CN216914797U - Plastic bottle blank mold with split type mold core - Google Patents
Plastic bottle blank mold with split type mold core Download PDFInfo
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- CN216914797U CN216914797U CN202220136418.5U CN202220136418U CN216914797U CN 216914797 U CN216914797 U CN 216914797U CN 202220136418 U CN202220136418 U CN 202220136418U CN 216914797 U CN216914797 U CN 216914797U
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Abstract
The utility model discloses a plastic mold, and particularly relates to a plastic bottle blank mold with a split type mold core. The mold core comprises a front core body and a rear core body, wherein the mold core is arranged between the front mold frame and the rear mold frame in a split mode, the mold core comprises the front core body and the rear core body, a tenon is arranged at the rear end of the front core body and inserted into a groove formed in the front end of the rear core body to achieve connection of the front core body and the rear core body. The front core body and the rear core body are provided with first air passages communicated with the rear mold frame and the rear mold fixing plate, and the rear core body is provided with second air passages communicated with the rear mold frame and the rear mold fixing plate. The rear end of the rear core body is fixedly arranged on the inner bottom surface of the front concave cavity of the rear die frame, and the rear end surface of the front die frame is provided with a boss and a die core cavity. The front core body and the rear core body of the mold core component are separated, and the pulling force of the mold core is dispersed and acted on the inner wall of the plastic bottle body, so that the shape and the wall thickness uniformity of the plastic bottle body cannot be influenced.
Description
Technical Field
The utility model discloses a plastic bottle blank mold with a split type mold core, relates to a plastic mold, and particularly relates to a split type mold core structure of a plastic bottle blowing mold.
Background
The most common molding device is used in the production of plastic products in plastic molds, wherein most of the plastic bottle manufacturing processes adopt an injection molding process and a blow molding process, and the injection molding process and the blow molding process respectively adopt a plastic injection mold and a plastic blow molding mold. Specifically, the plastic blow mold is suitable for plastic bottle products with thinner bottle walls, and the plastic injection mold is more suitable for plastic bottle products with thicker bottle walls. In the plastic bottle injection mold, a mold core cavity arranged in a front mold assembly is the outer wall of a plastic bottle body, and a mold core body arranged in the front mold assembly is the inner wall of the plastic bottle body.
Chinese patent No. CN 210758701U discloses a bottle blank mold core, which is integrally arranged, wherein the core head, the shaft body, the shaft neck and the shaft seat form a trapezoidal arrangement in the patent document, and the inner wall of the plastic bottle body or the inner wall of the bottle body corresponding to the core head, the shaft body, the shaft neck and the shaft seat are also of a trapezoidal structure. When the mold is opened, the bottle blank mold cores arranged in an integrated trapezoidal mode are beneficial to being pulled out of the plastic bottle, and the bottle blank mold cores arranged in an integrated trapezoidal mode for producing the plastic bottle with the trapezoidal structure have small influence on the structure of the plastic bottle body when the mold is opened. When the plastic bottle body is the thick straight structure such as back before, the bottle embryo mold core of integrative trapezoidal setting can be by force by plastic bottle body cavity in the mould die sinking in-process and pulling out, and thick bottle embryo mold core such as front and back can produce powerful pulling force to the plastic bottle body under the effect of pulling force, influences the shape of plastic bottle body and the degree of consistency of wall thickness then, and above-mentioned condition shows especially outstanding in producing the thin wall plastic bottle.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the hollow cavity of the plastic bottle body is forcibly pulled out in the mold opening process of the integrally trapezoidal bottle blank mold in the background technology, so that the shape and the wall thickness uniformity of the plastic bottle body are affected, the utility model provides the plastic bottle blank mold with the split type mold core.
The mold core adopts the technical scheme that the mold core comprises a front core body and a rear core body which are separately provided with mold core components, the front core body and the rear core body which are separately provided are communicated with each other to form a first air passage and a second air passage, the first air passage acts on the demoulding separation of the plastic bottle and the mold core, and the second air passage acts on the demoulding separation of the front core body and the rear core body which are separately provided.
The plastic bottle blank mold with the split mold core sequentially comprises a front mold fixing plate, a water gap plate, a front mold frame, a rear mold frame and a rear mold fixing plate, wherein the split mold core is arranged between the front mold frame and the rear mold frame.
Specifically, the mold core comprises a front core body and a rear core body, a tenon is arranged at the rear end of the front core body and inserted into a groove formed in the front end of the rear core body to connect the front core body and the rear core body, first air passages communicated with the rear mold frame and the rear mold fixing plate are formed in the front core body and the rear core body, and a second air passage communicated with the rear mold frame and the rear mold fixing plate is formed in the rear core body. The rear end of the rear core body is fixedly arranged on the inner bottom surface of the front concave cavity of the rear die frame, and the rear end surface of the front die frame is provided with a boss and a die core cavity. After the die is closed, the die core is inserted into the die core cavity of the front die frame, and the cavity formed by the outer wall of the die core and the inner wall of the die core cavity is the product position of the die.
Furthermore, the front end of the first air passage of the front core body is provided with an air cone opening, an air slide way is arranged between the air cone opening and the first air passage, and a glue sealing valve is arranged in the air cone opening and the air slide way.
Further specifically, it includes valve stem, extension spring, separation blade and set screw to glue the valve, and the valve stem slidable wears to hang in first gas duct and the gas slide, and the valve awl that its front end set up is arranged in the wind cone, and the extension spring sets up in the gas slide and wears the cover on the valve stem to fix a position through set screw and separation blade that the valve stem rear end set up.
Furthermore, the mold core further comprises a connecting slide rod with an oval cross section, the connecting slide rod is arranged in a through hole formed in the connecting end of the front core body and the connecting end of the rear core body respectively, and the cross section shape of the through hole is matched with that of the connecting slide rod.
Furthermore, internal threads are respectively arranged at the outer ends of the through holes of the front core body and the rear core body, an external thread pipe is screwed in the internal thread of the rear core body, a bolt head is arranged at one end of the connecting slide rod, the external thread arranged at one end of the connecting slide rod is screwed on the internal thread of the front core body, and the bolt head end of the connecting slide rod is sleeved in the external thread pipe screwed in the through hole of the rear core body.
Preferably, the rear end of the outer wire tube is provided with an inner embedding groove which is matched with the shape of the sliding rod connecting bolt head and can embed the sliding rod connecting bolt head.
Further preferably, a pressure spring is arranged in the through hole of the rear core body.
Furthermore, the front core body and the rear core body are provided with cold air circulation channels communicated with the rear mold frame and the rear mold fixing plate.
Furthermore, a wind top groove communicated with a second air passage is formed in the upper end face of the outer edge of the groove of the rear core body.
The utility model has the beneficial effects that:
1. the plastic bottle blank mold with the split type mold core provided by the utility model comprises the mold core component which is separately arranged on the front core body and the rear core body, the front core body and the rear core body of the mold core component are separated in the mold opening process of the mold, the pulling force of the mold core is dispersed and acted on the inner wall of the plastic bottle body, and further, the shape of the plastic bottle body and the uniformity of the wall thickness cannot be influenced.
2. According to the plastic bottle blank mold with the split type mold core, the first air passage and the second air passage are matched with each other, the first air passage is matched with the front core body, the second air passage is matched with the rear core body, the double air passages are matched with the split type mold core assembly, and the mold core assembly is arranged in a split mode to perform demolding, so that plastic with a thinner bottle body can be more easily shed by the mold core assembly.
The advantages of the utility model are not limited to this description, but are described in more detail in the detailed description for better understanding.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is an exploded view (I) of an overall three-dimensional structure of a plastic bottle blank mold with a split type mold core according to the present invention;
FIG. 2 is an exploded view of the overall three-dimensional structure of a plastic bottle preform mold with a split mold core according to the present invention;
FIG. 3 is a three-dimensional structure exploded view of a split mold core of the plastic bottle blank mold with a split mold core according to the present invention;
FIG. 4 is a three-dimensional schematic diagram of the connection of the rear mold frame, the rear mold fixing plate and the split mold core of the plastic bottle blank mold with the split mold core according to the utility model
FIG. 5 is a schematic longitudinal sectional view of a split mold core of a plastic bottle blank mold with a split mold core according to the present invention;
FIG. 6 is a schematic view of the connection between the front mold core and the sealing valve of the plastic bottle blank mold with a split mold core according to the present invention;
FIG. 7 is a three-dimensional schematic view of a plastic bottle preform mold sealing valve with a split mold core according to the present invention;
FIG. 8 is a schematic view (I) illustrating the connection between the front mold core and the connecting rod of the plastic bottle blank mold with the split mold core according to the present invention;
FIG. 9 is a schematic view (II) illustrating the connection between the front mold core and the connecting slide rod of the plastic bottle blank mold with the split mold core according to the present invention;
FIG. 10 is a three-dimensional schematic view of a plastic bottle preform mold with split mold cores according to the present invention;
FIG. 11 is a schematic view (III) illustrating the connection between the front mold core and the connecting slide rod of the plastic bottle blank mold with the split mold core according to the present invention;
FIG. 12 is a schematic view of a cooling air circulation duct of a mold for plastic bottle preforms with a split-type mold core according to the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the plastic bottle preform mold with a split-type mold core more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Accordingly, the following detailed description of the embodiments of the plastic bottle parison mold with split core of the present invention, as presented in the accompanying drawings, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The utility model relates to a plastic bottle blank mold with a split type mold core.
Referring to fig. 1, the plastic bottle preform mold sequentially includes a front mold fixing plate 1, a water gap plate 2, a front mold frame 3, a rear mold frame 4, a rear mold fixing plate 5, and a mold core 6 disposed in a split manner.
Specifically, referring to fig. 3, the mold core 6 includes a front core body 61 and a rear core body 62, a tenon 61a is disposed at the rear end of the front core body 61, a groove 62a is disposed at the front end of the rear core body 62, and the front core body 61 is inserted into the groove 62a of the rear core body 62 through the tenon 61a to connect the front core body 61 and the rear core body 62.
Referring to fig. 1-2, the rear end of the rear core 62 is fixedly disposed on the inner bottom surface of the front cavity 41 of the rear mold frame 4, and the rear end surface of the front mold frame 3 is provided with a boss 31 and a mold core cavity 32. After the mold is closed, the mold core 6 is inserted into the mold core cavity 32 of the front mold frame 3, and a cavity formed by the mold core 6 and the inner wall of the mold core cavity 32 is a product position of the mold.
In order to avoid the damage to the plastic bottle body caused by forcibly pulling out the hollow cavity of the plastic bottle body in the mold opening process of the bottle blank mold, an air pressure channel for assisting the plastic bottle in demoulding is arranged in the mold core.
Specifically, referring to fig. 4-5, the front core 61 and the rear core 62 are provided with a first air duct 6a communicated with the rear mold frame 4 and the rear mold fixing plate 5
The rear core body 62 is provided with a second air duct 6b which is communicated with the rear mold frame 4 and the rear mold fixing plate 5.
The utility model relates to a plastic bottle blank mold with a split type mold core, which is used for completing injection molding of a plastic bottle and demolding during mold opening through the following steps.
As shown in fig. 1, after the front mold assembly (front mold fixing plate 1, water gap plate 2, front mold frame 3) and the rear mold assembly (rear mold frame 4, rear mold fixing plate 5) are closed, the mold core 6 is inserted into the mold core cavity 32 of the front mold frame 3, and the cavity formed by the outer wall of the mold core 6 and the inner wall of the mold core cavity 32 is filled with liquid plastic by the injection molding machine.
As shown in fig. 4, after the liquid plastic is solidified and formed, the injection molding machine drives the front mold assembly (the front mold fixing plate 1, the water gap plate 2 and the front mold frame 3) and the rear mold assembly (the rear mold frame 4 and the rear mold fixing plate 5) to open and separate. The high-pressure gas is used for ejecting the plastic bottle A outwards and demoulding by a first air passage 6a which is arranged by the penetration of the rear mold fixing plate 5, the rear mold frame 4, the rear core body 62 and the front core body 61. Meanwhile, the front core body 61 is pushed forwards by the high-pressure gas through the second gas passage 6b which is formed by the rear die fixing plate 5, the rear die frame 4 and the rear core body 62 in a penetrating manner, and the high-pressure gas in the second gas passage 6b is extruded through a connecting gap between the rear core body 62 and the front core body 61 to further push the plastic bottle A to be pushed outwards for demoulding.
In order to avoid the blockage of the air passage caused by the liquid plastic material entering the first air passage 6a of the front core body 61 during the injection process of the injection molding machine.
Further, as shown in fig. 6, a wind cone opening 6a1 is arranged at the front end of the first air duct 6a of the front core body 61, an air slide way 6a2 is arranged between the wind cone opening 6a1 and the first air duct 6a, and a glue sealing valve 6b is arranged in the wind cone opening 6a1 and the air slide way 6a 2.
As shown in fig. 7, the glue sealing valve 6b includes a valve stem 6b1, a tension spring 6b2, a baffle 6b3 and a fixing screw 6b4, the valve stem 6b1 is slidably inserted into the first air duct 6a and the air slide 6a2, the valve cone 6c1a is placed in the air cone opening 6a1, and the tension spring 61b is disposed in the air slide 6a2 and is inserted into the valve stem 6b1 through the fixing screw 6b4 and the baffle 6b3 disposed at the rear end of the valve stem 6b 1.
When the mold is closed, the first air duct 6a has no high-pressure air, the valve cone 6c1a of the valve stem 6b1 of the glue sealing valve 6b seals the first air duct 6a in the air cone opening 6a1 under the action of the tension spring 6b2, and at this time, the liquid plastic material entering the cavity between the outer wall of the mold core 6 and the inner wall of the mold core cavity 32 is blocked outside the first air duct 6a by the valve cone 6c1 a. When the mold is opened, the high-pressure gas entering the first air passage 6a pushes the valve cone 6c1a of the valve rod 6b1 to move forwards, and the high-pressure gas is flushed out from a gap between the valve cone 6a1 and the valve cone 6c1a to push the plastic bottle A to eject outwards for demoulding.
Because the length of the connecting tenon and the connecting groove between the front core body and the rear core body is limited, the front core body is separated from the rear core body under the impact of high-pressure gas in the second air passage when the mold is opened.
Further please refer to fig. 8, the connecting ends of the front core 61 and the rear core 62 are respectively provided with through holes 6c which are communicated with each other, the mold core 6 further comprises a connecting rod 6d with an oval cross section, the connecting rod 6d is arranged in the through holes 6c respectively arranged at the connecting ends of the front core 61 and the rear core 62, and the cross section of the through holes 6c is matched with the cross section of the connecting rod 6 d.
When the front core body 61 moves for a distance exceeding the width of the tenon 61a of the front core body 61 under the impact of the high-pressure gas in the second air passage 6b, the slide rod 6d arranged in the through hole 6c of the front core body 61 and the rear core body 62 supports the front core body 61, and the front core body 61 and the rear core body 62 are prevented from falling off and separating. The slide rod 6d and the through-hole 6c having an oval cross section have a function of preventing the accidental rotation of the front core 61 when the movement distance exceeds the width of the tenon 61 a.
In order to further avoid the separation that the front core body drops from the rear core body under the impact of high-pressure gas in the second air passage when the die is opened, the separation that the front core body drops from the connecting slide rod when the movement distance of the front core body is overlong is further avoided.
Specifically, referring to fig. 8, the outer ends of the through holes 6c of the front core body 61 and the rear core body 62 are respectively provided with internal threads 6c1, and the external thread tube 6c2 is screwed in the internal threads 6c1 of the rear core body 62. One end of the slide connecting rod 6d is provided with a bolt head 6d2, and one end of the slide connecting rod is provided with an external thread 6d1, the bolt head 6d2 end of the slide connecting rod 6d is sleeved and slid in an external thread pipe 6c2 screwed in the rear core body through hole 6c, and the external thread 6d1 end of the slide connecting rod 6d is screwed in the internal thread 6c1 of the front core body 61.
The connecting slide rod 6d connected with the front core body 61 through screw threads slides in the cavity of the outer wire tube 6c2 screwed in the rear core body 62, and the bolt head 6d2 arranged at one end of the connecting slide rod 6d has a limiting and positioning function on the forward movement distance of the front core body 61, so that the forward movement distance of the front core body 61 is further prevented from exceeding the length of the connecting slide rod 6d and falling off and separating from the connecting slide rod 6 d.
Preferably, as shown in fig. 10, the rear end of the outer wire tube 6c2 is provided with an inner groove 6c21 matching the shape of the bolt head 6d2 of the connecting slide bar 6d, and the bolt head 6d2 of the connecting slide bar 6d can be embedded in the inner groove 6c21 of the outer wire tube 6c 2.
As shown in fig. 11, it is more preferable that a compression spring 6e is provided in the through hole 6c of the rear core body 62. When the mold is closed as shown in fig. 12, the front core body 61 and the rear core body 62 are tightly combined by the front mold assembly and the rear mold assembly, and the front end of the compression spring 6e is abutted against the bolt head 6d2 of the connecting slide bar 6d in the through hole 6c of the rear core body 62. When the mold is opened, the pressure spring 6e is matched with high-pressure gas in the second air channel 6b to eject the front core body 61 forwards under the action of the self elasticity to complete the demolding operation.
In order to accelerate the solidification of the liquid plastic in the cavity formed by the outer wall of the mold core 6 and the inner wall of the mold core cavity 32, as shown in fig. 12, a cold air circulation channel 6f communicated with the rear mold frame 4 and the rear mold fixing plate 5 is arranged on the front core body 61 and the rear core body 62, and cold air enters from one end of the circulation channel 6f and is discharged from the other end to play a role in accelerating the cooling of the mold core 6.
According to the plastic bottle blank mold with the split mold core, after the front core body and the rear core body are opened, high-pressure gas in the second air passage is difficult to be flushed out from a connecting gap between the front core body and the rear core body due to the fact that the connection tightness of the tenon and the groove of the connecting end of the front core body and the rear core body is strong.
Preferably, as shown in fig. 3, a wind ceiling groove 62a1 penetrating the second air duct 6b is provided on an upper end surface of an outer edge of the groove 62a of the rear core 62. The high-pressure gas in the second gas duct 6b enters the wind ceiling groove 62a1 to increase the impact area of the high-pressure gas on the rear core, so that the front core 61 is more easily separated from the rear core 62.
The above is a detailed description of the plastic bottle blank mold with the split mold core provided by the embodiment of the present invention, and a person skilled in the art may change the specific implementation manner and the application scope according to the idea of the embodiment of the present invention. In summary, the content of the present specification should not be construed as limiting the present invention, and any modification made according to the design concept of the present invention is within the scope of the present invention.
Claims (9)
1. A plastic bottle blank mold with a split mold core sequentially comprises a front mold fixing plate, a water gap plate, a front mold frame, a rear mold frame and a rear mold fixing plate, and is characterized by also comprising the split mold core arranged between the front mold frame and the rear mold frame,
the mold core comprises a front core body and a rear core body, wherein the rear end of the front core body is provided with a tenon which is inserted into a groove arranged at the front end of the rear core body to realize the connection of the front core body and the rear core body;
the front core body and the rear core body are provided with first air passages communicated with the rear mold frame and the rear mold fixing plate, and the rear core body is provided with second air passages communicated with the rear mold frame and the rear mold fixing plate;
the rear end of the rear core body is fixedly arranged on the inner bottom surface of the front concave cavity of the rear die frame, and the rear end surface of the front die frame is provided with a boss and a die core cavity;
after the die is closed, the die core is inserted into the die core cavity of the front die frame, and the cavity formed by the outer wall of the die core and the inner wall of the die core cavity is the product position of the die.
2. The plastic bottle blank mold with the split mold core as claimed in claim 1, wherein a wind cone port is provided at the front end of the first air passage of the front core body;
an air slide way is arranged between the air cone opening and the first air channel;
and a glue sealing valve is arranged in the wind cone opening and the air slide way.
3. The plastic bottle blank mold with the split-type mold core as claimed in claim 2, wherein the glue sealing valve comprises a valve stem, a tension spring, a catch and a fixing screw;
the valve rod can be slidably hung in the first air passage and the air slide way, and a valve cone arranged at the front end of the valve rod is arranged in the air cone;
the tension spring is arranged in the air slide way, is sleeved on the valve rod in a penetrating manner, and is positioned through a fixing screw and a blocking piece arranged at the rear end of the valve rod.
4. The plastic bottle blank mold with the split-type mold core as claimed in claim 1, wherein the mold core further comprises a connecting slide bar with an oval cross section;
the connecting slide rod is arranged in a through hole respectively formed in the connecting end of the front core body and the rear core body;
the cross section shape of the through connecting hole is matched with that of the connecting sliding rod.
5. The plastic bottle blank mold with the split mold core as claimed in claim 4, wherein the outer ends of the through holes of the front core body and the rear core body are respectively provided with an internal thread, and an external thread pipe is screwed in the internal thread of the rear core body;
one end of the connecting sliding rod is provided with a bolt head, and an external thread arranged at one end of the connecting sliding rod is screwed on the internal thread of the front core body;
and the bolt head end of the connecting sliding rod is sleeved and slid in an outer wire tube screwed in the through connecting hole of the rear core body.
6. The plastic bottle blank mold with the split mold core as claimed in claim 5, wherein the rear end of the outer tube is provided with an inner embedding groove which is matched with the shape of the head of the slide rod and in which the head of the slide rod can be embedded.
7. The plastic bottle blank mold with the split-type mold core as claimed in claim 6, wherein a compression spring is disposed in the through hole of the rear core body.
8. The plastic bottle preform mold with the split mold core as claimed in claim 1, wherein the front core and the rear core are provided with a cool air circulation passage communicating with the rear mold frame and the rear mold fixing plate.
9. The plastic bottle blank mold with the split-type mold core as claimed in claim 1, wherein a wind-top groove through which the second air passage is communicated is provided on the upper end surface of the outer edge of the groove of the rear core body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220136418.5U CN216914797U (en) | 2022-01-19 | 2022-01-19 | Plastic bottle blank mold with split type mold core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220136418.5U CN216914797U (en) | 2022-01-19 | 2022-01-19 | Plastic bottle blank mold with split type mold core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216914797U true CN216914797U (en) | 2022-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220136418.5U Active CN216914797U (en) | 2022-01-19 | 2022-01-19 | Plastic bottle blank mold with split type mold core |
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| Country | Link |
|---|---|
| CN (1) | CN216914797U (en) |
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2022
- 2022-01-19 CN CN202220136418.5U patent/CN216914797U/en active Active
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