CN105818334A - Cold runner die for automobile plastic parts - Google Patents
Cold runner die for automobile plastic parts Download PDFInfo
- Publication number
- CN105818334A CN105818334A CN201610251310.XA CN201610251310A CN105818334A CN 105818334 A CN105818334 A CN 105818334A CN 201610251310 A CN201610251310 A CN 201610251310A CN 105818334 A CN105818334 A CN 105818334A
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- CN
- China
- Prior art keywords
- runner
- die
- die cavity
- sub
- plastic parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920003023 plastic Polymers 0.000 title claims abstract description 23
- 239000004033 plastic Substances 0.000 title claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 20
- 238000007711 solidification Methods 0.000 claims description 19
- 230000008023 solidification Effects 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 17
- 238000009413 insulation Methods 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000000977 initiatory effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 16
- 238000002955 isolation Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000013007 heat curing Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2756—Cold runner channels
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7312—Construction of heating or cooling fluid flow channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means therefor
- B29C2045/2743—Electrical heating element constructions
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a cold runner die for automobile plastic parts. Because a heat isolation assembly used for suppressing heat conduction of a heating component towards a runner and a sub-runner is arranged in a die body, temperatures in the runner and the sub-runner can be easily kept below a curing temperature of a thermosetting material, thus fluids in the runner and the sub-runner are difficult to cure. Therefore, the fluids are difficult to cure in the sub-runner and the runner in the cold runner die for the automobile plastic parts, which is disclosed by the invention, and then raw material waste is reduced; and moreover, because the fluids are difficult to cure in the sub-runner and the runner, a flow resistance is low, the fluids can easily enter die cavities, and then the yield of products can be increased.
Description
Technical field
The present invention relates to mould applications, in particular it relates to the cold runner die of a kind of injection molding thermoset engineering material.
Background technology
Due to thermosetting engineering material have heat-resisting, wear-resisting, high voltage withstanding, mechanical strength is high and the feature such as good stability of the dimension, therefore application is extensive.Including household electrical appliances, do work and industrial equipment, automobile and other industries.Existing thermosetting plastics is injection mo(u)lding in hot runner mould, as shown in Figure 1, this hot runner mould generally includes the hot flow path that initiating terminal is injection port, for by the sub-runner of the divided fluid stream in hot flow path to each die cavity and the die cavity of corresponding product shape, owing to the temperature in hot flow path and sub-runner is higher, simultaneously can branch to multiple die cavity to be molded liquid in meeting an injection port, the generally entire length of runner is longer, thus cause fluid in hot flow path with sub-runner by heat cure, cause wastage of material serious in being attached to runner, and it is difficult to clear up；Simultaneously because sub-runner is longer, cause fluid flow resistance in runner and sub-runner big, it is difficult to make fluid be full of die cavity, in turn result in the formed product produced the fullest, occur lacking material, having pore and the technical problem of quality instability, so that shaped article fraction defective is higher in this kind of hot runner mould, and quality is unstable.
Summary of the invention
To be solved by this invention be existing thermosetting engineering material mould for hot runner mould, fluid flows wherein and the most not yet enters die cavity just by heat cure, and then cause the technical problem that fluid flow resistance is big, wastage of material serious, shaped article quality is unstable, thus provide the cold runner die of a kind of automobile plastic parts that a kind of thermosetting engineering material molding fluid flow resistance is little, wastage of material is few, the full intact material of the product of molding, yields are high.
To achieve these goals, the present invention provides the cold runner die of a kind of automobile plastic parts, including: mold；Runner, is extended downwards by the upper surface of described mold, and the initiating terminal of described runner forms injection port；Die cavity, is formed in described mold, and it is used for forming product profile；Sub-runner, is used for connecting described runner and each described die cavity, the fluid in described runner is directed respectively into each die cavity；Heating assembly, neighbouring described die cavity, for making the temperature in described die cavity be kept above the solidification temperature of thermosets；Also include suppressing described heater block to runner and the insulating assembly of sub-runner conduction of heat.
Described insulating assembly is arranged between described runner and the communicating position of sub-runner and described die cavity.
Described insulating assembly is thermal insulation board.
It is cold runner that described runner and described sub-runner are positioned at the part of described insulating assembly die cavity side dorsad, and described cold runner keeps below the solidification temperature of described thermosets for the fluid temperature (F.T.) that will be located in cold runner.
Also including cooling assembly, this cooling assembly is arranged adjacent to described cold runner, for lowering the temperature the fluid in described cold runner.
Described cooling assembly is the cold water pipes being arranged in described mold.
Described sub-runner includes being arranged on described insulating assembly the most described die cavity side and extends to the horizontal component of position directly above of each described die cavity, and the vertical component extended to downward vertically in described die cavity connected with described horizontal component.
Described insulating assembly also include being positioned at outside described vertical component for the insulation by described heating assembly with the isolation of described vertical component.
Described heating assembly is the electrothermal heating tube being arranged in described mold.
The described insulating assembly side towards described die cavity is located at by described heating assembly.
The technique scheme of the present invention has the advantage that compared to existing technology
(1) cold runner die of a kind of automobile plastic parts of the present invention, owing to being provided with the described heater block of suppression in mold to described runner and the insulating assembly of described sub-runner conduction of heat, therefore the temperature in runner with sub-runner is easily maintained at below thermosets solidification temperature, so that runner is not easy solidification with the fluid in sub-runner, therefore, the cold runner die of a kind of automobile plastic parts of the present invention is difficult to make fluid solidify in sub-runner and runner, decreases wastage of material；And owing to fluid is difficult to solidification in runner with sub-runner, hence in so that flow resistance is little, fluid is easily accessible die cavity, it is possible to increase the yields of product.
(2) cold runner die of a kind of automobile plastic parts of the present invention, described insulating assembly is arranged between described sub-runner and the communicating position of runner and described die cavity, so can effectively suppress the conduction of heat heating the assembly runner to insulating assembly die cavity side dorsad with sub-runner, so that the runner of described insulating assembly die cavity side dorsad is maintained at below the solidification temperature of thermosets (40 DEG C～90 DEG C) with the temperature of fluid in sub-runner, thus fluid therein is difficult to solidification, decreases wastage of material.
(3) cold runner die of a kind of automobile plastic parts of the present invention, it is cold runner that described runner and described sub-runner are positioned at the part above described insulating assembly, described cold runner keeps below the solidification temperature (40 DEG C～90 DEG C) of described thermosets for the fluid temperature (F.T.) that will be located in cold runner, also include that neighbouring described cold runner is arranged, for the cooling assembly that the fluid in described cold runner is lowered the temperature, the setting of cooling assembly further ensures runner and the control of temperature in sub-runner, staff can be by cooling assembly regulation runner and the temperature in sub-runner, so that fluid therein is in the temperature range of good fluidity, contribute to fluid and enter die cavity smoothly, improve production efficiency and yields.
Accompanying drawing explanation
In order to make present disclosure be more likely to be clearly understood, below in conjunction with the accompanying drawings, the present invention is further detailed explanation, wherein,
Fig. 1 is the generalized section of the mould of existing thermosetting engineering material in background technology；
Fig. 2 is the generalized section of the cold runner die of the present invention a kind of automobile plastic parts.
Description of reference numerals
1-mold；2-runner；3-die cavity；4-sub-runner；5-heats assembly；6-insulating assembly；7-communicating position；8-cooling assembly；9-horizontal component；10-vertical component.
Detailed description of the invention
Below with reference to accompanying drawing, the cold runner die of a kind of automobile plastic parts of the present invention is described in detail.
See Fig. 2, in the present embodiment, the cold runner die of a kind of automobile plastic parts, including: mold 1；Runner 2, is extended downwards by the upper surface of described mold 1, and the initiating terminal of described runner 2 forms injection port；Die cavity 3, is formed in described mold 1, and it is for forming the profile of product；Sub-runner 4, is used for connecting described runner 2 and each described die cavity 3, the fluid in described runner 2 is directed respectively into each die cavity 3；Heating assembly 5, neighbouring described die cavity 3, for making the temperature in described die cavity 3 be kept above the solidification temperature of thermosets；Also include suppressing described heater block 5 to runner 2 and the insulating assembly 6 of sub-runner 4 conduction of heat.
The setting of insulating assembly 6 makes to heat assembly 5 and is not easy the heat effect of die cavity to transmit in described runner 2 with sub-runner 4, so that runner 2 can be maintained at below thermosets solidification temperature (40 DEG C～90 DEG C) with the temperature in sub-runner 4, so that fluid is difficult to solidify in sub-runner 4 with runner 2, therefore decrease wastage of material；And owing to fluid is difficult to solidification in runner 2 with sub-runner 4, so that flow resistance is little, blocking is less likely to occur, therefore fluid is easily accessible die cavity 3, it is possible to increase the yields of product.
In the present embodiment, described insulating assembly 6 is arranged between described runner 2 and the communicating position 7 of sub-runner 4 and described die cavity 3.The fluid of the runner 2 and sub-runner 4 that are positioned at insulating assembly 6 die cavity 3 one side position dorsad is susceptible to heat cure, and be positioned at the insulating assembly 6 fluid towards the sub-runner 4 of die cavity 3 one side position and be easily rapidly achieved solidification temperature in the preheating entrance die cavity 3 of heating assembly 5, therefore, so setting is favorably improved production efficiency.
It should be noted that, the concrete structure of described insulating assembly 6 is diversified, as long as ensure that and being difficult between runner 2 and sub-runner 4 and die cavity 3 carry out conduction of heat, in the present embodiment, for the ease of installing, described insulating assembly 6 is thermal insulation board, and described thermal insulation board is that the mode of interlayer is arranged in described mold 1, on it, corresponding sub-runner 4 offers through hole, so that the fluid in sub-runner passes through.
In the present embodiment, the part that described runner 2 and described sub-runner 4 are positioned at described insulating assembly 6 die cavity 3 side dorsad is cold runner, and described cold runner keeps below the solidification temperature (40 DEG C～90 DEG C) of described thermosets for the fluid temperature (F.T.) that will be located in cold runner.In keeping cold runner, fluid temperature (F.T.) is a lot of less than the means of thermosets temperature, such as by arranging the heat transfer of above-mentioned thermal insulation board suppression heating assembly 5.
In the present embodiment, in order to improve the stability of temperature in cold runner further, also include cooling assembly 8, this cooling assembly 8 is arranged adjacent to described cold runner, for the fluid in described cold runner is lowered the temperature, cooling assembly 8 is arranged due to neighbouring cold runner, therefore easily and carries out heat exchange between cold runner, makes the temperature in described cold runner be maintained at below the solidification temperature of thermosets (40 DEG C～90 DEG C).The setting of cooling assembly 8 further ensures runner 2 and the control of temperature in sub-runner 4, staff can regulate runner 2 and the temperature in sub-runner 4 by cooling assembly 8, so that fluid therein is in the temperature range of good fluidity, contribute to fluid and enter die cavity 3 smoothly, improve production efficiency and yields.
It will be appreciated that, the part of insulating assembly 6 die cavity 3 side dorsad is set to the mode of cold runner be not limited only to above-mentioned neighbouring cold runner position and arrange this kind of mode of cooling assembly 8, for example, it is also possible to by arranging, near the cold runner of die cavity 3 side dorsad, the louvre easily making heat shed；Or the mode of the heat conduction pin outside mold is extended in setting near cold runner, aforesaid way is all so that the part of insulating assembly 6 die cavity 3 side dorsad becomes cold runner.
Further, described cooling assembly 8 is the cold water pipes being arranged in described mold 1.
Below in conjunction with Fig. 2, describe the set-up mode of runner 2 and sub-runner 4 in detail, in the present embodiment, described sub-runner 4 includes being arranged on described insulating assembly 6 die cavity 3 side dorsad and extends to the horizontal component 9 of position directly above of each described die cavity 3, and the vertical component 10 extended to downward vertically in described die cavity 3 connected with described horizontal component 9.Owing to sub-runner 4 includes horizontal component 9 and vertical component 10, horizontal component 9 is arranged on insulating assembly 6 die cavity 3 side dorsad, and temperature the most therebetween is relatively low, and fluid is difficult to solidification in described horizontal component 9, so that fluid flowing is smooth and easy；Owing to vertical component 10 is through described insulating assembly 6, in vertical component 10, the flowing of fluid is the most smooth under gravity, it is not easy to blocks betwixt and effectively avoids fluid blockage and wastage of material.
Further, described insulating assembly 6 also include being positioned at outside described vertical component 10 for the insulation that described heating assembly 5 is isolated with described vertical component 10, the insulation arranged outside vertical component 10 can effectively suppress heat to conduct in described vertical component 10, fluid temperature (F.T.) therebetween is made to be maintained at below the solidification temperature of thermosets the most further, so that fluid is not easy solidification, further avoid fluid blockage and wastage of material.
It will be appreciated that, the suppression heating assembly 5 mode to described vertical component 10 conduction of heat, it is not limited only to outside vertical component 10 arrange insulation one mode, and the set-up mode of described insulation is also diversified, surrounds described vertical component 10 the most in a tubular form and arrange or plate-shaped set-up mode be set etc. at vertical component 10 both sides lattice gear；Simultaneously insulation can be one-body molded with insulating assembly 6 can also be to be respectively provided with；Although not going out in the accompanying drawings, but those skilled in the art can be understood by following description, and specifically, insulation is arranged on around vertical component 10, is used for suppressing to heat assembly 5 to vertical component 10 conduction of heat.
In the present embodiment, described heating assembly 5 is the electrothermal heating tube being arranged in described mold 1.It is fast that electrothermal heating tube has firing rate, the advantage of temperature-controllable.
In the present embodiment, the described insulating assembly 6 side towards described die cavity 3 is located at by described heating assembly 5, so arranges and is advantageous in that, insulating assembly 6 can preferably suppress the conduction of heat heating assembly 5 to runner 2 with sub-runner 4.
Obviously, above-described embodiment is only for clearly demonstrating example, the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or variation still in the protection domain of the invention among.
Claims (10)
1. a cold runner die for automobile plastic parts, including:
Mold (1)；
Runner (2), is extended downwards by the upper surface of described mold (1), and the initiating terminal of described runner (2) forms injection port；
Die cavity (3), is formed in described mold (1), and it is used for formed product；
Sub-runner (4), is used for connecting described runner (2) and each described die cavity (3), the fluid in described runner (2) is directed respectively into each die cavity (3)；
Heating assembly (5), neighbouring described die cavity (3), it is used for making the temperature in described die cavity (3) keep the solidification temperature needed for thermosets；
It is characterized in that, also include suppressing the described heater block (5) insulating assembly (6) to runner (2) and sub-runner (4) conduction of heat.
The cold runner die of a kind of automobile plastic parts the most according to claim 1, it is characterized in that, described insulating assembly (6) is positioned between the communicating position (7) of described runner (2) and sub-runner (3) and described die cavity (3) setting.
The cold runner die of a kind of automobile plastic parts the most according to claim 2, it is characterised in that described insulating assembly (6) is thermal insulation board.
4. according to the cold runner die of a kind of automobile plastic parts according to any one of claim 1-3, it is characterized in that, it is cold runner that described runner (2) and described sub-runner (4) are positioned at the part of described insulating assembly (6) die cavity dorsad (3) side, and described cold runner keeps below the solidification temperature of described thermosets for the fluid temperature (F.T.) that will be located in cold runner.
The cold runner die of a kind of automobile plastic parts the most according to claim 4, it is characterised in that also include cooling assembly (8), the neighbouring described cold runner of this cooling assembly (8) is arranged, for lowering the temperature the fluid in described cold runner.
The cold runner die of a kind of automobile plastic parts the most according to claim 5, it is characterised in that described cooling assembly (8) is for be arranged on the cold water pipes in described mold (1).
The cold runner die of a kind of automobile plastic parts the most according to claim 1 and 2, it is characterized in that, described sub-runner (4) includes being arranged on described insulating assembly (6) the most described die cavity (3) side and extends to the horizontal component (9) of position directly above of each described die cavity (3), and the vertical component (10) extended to downward vertically in described die cavity (3) connected with described horizontal component (9).
The cold runner die of a kind of automobile plastic parts the most according to claim 7, it is characterized in that, described insulating assembly (6) also includes the insulation being used for isolating described heating assembly (5) and described vertical component (10) being positioned at described vertical component (10) outside.
The cold runner die of a kind of automobile plastic parts the most according to claim 1 and 2, it is characterised in that described heating assembly (5) is for be arranged on the electrothermal heating tube in described mold (1).
The cold runner die of a kind of automobile plastic parts the most according to claim 1 and 2, it is characterised in that described heating assembly (5) is located at the described insulating assembly (6) side towards described die cavity (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610251310.XA CN105818334A (en) | 2016-04-22 | 2016-04-22 | Cold runner die for automobile plastic parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610251310.XA CN105818334A (en) | 2016-04-22 | 2016-04-22 | Cold runner die for automobile plastic parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105818334A true CN105818334A (en) | 2016-08-03 |
Family
ID=56527221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610251310.XA Pending CN105818334A (en) | 2016-04-22 | 2016-04-22 | Cold runner die for automobile plastic parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105818334A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106182627A (en) * | 2016-08-30 | 2016-12-07 | 健大电业制品（昆山）有限公司 | A kind of bakelite material cold runner system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203567074U (en) * | 2013-11-01 | 2014-04-30 | 杭州兴达特种橡胶有限公司 | Cold runner mold |
| CN204019863U (en) * | 2014-06-23 | 2014-12-17 | 深圳市凯中精密技术股份有限公司 | A kind of cold runner die for the moulding of thermosetting engineering material |
-
2016
- 2016-04-22 CN CN201610251310.XA patent/CN105818334A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203567074U (en) * | 2013-11-01 | 2014-04-30 | 杭州兴达特种橡胶有限公司 | Cold runner mold |
| CN204019863U (en) * | 2014-06-23 | 2014-12-17 | 深圳市凯中精密技术股份有限公司 | A kind of cold runner die for the moulding of thermosetting engineering material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106182627A (en) * | 2016-08-30 | 2016-12-07 | 健大电业制品（昆山）有限公司 | A kind of bakelite material cold runner system |
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Application publication date: 20160803 |