CN213564141U

CN213564141U - Inner cut gate mould

Info

Publication number: CN213564141U
Application number: CN202022086294.8U
Authority: CN
Inventors: 盛兴才
Original assignee: Shenzhen Tianlin Precision Mould Co ltd
Current assignee: Shenzhen Tianlin Precision Mould Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-06-29
Anticipated expiration: 2030-09-21

Abstract

The utility model provides an inner cutting sprue die, which comprises a first die core, a second die core and a cutting device, wherein the first die core and the second die core are mutually attached to form a runner and a forming cavity, and the wall surface of the runner is provided with an overflow groove; the cutting device comprises a cutter, the cutter comprises a cutting part, the cutting part is provided with a flow pushing surface, and the flow pushing surface is used for pushing the material to the flow channel. The utility model provides an interior contact runner mould, when cutting off the material, the material is difficult for gushing into the shaping chamber, and the product size and the quality that mould production obtained are more stable.

Description

Inner cut gate mould

Technical Field

The utility model belongs to the technical field of the mould technique and specifically relates to an interior contact gate mould is related to.

Background

Plastic products are usually produced by injection molding, and the melted material flows into a mold core through a runner and is then cooled and formed. In order to separate a formed product from a material in a flow channel, a part of manufacturers can select to arrange a cutter in a mold, and cut the material at a sprue when the material is not completely cooled and solidified, but the material is disturbed along with the movement of the cutter, redundant material possibly flows into a forming cavity, and the excessive material easily causes unstable product size and quality.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an interior contact runner mould, when cutting off the material, the material is difficult for gushing into the shaping chamber, and the product size and the quality that mould production obtained are more stable.

According to the utility model discloses an interior key gate mould of first aspect embodiment for with the cooling shaping of fused material and obtain the product, include: a first mold core; the first mold core and the second mold core are mutually attached to form a flow channel and a forming cavity, the flow channel is communicated with the forming cavity, the flow channel can be used for the material to flow, and the wall surface of the flow channel is provided with an overflow groove; the cutting device comprises a cutter, the cutter comprises a cutting part, the cutting part is arranged at the end part of the cutter and can extend out of the communication position of the flow channel and the forming cavity to separate the flow channel from the forming cavity, and the cutting part is provided with a flow pushing surface which is used for pushing the material to the flow channel.

According to the utility model discloses interior gate mould has following beneficial effect at least: the cutting part can separate the flow channel from the forming cavity so as to separate a required product from materials in the flow channel; the cutting part is provided with a flow pushing surface, so that when the cutter extends out, the cutting part can push most of materials to one side of the flow channel; meanwhile, due to the existence of the overflow groove, the material pushed and guided by the flow pushing surface has enough space to surge or flow, and cannot be forcibly extruded into the forming cavity due to overlarge local pressure. Therefore, the material is not easy to flow into the forming cavity due to the movement of the cutter, and the product quality obtained by the mold production is stable.

According to some embodiments of the invention, the communication between the forming cavity and the flow passage is adjacent to the overflow trough.

According to some embodiments of the invention, the plug flow surface is located the cutter is kept away from one side of the forming cavity, and along the direction that the cutting portion stretches out, the thickness of the cutting portion reduces gradually.

According to some embodiments of the present invention, the cutting device further includes a driving mechanism and a first base plate, the cutter is connected to the first base plate, the driving mechanism can drive the first base plate to move, so that the cutting portion extends to the communicating portion between the runner and the forming cavity, or the cutting portion is retracted from the communicating portion between the runner and the forming cavity.

According to some embodiments of the utility model, cutting device still includes the locating part, the locating part with the cutter wears to locate in the second mould benevolence, the one end of locating part with first base plate is connected, the other end of locating part can with the cutter supports jointly and holds first mould benevolence.

According to some embodiments of the utility model, still include shedder, shedder includes second base plate and first separator assembly, first separator assembly with the second base plate is connected, actuating mechanism can drive the second base plate moves, so that first separator assembly keeps away from the one end of second base plate is passed the wall of forming cavity stretch into and in the forming cavity, and make the product breaks away from the forming cavity.

According to some embodiments of the present invention, the second substrate is located the first substrate is kept away from one side of the driving mechanism, the first substrate with a gap is provided between the second substrates, the driving mechanism can drive the first substrate to move until the first substrate and the second substrate are mutually supported, and the driving mechanism can drive the first substrate and the second substrate to move together.

According to some embodiments of the invention, the first separating assembly comprises a plurality of first supporting rods, a plurality of the first supporting rods are distributed in an array.

According to some embodiments of the utility model, the shedder still includes the second separation subassembly, the second separation subassembly with the second base plate is connected, the second separation subassembly is kept away from the one end of second base plate can be passed the wall of runner and stretch into in the runner, so that the material breaks away from the runner.

According to some embodiments of the utility model, the runner includes mainstream portion and a plurality of reposition of redundant personnel portion, and is a plurality of reposition of redundant personnel portion with mainstream portion intercommunication, reposition of redundant personnel portion is kept away from mainstream portion one end can with the shaping chamber intercommunication, the second separable set can stretch into in step reposition of redundant personnel portion with in the mainstream portion.

According to some embodiments of the present invention, the second mold core has a flow groove and a forming groove, the first mold core covers the opening side of the flow groove to form the flow channel, and the first mold core covers the opening side of the forming groove to form the forming cavity.

According to the utility model discloses a some embodiments, the overflow launder is seted up on first mould benevolence, the cutter wears to locate in the second mould benevolence, cutting portion can follow stretch out in the second mould benevolence.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

FIG. 1 is a perspective, cross-sectional view of an ingate mold in some embodiments;

FIG. 2 is an enlarged view of area A of FIG. 1;

FIG. 3 is an enlarged view of region B of FIG. 1;

FIG. 4 is a schematic view of where the flow passages communicate with the forming chamber;

FIG. 5 is a bottom view of a first mold core according to some embodiments;

FIG. 6 is a top view of a second mold insert according to some embodiments;

FIG. 7 is an enlarged view of area C of FIG. 6;

FIG. 8 is a schematic view of the first and second separator assemblies in an extended condition;

FIG. 9 is a schematic view of alternate embodiments where the flow passages communicate with the forming chamber;

reference numerals: 101-a first mold core, 102-a second mold core, 103-a cover plate, 104-a first mold plate, 105-a second mold plate, 106-a base, 107-a connecting rod, 108-a first substrate, 109-a limiting member, 110-a fixing plate, 111-a flow guide member, 201-a flow channel, 202-a forming cavity, 203-a cutter, 204-a cutting part, 205-an overflow channel, 301-a second substrate, 302-a first separation component, 303-a first support rod, 304-a support block, 401-a thrust surface, 701-a flow channel, 702-a forming channel, 703-a main flow part, 704-a flow splitting part, 801-a second support rod.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the positional descriptions, such as the directions or positional relationships indicated above, below, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the mechanism or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

In the description of the present invention, several meanings are more than one, and several meanings are more than two, if there is a description of the first and second for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1 to 4, an ingate mold in some embodiments is shown, and includes a first mold core 101, a second mold core 102, and a cutting device.

Specifically, the mold includes a cover plate 103, a first mold plate 104, a second mold plate 105, and a base 106, which are stacked in this order from top to bottom. The base 106 is used for supporting parts above the base; the cover plate 103 has a hole in the center for molten material to flow in. The first mold plate 104 is provided with a flow guide 111, the flow guide 111 is funnel-shaped, and the material fed from the center of the cover plate 103 can flow downwards through the flow guide 111.

Referring to fig. 1, 2 and 4, a first mold core 101 is embedded in a first mold plate 104, a second mold core 102 is embedded in a second mold plate 105, the first mold plate 104 is arranged above the second mold plate 105, the first mold plate 104 and the second mold plate 105 are attached to each other to form a runner 201 and a forming cavity 202, the runner 201 is communicated with the forming cavity 202, molten materials can flow in through a drainage piece 111 and flow in the runner 201, the materials enter the forming cavity 202 through the runner 201 and are cooled and formed in the forming cavity 202, and a product is formed; the wall surface of the flow channel 201 is also provided with an overflow groove 205.

The cutting device includes a cutter 203, the cutter 203 is inserted into one of the mold cores, in this embodiment, the cutter 203 is inserted into the second mold core 102, in other embodiments, the cutter 203 may also be arranged to be inserted into the first mold core 101; the cutter 203 includes a cutting portion 204, and the cutting portion 204 is provided at an end of the cutter 203, and referring to fig. 4, the cutting portion 204 can be protruded to a communication between the runner 201 and the forming chamber 202 to block the runner 201 and the forming chamber 202. The cutting portion 204 has a pushing surface 401, and the pushing surface 401 is used for pushing the material to the flow channel. The thrust surface 401 may be provided on the side of the cutter 203 remote from the forming cavity 202, and the thickness of the cutting portion 204 gradually decreases in the direction in which the cutting portion 204 protrudes. Specifically, the flow pushing surface 401 may be an inclined surface, the flow pushing surface 401 is located on the right side of the cutting blade 203, and when the cutting portion 204 blocks the runner 201 and the forming cavity 202, the cutting portion 204 needs to extend upward, and the thickness of the cutting portion 204 is gradually reduced from bottom to top, where the thickness direction of the cutting portion 204 corresponds to the left-right direction in fig. 2 and 4. The flow pushing surface 401 shown in fig. 2 and 4 is configured as an inclined surface, in other embodiments, the flow pushing surface 401 may also be configured as an arc surface, as shown in fig. 9, and the arc surface meeting the thickness setting condition of the cutting portion 204 can also push the material to flow; the bevel is machined on the cutter 203 with relatively less difficulty. The push flow surface 401 may also be provided in other more complex shapes, not to mention a possible arrangement.

The molten material enters the forming cavity 202 through the runner 201 and fills the forming cavity 202, and then when the material is still in a molten state (for example, in a pressure maintaining stage of injection molding production), the cutter 203 moves, the cutting part 204 separates the runner 201 and the forming cavity 202, the material in the runner 201 and the material in the forming cavity 202 are separated from each other, and after the materials are cooled and solidified, the product can be separated from the material in the runner 201 without additional shearing. The material is still in a molten state, the hardness is low, and the cutter 203 can cut the material easily.

The cutter 203 can drive the material near the cutting part 204 to flow when moving, and due to the arrangement of the flow pushing surface 401 of the cutting part 204, in the process that the cutting part 204 extends out (the cutting part 204 extends upwards), the cutting part 204 can push most of the material to the upper right instead of the left side where the forming cavity 202 is located, meanwhile, the wall surface of the flow channel 201 is provided with the overflow groove 205, the overflow groove 205 can provide a space for the material to flow and surge, and the material cannot be forcibly extruded into the forming cavity 202 due to the fact that the local space is too small and the pressure is too large. Therefore, the utility model provides an in-gate mould, the material is difficult for gushing into the molding cavity 202 because of the removal of cutter 203, and the product that the mould production obtained, and size and quality are more stable. In some embodiments, the overflow trough may be positioned such that the communication between the forming chamber 202 and the runner 201 is adjacent to the overflow trough 205, in which case the material pushed by the pusher surface 401 can enter the overflow trough 205 directly in a shorter path, thereby reducing unwanted turbulence and pressure fluctuations and providing a better barrier to excess material outside the forming chamber 202.

The following briefly describes how the first mold core 101 and the second mold core 102 fit together to form the runner 201 and the forming cavity 202. Referring to fig. 5 to 7, the top of the second mold core 102 is provided with a circulation groove 701 and a forming groove 702 which are communicated with each other, the first mold core 101 is provided with an overflow groove 205, and the bottom of the first mold core 101 is relatively flat except the overflow groove 205; the first mold core 101 covers the opening side of the circulation groove 701, that is, the upper side of the circulation groove 701, to form the runner 201; the first mold core 101 covers the opening side of the forming groove 702, i.e., the upper side of the forming groove 702, to form the forming cavity 202.

In other embodiments, the first mold core 101 and the second mold core 102 may be provided with circulation grooves 701, after the first mold core 101 and the second mold core 102 are attached to each other, the two circulation grooves 701 are communicated with each other to form the flow channel 201, and the overflow groove 205 is provided on a wall surface of one of the circulation grooves 701; or, the circulation groove 701 is provided on the first mold core 101, and the overflow groove 205 is provided on the second mold core 102; alternatively, the circulation groove 701 is only formed on the second mold core 102, and the overflow groove 205 is formed on the wall surface of the circulation groove 701, etc., which are not limited to a practical arrangement. The forming channel 702 is arranged in a similar manner to the flow channel 701, and a possible arrangement is not listed here. Only one of the mold cores is provided with the circulation groove 701, and the opening side of the circulation groove 701 is covered by the other mold core to form a flow passage, so that the two mold cores do not need to be provided with longer circulation grooves 701, which is beneficial to reducing the processing difficulty of the mold cores.

In some embodiments, the cutting device further comprises a driving mechanism and the first substrate 108, the cutting blade 203 is connected with the first substrate 108, and the driving mechanism can drive the first substrate 108 to move, so as to drive the cutting blade 203 to move. The driving mechanism can be an air cylinder or an oil cylinder, the mold further comprises a connecting rod 107, an end of a piston rod of the air cylinder or the oil cylinder is connected with a lower end of the connecting rod 107 (not shown in detail in the driving mechanism diagram), an upper end of the connecting rod 107 can abut against the bottom of the first substrate 108, a lower end of the cutter 203 is fixedly connected with the first substrate 108, and the air cylinder or the oil cylinder drives the connecting rod 107 to ascend and descend, so that the first substrate 108 and the cutter 203 are driven to ascend and descend. There are other possible arrangements of the components of the cutting device and the connections between the components, which are not listed here.

Referring to fig. 4, when the cutter 203 separates the forming cavity 202 from the runner 201, the top end of the cutter 203 will be abutted against the first mold insert 101, and if the driving mechanism drives the cutter 203 to continuously rise at this time, the cutter 203 or the first mold insert 101 may be damaged. Therefore, in some embodiments, the cutting device further includes a limiting member 109, the limiting member 109 and the cutting knife 203 are both disposed in the second mold core 102, one end of the limiting member 109 is connected to the first substrate 108, and the other end of the limiting member 109 and the cutting knife 203 can jointly abut against the first mold core 101.

Referring to fig. 1 and 3, specifically, the limiting member 109 is rod-shaped and is inserted into the second mold core 102, and an upper end of the limiting member 109 can abut against a lower side wall surface of the first mold core 101. The top end of the limiting member 109 is flush with the top end of the cutter 203, when the top end of the cutter 203 abuts against the first mold core 101, the limiting member 109 also abuts against the first mold core 101, and the first substrate 108, the cutter 203 and the limiting member 109 cannot move upwards continuously; under the condition of the limiting member 109, the cutter 203 is no longer prevented from moving upwards only by the mutual abutting action between the cutter 203 and the first mold core 101, the interaction force between the first mold core 101 and the cutter 203 is reduced, and the risk of damage to the cutter 203 and the first mold core 101 is reduced.

Referring to fig. 3 and 8, in some embodiments, the ingate mold further comprises a demolding device, the demolding device comprises a second substrate 301 and a first separating component 302, the first separating component 302 is connected with the second substrate 301, and the driving mechanism can drive the second substrate 301 to move (the driving mechanism for driving the cutter 203 in the cutting device is also used for driving the second substrate 301 to move), so that one end of the first separating component 302, which is far away from the second substrate 301, extends into the forming cavity 202 through the wall surface of the forming cavity 202 to eject the product out of the forming cavity 202. Both the first substrate 108 and the second substrate 301 are driven by the driving mechanism, and therefore in some embodiments, it may be configured that the first substrate 108 is disposed on a side of the second substrate 301 away from the driving mechanism, a gap is formed between the first substrate 108 and the second substrate 301, the driving mechanism can drive the first substrate 108 to move until the first substrate 108 and the second substrate 301 abut against each other, and then the driving mechanism drives the first substrate 108 and the second substrate 301 to move together.

Referring to fig. 1 and 3, the ingate mold further includes a fixing plate 110 and a supporting block 304. The first substrate 108 may be connected to the base 106 by screws, and a spacer (not shown) is disposed on the base 106 and supports the first substrate 108, and a gap is formed between the first substrate 108 and the base 106. The supporting block 304 is also installed on the base 106, and the supporting block 304 is inserted into the first substrate 108; the bottom of the fixing plate 110 and the top of the first substrate 108 are abutted against each other, i.e. the first substrate 108 supports the fixing plate 110. The first substrate 108 has a cavity in the middle thereof, the second substrate 301 is located in the cavity, and the second substrate 301 is supported by the supporting block 304.

In the initial state, there is a gap between the first substrate 108 and the second substrate 301, and there is no gap between the second substrate 301 and the fixing plate 110 (i.e. the supporting block 304 and the fixing plate 110 hold the second substrate 301 to prevent the second substrate 301 from moving in an uncontrolled state), and the distance between the first substrate 108 and the second substrate 301 is denoted as L₁. When the cutter 203 needs to cut the material, the driving mechanism drives the first substrate 108 and the fixing plate 110 to ascend together until the top end of the cutter 203 just abuts against the first mold core 101, at this stage, the second substrate 301 keeps still, and the ascending distance of the first substrate 108 is L₁After the movement of the cutter 203 is stopped, the distance between the second substrate 301 and the fixing plate 110 becomes L₁The first substrate 108 and the second substrate 301 are bonded to each other, and the first substrate 108 and the fixing plate 110 are still bonded. When the mold releasing step is subsequently performed, the first substrate 108, the second substrate 301, and the fixing plate 110 are kept relatively stationary and are lifted together.

After the material is cooled and the product is formed, opening the mold to take out the product; the specific steps are that the cover plate 103 and the first template 104 are taken away, so that the upper part of the second die core 102 is not blocked, then the driving mechanism drives the first separating component 302 to move, the end part of the first separating component 302 extends into the forming cavity 202 from bottom to top, and the product in the forming cavity 202 is ejected out of the forming cavity 202. It should be noted that the product and the material in the runner 201 are separated by the cutter 203, and the product is ejected without being blocked by the residual material in the runner 201.

In some embodiments, the first separating element 302 may be configured to include a plurality of first supporting rods 303, and the plurality of first supporting rods 303 are distributed in an array. Referring to fig. 8, the plurality of first supporting rods 303 are arranged in a rectangular grid shape. The arrangement is beneficial to enabling the stress of the product to be uniform when the product is ejected out, reducing the resistance borne by the product when the product is ejected out and reducing the risk of damage.

In some embodiments, the demolding device may also be used to eject the cooled and solidified material in the runner 201; specifically, the demolding device further includes a second separation element, the second separation element is also connected to the second substrate 301, and one end of the second separation element, which is far away from the second substrate 301, can penetrate through the wall surface of the flow channel 201 and extend into the flow channel 201, so as to eject the material in the flow channel 201. Referring to fig. 7 and 8, the flow channel 201 includes a main flow portion 703 and a plurality of flow dividing portions 704, the plurality of flow dividing portions 704 are all communicated with the main flow portion 703, one end of the flow dividing portion 704, which is far away from the main flow portion 703, is communicated with the forming groove 702, the second separating assembly includes a plurality of second supporting rods 801, each flow dividing portion 704 corresponds to one second supporting rod 801, the main flow portion 703 corresponds to three second supporting rods 801, and the end portions of the second supporting rods 801 can extend into the flow channel 201; all the second supporting rods 801 synchronously extend out to eject the materials in the flow dividing part 704 and the main flow part 703 together. The simultaneous protrusion of the second separating element into the flow dividing portion 704 and the main flow portion 703 is also provided to reduce the resistance of the ejected material.

It should be noted that, in order to make the first abutting rod 303 and the second abutting rod 801 extend out, corresponding through holes are opened on the wall surfaces of the forming cavity 202 and the flow channel 201, and during the injection molding process, the end portions of the first abutting rod 303 and the second abutting rod 801 need to be located in the through holes on the wall surfaces of the forming cavity 202 or the flow channel 201 to seal the through holes so as to prevent the leakage of the material.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims

1. An ingate mold for cooling and shaping a molten material and obtaining a product, comprising:

a first mold core;

the first mold core and the second mold core are mutually attached to form a flow channel and a forming cavity, the flow channel is communicated with the forming cavity, the flow channel can be used for the material to flow, and the wall surface of the flow channel is provided with an overflow groove;

the cutting device comprises a cutter, the cutter comprises a cutting part, the cutting part is arranged at the end part of the cutter and can extend out of the communication position of the flow channel and the forming cavity to separate the flow channel from the forming cavity, and the cutting part is provided with a flow pushing surface which is used for pushing the material to the flow channel.

2. The ingate mold of claim 1, wherein a communication between the forming cavity and the runner is adjacent to the overflow trough.

3. An ingate die according to claim 1, wherein the thrust surface is located on a side of the cutter away from the forming cavity, and a thickness of the cutting portion is gradually reduced in a direction in which the cutting portion protrudes.

4. The ingate mold according to any one of claims 1 to 3, wherein the cutting device further comprises a driving mechanism and a first base plate, the cutting knife is connected with the first base plate, and the driving mechanism can drive the first base plate to move so as to extend the cutting portion to the communication between the runner and the forming cavity or retract the cutting portion from the communication between the runner and the forming cavity.

5. The mold according to claim 4, wherein the cutting device further comprises a limiting member, the limiting member and the cutting knife are inserted into the second mold core, one end of the limiting member is connected to the first base plate, and the other end of the limiting member and the cutting knife can jointly abut against the first mold core.

6. The ingate mold according to claim 4, further comprising a demolding device, wherein the demolding device comprises a second base plate and a first separating member, the first separating member is connected with the second base plate, and the driving mechanism can drive the second base plate to move, so that one end of the first separating member, which is far away from the second base plate, penetrates through the wall surface of the forming cavity and extends into the forming cavity, and the product is separated from the forming cavity.

7. The in-gate mold according to claim 6, wherein the second base plate is located on a side of the first base plate away from the driving mechanism, a gap is formed between the first base plate and the second base plate, the driving mechanism can drive the first base plate to move until the first base plate and the second base plate abut against each other, and the driving mechanism can drive the first base plate and the second base plate to move together.

8. The ingate mold according to claim 6, wherein the first separating member comprises a plurality of first retaining bars distributed in an array.

9. The ingate mold of claim 6, wherein the demolding device further comprises a second separating element connected to the second base plate, and an end of the second separating element away from the second base plate can penetrate through a wall surface of the runner and extend into the runner to separate the material from the runner.

10. The ingate mold according to claim 9, wherein the runner includes a main flow portion and a plurality of flow dividing portions, the plurality of flow dividing portions communicating with the main flow portion, an end of the flow dividing portion remote from the main flow portion being communicable with the forming cavity, the second separation member being communicable into the flow dividing portion and the main flow portion simultaneously.