CN114055720B - An injection mold for manufacturing a product with a tubular body component - Google Patents
An injection mold for manufacturing a product with a tubular body componentInfo
- Publication number
- CN114055720B CN114055720B CN202111352670.6A CN202111352670A CN114055720B CN 114055720 B CN114055720 B CN 114055720B CN 202111352670 A CN202111352670 A CN 202111352670A CN 114055720 B CN114055720 B CN 114055720B
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- CN
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- Prior art keywords
- cutter
- tubular
- product
- core
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B29C45/38—Cutting-off equipment for sprues or ingates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
- B29C45/401—Ejector pin constructions or mountings
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
本发明涉及一种用于制造具有管体部件产品的注塑模具，从上之下依次包括上面板、前模板、后模板和下面板；所述前模板与后模板对应配合；还具有水口切刀装置和拉针；前模板上固定设有母模仁；后模板上设有公模仁；上面板上固定设有浇口套；母模仁上固定设有导套；水口切刀装置包括管状切刀；拉针滑动设置在管状切刀内，拉针的上端为拉料部；管状切刀依次穿过后模板和公模仁，并正对导套；管状切刀的上端为切刀部；合模后，导套的下端面、管状切刀伸出公模仁的部分以及两者对应母模仁的部分形成具有管体部件产品上管体的成形腔。本发明让作为水口切刀的管状切刀参与成形的同时，还能够进行水口切除，改变了传统进料方式，有效避免了产品熔接痕问题。
The present invention relates to an injection mold for manufacturing a product having a tubular body component, which comprises, from top to bottom, an upper panel, a front template, a rear template, and a lower panel; the front template corresponds to the rear template; the mold further comprises a sprue cutter device and a pull pin; a female mold core is fixedly provided on the front template; a male mold core is provided on the rear template; a sprue sleeve is fixedly provided on the upper panel; a guide sleeve is fixedly provided on the female mold core; the sprue cutter device comprises a tubular cutter; the pull pin is slidably arranged in the tubular cutter, the upper end of the pull pin being a material pulling portion; the tubular cutter passes through the rear template and the male mold core in sequence and faces the guide sleeve; the upper end of the tubular cutter is a cutting portion; after the mold is closed, the lower end surface of the guide sleeve, the portion of the tubular cutter extending from the male mold core, and the portions of the two corresponding to the female mold core form a forming cavity having the upper tubular body of the tubular body component product. The present invention allows the tubular cutter, which acts as a sprue cutter, to participate in forming while also performing sprue removal, thereby changing the traditional feeding method and effectively avoiding the problem of product weld marks.
Description
Technical Field
The invention relates to the field of injection molding, in particular to an injection mold for manufacturing a product with a pipe body part.
Background
The injection mold is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and precise dimensions. Injection molding is a process used in mass production of parts of complex shape. Specifically, the heated and melted plastic is injected into a die cavity by an injection molding machine under high pressure, and is cooled and solidified to obtain a formed product
In injection molding, the submarine glue feeding and the hot runner glue feeding are adopted, glue collecting positions exist in the glue feeding of the small water gap, and welding marks are generally generated in the glue collecting positions. The weld marks are formed by the fact that a plurality of streams of materials are split and combined in a die in injection or extrusion, the molten materials are not completely fused at an interface and cannot be fused into a whole, and therefore the weld marks are formed, and the appearance quality and the mechanical property of a plastic part are affected. Meanwhile, the nozzle cutters of injection molds adopting the nozzle cutter devices are complex in design, single in function and to be improved.
Disclosure of Invention
The first object of the invention is to provide an injection mold for manufacturing a product with a pipe body part, which can cut a water gap while a tubular cutter serving as a water gap cutter participates in forming, so that the traditional feeding mode is changed, and the problem of weld marks of the product is effectively avoided.
The technical scheme includes that the front template is correspondingly matched with the rear template, a water gap cutter device and a pull pin are arranged at the same time, a female die core is fixedly arranged on the front template, a male die core is arranged on the rear template, a sprue bush is fixedly arranged on the upper panel, a guide sleeve for inserting the sprue bush is fixedly arranged on the female die core, the water gap cutter device comprises a tubular cutter for cutting a water gap under the drive of a cutter driving device, the pull pin is slidably arranged in the tubular cutter, the upper end of the pull pin is a pulling part, the tubular cutter sequentially penetrates through the rear template and the male die core and is opposite to the guide sleeve, the tubular cutter is slidably matched with the rear template and the male die core, the upper end of the tubular cutter is a cutter part, and after the die is matched, the lower end face of the guide sleeve, the part of the tubular cutter extending out of the male die core and the part of the tubular cutter corresponding to the female die core form a forming cavity with an upper pipe body of a pipe body component product.
The movable insert mechanism comprises two insert assemblies which are symmetrically arranged, the insert assemblies comprise inserts, inclined rods and driving blocks, the inserts are arranged on the female die core in a sliding mode, one ends of the inserts, which extend into the female die core, are formed into forming parts, inclined holes matched with the inclined rods are formed in the other ends of the inserts, the inclined rods are arranged on the driving blocks, the driving blocks are fixedly arranged on the upper panel, a first spring assembly used for driving the upper panel to be separated from the front template is arranged on the front template, and after die assembly, forming cavities with pipe bodies of pipe body component products are formed by the forming parts of the inserts, the lower end faces of the guide sleeves and the parts of the tubular cutters, which extend out of the male die core.
The back template is provided with a core pulling mechanism, and the core pulling mechanism comprises a mandrel which participates in forming under the driving of a core pulling driving device.
The material pulling part of the pull needle is a block body with an inclined surface, the inclined surface extends outwards from top to bottom and is inclined, and the material pulling part is positioned in the tubular cutter and forms a filling cavity with the tubular cutter.
The diameter of the part of the tubular cutter extending out of the male die core gradually increases from top to bottom.
The ejector pin assembly comprises an ejector pin plate and a plurality of ejector pins, a plurality of return rods are fixedly arranged on the lower end face of the rear template, a second return spring is sleeved on the return rods, the ejector pin plate is arranged on the return rods in a sliding mode, two ends of the second return spring respectively act on the lower end face of the rear template and the upper end face of the ejector pin plate, through holes for an ejector rod of an injection molding machine to pass through are formed in the lower panel, the ejector pins are fixedly arranged on the ejector pin plate, and each ejector pin acts on the inner wall and/or a connecting hole and/or a reinforcing rib of a product with a pipe body part.
The surface roughness of the tubular cutter is less than or equal to Ra0.4.
The cutter driving device comprises a cutter seat and a high-pressure micro-motion oil cylinder, wherein the lower end of the tubular cutter extends out of the rear template and is fixedly connected with the cutter seat, the lower end of the pull needle extends out of the lower end of the tubular cutter and penetrates through the cutter seat and is fixedly connected to the thimble plate, the core pulling driving device is an air cylinder, and the telescopic part of the air cylinder is fixedly connected with the mandrel.
The invention has the advantages that (1) the tubular cutter participates in forming, and simultaneously can cut off the water gap, thereby changing the traditional feeding mode, and the problem of glue collecting is avoided, so that the problem of weld marks of products is effectively avoided.
(2) The invention can adapt to the forming requirements of some pipe bodies by the movable insert mechanism, and is convenient for forming and demolding, such as forming of a water inlet pipe in a water pump housing.
(3) The invention can further enable the die to be suitable for more forming demands through the core pulling mechanism.
(4) The matching design of the material pulling part and the tubular cutter is very ingenious, the tubular cutter is provided with favorable conditions for participating in forming, meanwhile, the block body serving as the material pulling part is simple in design structure, but the inclined plane design of the material pulling part enables the material pulling effect to be better, and the material taking off is more convenient.
(5) The design of the thimble assembly in the invention can lead the appearance surface of the product with the pipe body part to be more beautiful.
(6) The surface roughness of the tubular cutters in the present invention further affects the stripping effect.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a schematic view of the female mold insert, male mold insert, nozzle cutter assembly, pull pin, movable insert mechanism and ejector pin assembly of the present invention;
FIG. 4 is a cross-sectional view of FIG. 3;
FIG. 5 is a schematic view of a movable insert assembly according to the present invention;
FIG. 6 is a schematic diagram showing the cooperation of the material pulling part of the pull needle and the cutter part of the tubular cutter;
FIG. 7 is a schematic diagram of a female mold insert according to the present invention;
FIG. 8 is a schematic view of the assembly of the core insert, core pulling mechanism, nozzle cutter device, pull pin and thimble assembly of the present invention.
Detailed Description
Referring to fig. 1 to 8, the invention sequentially comprises an upper panel 1, a front template 2, a rear template 3 and a lower panel 4 from top to bottom, wherein the front template 2 is correspondingly matched with the rear template 3, and simultaneously is provided with a water gap cutter device, a pull needle 6, a movable insert mechanism, a core pulling mechanism and a thimble assembly 9, a female mold insert 21 is fixedly arranged on the front template 2, a male mold insert 31 is arranged on the rear template 3, a sprue bush 11 is fixedly arranged on the upper panel 1, a guide sleeve 211 for inserting the sprue bush 11 is fixedly arranged on the female mold insert 21, the water gap cutter device comprises a tubular cutter 5 for water gap cutting under the drive of a cutter driving device, the pull needle 6 is slidably arranged in the tubular cutter 5, the upper end of the pull needle 6 is provided with a material pulling part 61, the tubular cutter 5 sequentially passes through the rear template 3 and the male mold insert 31 and faces the guide sleeve 211, the tubular cutter 5 is slidably matched with the rear template 3 and the male mold insert 31, and the upper end of the tubular cutter 5 is provided with a cutter part 51.
The movable insert mechanism comprises two insert assemblies 7 which are symmetrically arranged, each insert assembly 7 comprises an insert 71, an inclined rod 72 and a driving block 73, the insert 71 is arranged on the female die core 21 in a sliding mode, one end of the insert extending into the female die core 21 is a forming part 711, the other end of the insert is provided with an inclined hole 712 matched with the inclined rod 72, the inclined rod 72 is arranged on the driving block 73, the driving block 73 is fixedly arranged on the upper panel 1, a first spring group used for driving the upper panel 1 to be separated from the front panel 2 is arranged on the front panel 2, and after the mold is closed, the forming part 711 of the insert 71, the lower end face of the guide sleeve 211 and the part of the tubular cutter 5 extending out of the male die core 31 form a forming cavity with an upper pipe body of a pipe body component product.
The driving block 73 is provided with a locking guide inclined plane 731, the insert 71 is provided with a matching inclined plane 713 which is matched with the locking guide inclined plane 731 and is used for promoting the insert 71 to slide inwards, and the locking guide inclined plane 731 further promotes the forming parts of the two inserts 71 to move towards each other and participate in forming during die assembly.
The back template 3 is provided with a core pulling mechanism, the core pulling mechanism comprises a mandrel 8 which participates in forming under the driving of a core pulling driving device, the core pulling driving device is an air cylinder, and the telescopic part of the air cylinder is fixedly connected with the mandrel 8.
The material pulling part 61 of the pull needle 6 is a block body with an inclined surface, the inclined surface extends outwards from top to bottom, and the material pulling part 61 is positioned in the tubular cutter 5 and forms a filling cavity with the tubular cutter 5.
The diameter of the portion of the tubular cutter 5 extending out of the male die core 31 gradually increases from top to bottom. The design can be easier in demolding.
The ejector pin assembly 9 comprises an ejector pin plate 91 and a plurality of ejector pins 92, a plurality of return rods are fixedly arranged on the lower end face of the rear template 3, a second return spring is sleeved on the return rods, the ejector pin plate 91 is arranged on the return rods in a sliding mode, two ends of the second return spring respectively act on the lower end face of the rear template 3 and the upper end face of the ejector pin plate 91, through holes for an ejector pin of an injection molding machine to pass through are formed in the lower panel 4, the ejector pin of the injection molding machine passes through the through holes of the lower panel 4 and then acts on the ejector pin plate 91, the ejector pins 92 are fixedly arranged on the ejector pin plate 91, and each ejector pin 92 acts on the inner wall and/or a connecting hole and/or a reinforcing rib of a product with a pipe body part. The ejector pin of the injection molding machine is matched with the driving cylinder, and is driven by the driving cylinder to act on the ejector pin 91, so that the ejector pin 92 is promoted to eject materials.
The surface roughness of the tubular cutter 5 is equal to or less than Ra0.4.
The cutter driving device comprises a cutter seat and a high-pressure micro-motion oil cylinder, the lower end of a tubular cutter 5 extends out of the rear template 3 and is fixedly connected with the cutter seat, through holes through which a driving shaft of the high-pressure micro-motion oil cylinder can pass are formed in the lower panel 4 and the ejector plate 91, the driving shaft of the high-pressure micro-motion oil cylinder sequentially passes through the lower panel 4 and the ejector plate 91 and is fixedly connected with the cutter seat, the lower end of a pull needle 6 extends out of the lower end of the tubular cutter 5 and passes through the cutter seat and is fixedly connected with the ejector plate 91, the core pulling driving device is an air cylinder, and a telescopic part of the air cylinder is fixedly connected with a mandrel.
Taking injection molding of the water pump housing as an example, and fig. 1 to 8 are all injection molds of the water pump housing:
The forming part 711 of the insert 71, the lower end surface of the guide sleeve 211, and the part of the tubular cutter 5 extending out of the male die core 31 form a forming cavity of a water inlet pipe (the water inlet pipe is a pipe body) of the water pump housing. The male mold insert 31 of the rear mold plate 3 cooperates with the female mold insert 21 of the front mold plate 2 to form the main body portion of the water pump housing (i.e., the portion for accommodating the impeller). And the female die core 21, the male die core 31 and the mandrel 8 are matched to form a forming cavity of the water outlet pipe of the water pump housing. Wherein, each thimble 92 of the thimble assembly 9 is in sliding fit with the rear template 3 and the male die core 31, and each thimble 92 of the thimble assembly 9 acts in a connecting hole on the inner side of the water pump housing.
The working process for preparing the water pump shell by using the injection mold is as follows:
Firstly, the two symmetrically arranged inserts 71 are clamped, and then move in opposite directions under the action of the locking guide inclined planes 731 and the inclined rods 72 of the driving blocks 73, and finally form a forming cavity of a water inlet pipe of the water pump shell together with the lower end face of the guide sleeve 211 and the part of the tubular cutter 5 extending out of the male die core 31, the sprue bush 11 is inserted into the guide sleeve 211 to prepare injection molding, and meanwhile, the mandrel 8 is attached to the male die core 31 on the rear die plate 3 under the driving of the core pulling driving device and is ready to participate in forming. While the tubular cutter 5 is driven by the cutter driving means to a predetermined position and is ready to participate in the forming. At the same time, the pull pin 6 reaches a preset position under the driving of the die assembly.
At the beginning of injection molding, molten plastic flows into the forming cavity from the sprue bush 11, and as the molten plastic flows uniformly, no glue collecting position exists, and therefore welding marks are avoided.
After the pressure maintaining is finished, the cutter part 51 of the tubular cutter 5 cuts off the water gap under the drive of the cutter driving device, the water gap material head is fixed by the pull needle 6, the mandrel 8 exits from the forming cavity under the drive of the core pulling driving device before die opening, then under the action of the first spring group, the upper panel 1 is separated from the front template 2, so that the driving block 73 is driven to move upwards, the two symmetrically arranged inserts 71 are driven to move oppositely under the action of the inclined rod 72, the water inlet pipe of the water pump housing is separated, the water gap material head is pulled by the pull needle 6 to separate from the sprue bush 11, and under the drive of the driving cylinder, the ejector rod of the injection molding machine acts on the ejector plate 91, so that the ejector plate 91 drives the ejector pin 92 and the pull needle 6 to move, so that the water gap material head is ejected from the tubular cutter 5.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (9)
1. The injection mold for manufacturing the pipe body part product comprises an upper panel, a front template, a rear template and a lower panel from top to bottom, wherein the front template is correspondingly matched with the rear template, the injection mold is characterized by further comprising a water gap cutter device and a pull needle, a female mold core is fixedly arranged on the front template, a male mold core is arranged on the rear template, a sprue bush is fixedly arranged on the upper panel, a guide sleeve for inserting the sprue bush is fixedly arranged on the female mold core, the water gap cutter device comprises a tubular cutter for cutting a water gap under the drive of a cutter driving device, the pull needle is slidably arranged in the tubular cutter, the upper end of the pull needle is a material pulling part, the tubular cutter sequentially penetrates through the rear template and the male mold core and is opposite to the guide sleeve, the tubular cutter is slidably matched with the rear template and the male mold core, the upper end of the tubular cutter is a cutter part, after the mold is matched, the lower end face of the guide sleeve, the part of the tubular cutter extends out of the male mold core and the part of the female mold core corresponds to the female mold core form a forming cavity with the pipe body part product, and the surface roughness of the tubular cutter is less than or equal to 0.4.
2. The injection mold for manufacturing a product with a pipe body part according to claim 1, further comprising a movable insert mechanism, wherein the movable insert mechanism comprises two insert assemblies which are symmetrically arranged, the insert assemblies comprise inserts, inclined rods and driving blocks, the inserts are arranged on a female mold core in a sliding mode, one ends of the inserts, which extend into the female mold core, are formed into forming parts, the other ends of the inserts are provided with inclined holes matched with the inclined rods, the inclined rods are arranged on the driving blocks, the driving blocks are fixedly arranged on an upper panel, a first spring assembly used for driving the upper panel to be separated from the front mold plate is arranged on the front mold plate, and after the mold is closed, forming parts of the inserts, the lower end faces of the guide sleeves and the parts, which extend out of the male mold core, of the tubular cutters form a forming cavity with the upper pipe body of the product with the pipe body part.
3. An injection mold for manufacturing a product having a pipe body part according to claim 1 or 2, wherein a core pulling mechanism is provided on the rear mold plate, and the core pulling mechanism includes a core shaft which participates in forming under the drive of a core pulling driving device.
4. An injection mold for manufacturing a product having a tubular body part according to claim 1 or 2, wherein the pulling portion of the pull needle is a block with a slope extending from top to bottom and inclined outward, and the pulling portion is located in the tubular cutter and forms a filling cavity with the tubular cutter.
5. An injection mold for producing a product having a tubular body part according to claim 1 or 2, wherein the diameter of the portion of the tubular cutter extending out of the male die core is gradually increased from top to bottom.
6. An injection mold for manufacturing a product having a tubular body part according to claim 3, wherein the pulling portion of the pull needle is a block with a slope extending obliquely from top to bottom and outwardly, and the pulling portion is located in the tubular cutter and forms a filling cavity with the tubular cutter.
7. An injection mold for producing a product having a tubular body part according to claim 3, wherein the diameter of the portion of the tubular cutter extending beyond the male die core is gradually increased from top to bottom.
8. An injection mold for manufacturing a product with a pipe body part according to claim 3, further comprising an ejector pin assembly, wherein the ejector pin assembly comprises an ejector pin plate and a plurality of ejector pins, a plurality of return rods are fixedly arranged on the lower end face of the rear mold plate, second return springs are sleeved on the return rods, the ejector pin plate is slidably arranged on the return rods, two ends of the second return springs respectively act on the lower end face of the rear mold plate and the upper end face of the ejector pin plate, through holes for an ejector pin of an injection molding machine to pass through are formed in the lower panel, the ejector pins are fixedly arranged on the ejector pin plate, and each ejector pin acts on the inner wall and/or a connecting hole and/or a reinforcing rib of the product with the pipe body part.
9. The injection mold for manufacturing a product with a pipe body part according to claim 8, wherein the cutter driving device comprises a cutter seat and a high-pressure micro-motion oil cylinder, the lower end of the tubular cutter extends out of the rear mold plate and is fixedly connected with the cutter seat, the lower end of the pull needle extends out of the lower end of the tubular cutter and passes through the cutter seat and is fixedly connected with the thimble plate, the core pulling driving device is an air cylinder, and the telescopic part of the air cylinder is fixedly connected with the mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111352670.6A CN114055720B (en) | 2021-11-16 | 2021-11-16 | An injection mold for manufacturing a product with a tubular body component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111352670.6A CN114055720B (en) | 2021-11-16 | 2021-11-16 | An injection mold for manufacturing a product with a tubular body component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114055720A CN114055720A (en) | 2022-02-18 |
| CN114055720B true CN114055720B (en) | 2025-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111352670.6A Active CN114055720B (en) | 2021-11-16 | 2021-11-16 | An injection mold for manufacturing a product with a tubular body component |
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| CN (1) | CN114055720B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120921630B (en) * | 2025-10-13 | 2025-12-16 | 深圳市维高模塑有限公司 | Injection mold |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205148815U (en) * | 2015-11-05 | 2016-04-13 | 深圳市昌红科技股份有限公司 | Detect reagent box cover mould internal heat cutter constructs |
| CN107081874A (en) * | 2017-05-31 | 2017-08-22 | 董其刚 | A kind of preparation technology of lithium battery thin-wall plastic ring injection mold and utilization the mold injection thin-wall plastic ring |
-
2021
- 2021-11-16 CN CN202111352670.6A patent/CN114055720B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205148815U (en) * | 2015-11-05 | 2016-04-13 | 深圳市昌红科技股份有限公司 | Detect reagent box cover mould internal heat cutter constructs |
| CN107081874A (en) * | 2017-05-31 | 2017-08-22 | 董其刚 | A kind of preparation technology of lithium battery thin-wall plastic ring injection mold and utilization the mold injection thin-wall plastic ring |
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| Publication number | Publication date |
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| CN114055720A (en) | 2022-02-18 |
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