the first side die 1 and the die core 3 to approach or depart from each other.
In the invention, the first side mold 1 and the second side mold 2 are both used for forming the outer side wall of an injection product, the mold core 3 is used for forming the inner side wall of the injection product, the length direction of the product is arranged along the up-down direction during injection, and the mold opening power mechanism 4 can be an oil cylinder or an air cylinder and the like. When the mold is opened, the second side mold 2 is separated from the first side mold 1 by utilizing the mold opening force of an injection molding machine, the mold core 3 is fixed relative to the first side mold 1, the second side mold 2 is disconnected from an injection molding product, and a sprue is also disconnected from the injection molding product; the mold opening power mechanism 4 separates the mold core 3 from the first side mold 1, and the first side mold 1 is disconnected from the injection molding product; the injection-molded product is then removed from the core 3 in the up-down direction. The three-piece injection mold is suitable for injection molding of tubular or cylindrical products with large length, the requirement of the three-piece injection mold on the mold opening distance between the first side mold 1 and the second side mold 2 is small, after mold opening is carried out, the injection molding product can be taken down from the mold core 3 as long as the first side mold 1 and the second side mold 2 do not interfere with the injection molding product, and the mold opening distance is far smaller than the length of the tubular or cylindrical products. The three-piece injection mold is adopted to produce tubular or cylindrical products with larger length, the requirement on the injection molding machine is low, the types of the injection molding machines which can be adapted are various, and the production arrangement of a factory is convenient.
In the preferred embodiment, the device further comprises a main mounting plate 33, a mounting column 34, a connecting plate 35, a power mechanism 32, a mandril mounting plate 36, a mandril plate 37, a mandril 38 and a jacking power mechanism 39; the mounting column 34 is fixedly connected with the main mounting plate 33 and the connecting plate 35, the power mechanism 32 is connected with the connecting plate 35 and the mold core 3, and the mold core 3 is connected with the main mounting plate 33 in a vertical sliding manner; the ejection power mechanism 39 is connected with both the connecting plate 35 and the ejector rod plate 37, the ejection power mechanism 39 drives the ejector rod plate 37 to move up and down relative to the connecting plate 35, the ejector rod 38 and the ejector rod mounting plate 36 are connected with the ejector rod plate 37, and the ejector rod 38 is connected with the mold core 3 in a sliding manner. In this embodiment, the connecting plate 35 may be disposed above or below the main mounting plate 33, preferably, the connecting plate 35 is disposed above the main mounting plate 33, and a worker takes a part from the upper portion of the three-piece injection mold, so that the mounting height of the three-piece injection mold can be reduced, and the three-piece injection mold can be conveniently mounted. In the embodiment shown in fig. 2, the mold core 3 is driven to move upwards by the power mechanism 32, and the ejector power mechanism 39 drives the ejector rod 38 to move downwards, and the motion is matched to enable the product to move downwards relative to the mold core 3 so as to realize demolding. The ejection power mechanism 39 can be an oil cylinder, an air cylinder or the like, and the ejection power mechanism 39 drives the ejector rod 38 to move up and down through the ejector rod plate 37 so as to eject a product from the mold core 3, so that a worker can take the product conveniently.
Further, the mould comprises a push plate 312, the lower end of the mould core 3 penetrates through the push plate 312, the push plate 312 is connected with a top rod 38, and the top rod 38 drives the push plate 312 to move up and down relative to the mould core 3. The wall thickness of the tubular or cylindrical product is thinner, and the use of the push plate 312 to push the product off the mold core 3 is more suitable for thin-walled products than the direct use of the ejector rod 38.
In some embodiments, the mold core 3 is connected with a positioning groove, the second side mold 2 is provided with a positioning block 311, and the positioning block 311 is connected with the positioning groove in a left-right sliding manner. The positioning groove and the positioning block 311 are used for improving the matching precision of the mold core 3 and the second side mold 2.
In some embodiments, the first side mold 1 and the second side mold 2 are respectively connected with a first positioning block 5 and a second positioning block 6, the first positioning block 5 and the second positioning block 6 are respectively provided with a protrusion and a groove, the protrusion and the groove are connected in a sliding manner, and the number of the first positioning block 5 and the number of the second positioning block 6 are more than two. The first positioning block 5 and the second positioning block 6 can be connected to the side walls of the first side die 1 and the second side die 2, and the first positioning block 5 and the second positioning block 6 can improve the positioning accuracy of the first side die 1 and the second side die 2 in the vertical direction and the left-right direction.
Further, the bottom of the first side mold 1 is connected with a core-pulling sliding block 7 in a sliding mode, the second side mold 2 is connected with an inclined guide shaft, an inclined guide hole is formed in the core-pulling sliding block 7, and the inclined guide shaft is connected with the inclined guide hole in a sliding mode. The core-pulling slide block 7 is matched with the mold core 3, core pulling can be respectively carried out from the upper part and the lower part of a product, and the product with a complex upper end structure and a complex lower end structure is formed.
The tubular or cylindrical product having a large length in the present invention means that the length of the product has a large value regardless of the radial dimension and aspect ratio of the product.
The invention also provides an injection molding method, which adopts the three-piece injection mold and comprises the following steps: s1, after the mold is closed, injecting plastic melt around the mold core 3 from the sprue; s2, separating the second side mold 2 from the first side mold 1 by using the mold opening force of an injection molding machine, fixing the mold core 3 relative to the first side mold 1, and disconnecting the second side mold 2 from an injection molding product; s3, the mold opening power mechanism 4 separates the mold core 3 from the first side mold 1, and the first side mold 1 is disconnected with the injection molding product; s4, taking the injection molding product off the mold core 3; and S5, the mold opening power mechanism 4 draws the mold core 3 and the first side mold 1 to each other, and the injection molding machine drives the first side mold 1 and the second side mold 2 to approach each other, so that mold closing is completed. The tubular or cylindrical product with larger length is injection-molded by adopting the method of the invention, the distance separating the second side die 2 from the first side die 1 in the steps S2 and S3 is only required to ensure that the vertical detachment of the injection-molded product from the die core 3 is not interfered, the distance is related to the surface characteristics of the injection-molded product, the distance is related to the size difference of the upper part and the lower part of the injection-molded product, and the distance is unrelated to the length and the width of the injection-molded product, so that the tubular or cylindrical injection-molded product with larger length can be taken down from the die core 3 under the condition of smaller die opening distance, a large-scale injection molding machine is not required for production, and the production scheduling.
Further, the three-piece injection mold further comprises a main mounting plate 33, a mounting column 34, a connecting plate 35, a power mechanism 32, a push rod mounting plate 36, a push rod plate 37, a push rod 38 and a push-out power mechanism 39; the mounting column 34 is fixedly connected with the main mounting plate 33 and the connecting plate 35, the power mechanism 32 is connected with the connecting plate 35 and the mold core 3, and the mold core 3 is connected with the main mounting plate 33 in a vertical sliding manner; the ejection power mechanism 39 is connected with both the connecting plate 35 and the ejector rod plate 37, the ejection power mechanism 39 drives the ejector rod plate 37 to move up and down relative to the connecting plate 35, the ejector rod 38 and the ejector rod mounting plate 36 are connected with the ejector rod plate 37, and the ejector rod 38 is connected with the mold core 3 in a sliding manner; the following steps are also included between step S3 and step S4: the power mechanism 32 drives the mold core 3 to move upwards relative to the main mounting plate 33; the ejection power mechanism 39 drives the ejector rod plate 37 to move downwards relative to the connecting plate 35, the ejector rod plate 37 drives the ejector rod 38 to move downwards, and the injection molding product is ejected downwards from the mold core 3 and falls; the ejection power mechanism 39 drives the ejector rod plate 37 to drive the ejector rod 38 to move upwards for resetting; the power mechanism 32 drives the mold core 3 to move downwards and reset. Through power unit 32 drive mold core 3 and reciprocate, can avoid the not enough inconvenient problem of a messenger's piece of getting of lower part space to move up mold core 3 or move down and make the product remove from between first side mould 1 and the second side mould 2, can also avoid the incident that the quick-witted mistake compound die of moulding plastics arouses.
The features of the embodiments and embodiments described above may be combined with each other without conflict.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (8)

1. The utility model provides a three-piece type injection mold which characterized in that: the mold comprises a first side mold, a second side mold, a mold core, a pouring gate sleeve, a guide pillar, a guide sleeve and a mold opening power mechanism;
the mold core is arranged between the first side mold and the second side mold, and the length direction of the mold core is vertical;
the sprue bush is connected with the second side die, and the sprue is arranged on the second side die;
the guide pillar is fixedly connected with the first side die, guide sleeves are arranged on the die core and the second side die, and the guide pillar is connected with the guide sleeves in a left-right sliding mode;
the die sinking power mechanism is connected with the first side die and the die core and used for driving the first side die and the die core to approach or depart from each other.
2. The three-piece injection mold of claim 1, wherein: the device also comprises a main mounting plate, a mounting column, a connecting plate, a power mechanism, a mandril mounting plate, a mandril and a jacking power mechanism;
the mounting column is fixedly connected with the main mounting plate and the connecting plate, the power mechanism is connected with the connecting plate and the mold core, and the mold core is connected with the main mounting plate in a vertical sliding manner;
the ejection power mechanism is connected with the connecting plate and the ejector rod plate, the ejection power mechanism drives the ejector rod plate to move up and down relative to the connecting plate, the ejector rod and the ejector rod mounting plate are connected with the ejector rod plate, and the ejector rod is connected with the mold core in a sliding mode.
3. The three-piece injection mold of claim 2, wherein: the lower end of the mold core penetrates through the push plate, the push plate is connected with the ejector rod and the mold core, and the ejector rod drives the push plate to move up and down relative to the mold core.
4. The three-piece injection mold of claim 1, wherein: the mold core is connected with a positioning groove, the second side mold is provided with a positioning block, and the positioning block is connected with the positioning groove in a left-right sliding mode.
5. The three-piece injection mold of claim 1, wherein: be connected with first locating piece and second locating piece on first side form and the second side form respectively, be equipped with arch and recess on first locating piece and the second locating piece respectively, protruding and recess horizontal sliding connection, the quantity of first locating piece and second locating piece is more than two.
6. The three-piece injection mold of claim 1, wherein: the bottom sliding connection of first side form has the slider of loosing core, be connected with oblique guide shaft on the second side form, be equipped with oblique guide hole on the slider of loosing core, oblique guide shaft with oblique guide hole sliding connection.
7. An injection molding method, wherein the three-piece injection mold according to claim 1 is used, comprising the steps of:
s1, after die assembly, injecting plastic melt around the die core from the sprue;
s2, separating the second side die from the first side die by using the die opening force of an injection molding machine, wherein the die core is relatively fixed with the first side die, and the second side die is disconnected with the injection molding product;
s3, the mold opening power mechanism separates the mold core from the first side mold, and the first side mold is disconnected from the injection molding product;
s4, taking the injection molding product off the mold core;
and S5, drawing the mold core and the first side mold to each other by the mold opening power mechanism, and driving the first side mold and the second side mold to approach each other by the injection molding machine to finish mold closing.
8. An injection molding method according to claim 7, characterized in that: the three-piece injection mold also comprises a main mounting plate, a mounting column, a connecting plate, a power mechanism, a mandril mounting plate, a mandril and a jacking power mechanism; the mounting column is fixedly connected with the main mounting plate and the connecting plate, the power mechanism is connected with the connecting plate and the mold core, and the mold core is connected with the main mounting plate in a vertical sliding manner; the ejection power mechanism is connected with the connecting plate and the ejector rod plate, the ejection power mechanism drives the ejector rod plate to move up and down relative to the connecting plate, the ejector rod and the ejector rod mounting plate are connected with the ejector rod plate, and the ejector rod is connected with the mold core in a sliding manner;
the following steps are also included between step S3 and step S4:
the power mechanism drives the mold core to move upwards relative to the main mounting plate;
the ejection power mechanism drives the ejector rod plate to move downwards relative to the connecting plate, and the ejector rod plate drives the ejector rod to eject the injection molding product downwards from the mold core;
the ejection power mechanism drives the ejector rod plate to move the ejector rod to move upwards for resetting;
the power mechanism drives the mold core to move downwards and reset.
CN202010916514.7A 2020-09-03 2020-09-03 Three-piece injection mold and injection molding method Pending CN111958924A (en)

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Application Number Priority Date Filing Date Title
CN202010916514.7A CN111958924A (en) 2020-09-03 2020-09-03 Three-piece injection mold and injection molding method

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Application Number Priority Date Filing Date Title
CN202010916514.7A CN111958924A (en) 2020-09-03 2020-09-03 Three-piece injection mold and injection molding method

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CN111958924A true CN111958924A (en) 2020-11-20

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203779803U (en) * 2014-03-28 2014-08-20 台州市凯华塑业有限公司 Traceless side-pulling automatic demoulding mechanism for injection mould
CN204123620U (en) * 2014-09-29 2015-01-28 浙江庄晨电器有限公司 The side direction ejecting mechanism of injection mold floating-type core
CN104786432A (en) * 2015-04-16 2015-07-22 上海昌余通讯科技有限公司 Automatic mould discharge mechanism
CN104802372A (en) * 2015-05-17 2015-07-29 耿晓冬 Slide ejection and mould opening type injection mould
CN106584796A (en) * 2016-12-26 2017-04-26 浙江工商职业技术学院 Oil cylinder driving ejection core pulling mechanism

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203779803U (en) * 2014-03-28 2014-08-20 台州市凯华塑业有限公司 Traceless side-pulling automatic demoulding mechanism for injection mould
CN204123620U (en) * 2014-09-29 2015-01-28 浙江庄晨电器有限公司 The side direction ejecting mechanism of injection mold floating-type core
CN104786432A (en) * 2015-04-16 2015-07-22 上海昌余通讯科技有限公司 Automatic mould discharge mechanism
CN104802372A (en) * 2015-05-17 2015-07-29 耿晓冬 Slide ejection and mould opening type injection mould
CN106584796A (en) * 2016-12-26 2017-04-26 浙江工商职业技术学院 Oil cylinder driving ejection core pulling mechanism

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Application publication date: 20201120