CN112810081B - A core-pulling mold for a protective cover of a blood collection needle - Google Patents
A core-pulling mold for a protective cover of a blood collection needleInfo
- Publication number
- CN112810081B CN112810081B CN202110153890.XA CN202110153890A CN112810081B CN 112810081 B CN112810081 B CN 112810081B CN 202110153890 A CN202110153890 A CN 202110153890A CN 112810081 B CN112810081 B CN 112810081B
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- China
- Prior art keywords
- plate
- core
- ejector pin
- movable mold
- mold
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
- B29C2045/334—Mountings or guides therefor; Drives therefor several transversely movable mould parts driven by a single drive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- 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
- B29C2045/4063—Removing or ejecting moulded articles preventing damage to articles caused by the ejector
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/753—Medical equipment; Accessories therefor
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides a blood taking needle protective sleeve core-pulling mold which comprises a core-pulling mechanism, a movable mold mechanism and a fixed mold mechanism, wherein the fixed mold mechanism comprises a fixed mold plate and a fixed mold cavity, the movable mold mechanism comprises a push plate, a movable mold cavity, an ejection mechanism and a movable mold fixed plate, the movable mold mechanism comprises a transmission mechanism and a cylinder, the cylinder comprises a cylinder body and a cylinder connecting rod, an injection mold core comprises a first fixed part and a core rod part, the core rod part of the injection mold core is arranged between the movable mold cavity and the fixed mold cavity, and when the cylinder connecting rod pulls the transmission mechanism to move, the transmission mechanism can drive the injection mold core to move, and a certain distance is extracted from the mold cavity. By adopting the mechanism, before the movable die mechanism and the fixed die mechanism are opened, the injection molding core is pulled out for a certain distance, so that after the movable die mechanism and the fixed die mechanism are opened, the wall thickness of an injection molding product is not easy to break at the position of 0.25mm, the yield of the plastic product is improved, the die structure is simplified, the cost is reduced, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of injection molding, in particular to a blood taking needle protective sleeve core-pulling mold.
Background
Along with the development of medical industry, the demand of thin-wall medical plastic products is gradually increased, but the yield and the cost of the thin-wall medical plastic products are all difficult to control all the time, the plastic products are ejected out of the movable mold core through the push plate and the sliding block in the existing mold, the plastic products are easy to deform and crack at the position of the 0.25mm thin-wall thickness of the plastic products in the ejection process due to the fact that the holding force of the plastic products to the movable mold core is relatively large, the plastic products are unqualified, the mold structure is complex, the thickness and the size of the mold are relatively large, a large-model injection molding machine is needed for injection molding, the production cost is high, and the production efficiency is low.
Disclosure of Invention
In order to solve the problems, the invention provides a blood taking needle protective sleeve core pulling mold, which comprises a core pulling mechanism, a movable mold mechanism and a fixed mold mechanism, wherein the fixed mold mechanism comprises a fixed mold fixing plate and a fixed mold cavity, the fixed mold cavity is fixedly connected with the fixed mold fixing plate, the movable mold mechanism comprises a push plate, a movable mold cavity, an ejection mechanism and a movable mold fixing plate, the movable mold cavity is fixedly connected with the movable mold plate, the fixed mold mechanism is arranged right above the movable mold mechanism and is sleeved with the movable mold mechanism, and the movable mold cavity is in contact connection with the fixed mold cavity;
The core pulling mechanism is used for pulling the injection molding core and comprises a transmission mechanism and a cylinder, the cylinder comprises a cylinder body and a cylinder connecting rod, the injection molding core comprises a first fixing part and a core rod part, the first fixing part is fixedly connected with the transmission mechanism, and the cylinder connecting rod is fixedly connected with the transmission mechanism;
The core rod part of the injection molding core is arranged between the movable mold cavity and the fixed mold cavity, the fixed mold cavity and the movable mold cavity both comprise injection molding runners and product cavities, a push plate mounting groove is formed in the movable mold plate, the push plate is arranged in the push plate mounting groove and is sleeved with the movable mold plate, the ejection mechanism is arranged below the movable mold plate, the movable mold fixing plate is arranged below the ejection mechanism, mounting holes for penetrating the core pulling mechanism are formed in the push plate and the movable mold plate, the core pulling mechanism penetrates into the mounting holes, a transmission mechanism of the core pulling mechanism is arranged in the push plate, and a cylinder of the core pulling mechanism is arranged in the ejection mechanism;
When the cylinder connecting rod pulls the transmission mechanism to move, the transmission mechanism can drive the injection molding core to move, and a certain distance is drawn out from the mold cavity.
By adopting the mechanism, under the cooperation of the air cylinder, the transmission mechanism and the injection molding core, the injection molding core is automatically pulled out of the die cavity for a certain distance, and because the injection molding core is pulled out for a certain distance before the movable die mechanism and the fixed die mechanism are opened, the thin wall thickness of an injection molding product is not easy to break at the position of 0.25mm after the movable die mechanism and the fixed die mechanism are opened, the yield of the plastic product is improved, the die structure is simplified, the production cost is reduced, and the production efficiency is improved.
The transmission mechanism comprises a pressing block, a clamping block and a sliding block, wherein the cylinder connecting rod is arranged below the pressing block and connected with the pressing block, the clamping block is arranged between the pressing block and the sliding block, one side of the pressing block is provided with a first inclined plane, one side of the sliding block facing the first inclined plane is provided with an inclined plane guide chute, the other side of the sliding block is fixedly connected with a first fixing part, the clamping block comprises a supporting part and a clamping part, the supporting part is fixedly connected with the first inclined plane, the side edge of the clamping part is provided with a clamping lug, the clamping lug is arranged in the inclined plane guide chute and is in sliding connection with the inclined plane guide chute,
When the cylinder connecting rod pulls the pressing block downwards, the pressing block moves downwards together with the clamping block, and under the cooperation of the clamping lug and the inclined plane guide chute, the sliding block drives the injection molding core to move towards the vertical direction of the movement of the pressing block.
Preferably, the injection molding machine further comprises a cooling core pipe, wherein the cooling core pipe comprises a second fixing part and a core pipe part, a cavity for accommodating the core pipe part is arranged in the injection molding core, a cooling liquid flow passage is arranged in the sliding block, a channel is arranged in the cooling core pipe, the cooling liquid flow passage is communicated with the channel, the second fixing part is fixedly connected with the sliding block, and a cooling liquid feed port is formed in one side of the sliding block.
The cooling core pipe is arranged in the injection molding core, and the cooling liquid flows into the channel from the cooling flow channel, so that the temperature of the injection molding core is reduced in the injection molding process of the injection molding core, the service life of the injection molding core is prolonged, and the injection molding cycle can be shortened to a certain extent.
Preferably, at least one injection core is arranged on the transmission mechanism at intervals.
The transmission mechanism is provided with a plurality of injection molding cores at intervals, so that the production efficiency can be effectively improved.
Preferably, the device further comprises a fixing block, wherein the fixing block is arranged on one side, away from the clamping block, of the sliding block and is fixedly connected with the sliding block, and the first fixing part penetrates through the fixing block and is fixedly connected with the fixing block.
The injection molding core and the cooling core tube are respectively fixed in the fixed block and the sliding block, so that the processing cost is reduced.
Preferably, the ejection mechanism comprises ejector pins, a first ejector pin plate, an ejector pin supporting plate, a second ejector pin plate, ejector pins, equal-height screws and push rods, wherein the first ejector pin plate and the ejector pin supporting plate are provided with cylinder through holes, the second ejector pin plate is provided with grooves, the cylinder penetrates through the cylinder through holes on the first ejector pin plate and the ejector pin supporting plate and is arranged in the grooves, ejector pin channels are respectively arranged in a movable mold plate and a movable mold cavity, one end of each ejector pin is arranged in the first ejector pin plate, the other end of each ejector pin is arranged in the ejector pin channel in the movable mold plate and the movable mold cavity, the ejector pin supporting plate is fixedly connected with the first ejector pin plate, the second ejector pin plate is provided with ejector pin through holes, the ejector pins penetrate through the ejector pin through holes on the second ejector pin plate and the ejector pin supporting plate, the movable mold plate, one end of each push rod is fixedly connected with the second ejector pin plate, the other end of each push rod penetrates through the movable mold plate, the push rod through holes on the first ejector pin plate and the ejector pin supporting plate are fixedly connected with the push plates, the equal-height screws comprise connecting parts and abutting parts, the ejector pins penetrate through the connecting through holes and the connecting parts and the connecting through holes on the supporting plates and the second ejector pins respectively,
When the first ejector plate moves upwards for a limiting distance, the abutting part of the equal-height screw abuts against the second ejector plate, and when the first ejector plate continues to move upwards, the abutting part drives the second ejector plate to move upwards.
Preferably, the core pulling mechanisms are arranged in two groups, and the two groups of core pulling mechanisms are arranged in the push plate side by side.
Preferably, the injection molding die further comprises a guide block, wherein the guide block is arranged at one end of the push plate facing the movable die cavity and the fixed die cavity and fixedly connected with the push plate, a second guide chute matched with the injection molding core is arranged in the guide block, and the core rod part penetrates through the chute and is arranged between the movable die cavity and the fixed die cavity.
Preferably, a compressed air inlet channel is arranged in the push plate, a compressed air inlet pipe communicated with the compressed air inlet channel is arranged in the guide block, and the compressed air inlet pipe is communicated with the second guide chute.
The lancet protective cover core pulling mold of the present invention is provided with the lancet protective cover core pulling mechanism as described above, and the mechanism thereof is described with reference to the above. The lancet protective sleeve core pulling mold comprises the mechanism, so that the technical effect produced by the mechanism can be produced, and the invention is not repeated herein with reference to the description.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram showing the whole structure of an embodiment 1 of a lancet protective cover core pulling mechanism of the present invention;
FIG. 2 is an exploded view of embodiment 1 of the present invention;
FIG. 3 is a schematic view of a lancet protective cover core pulling mold according to the present invention;
FIG. 4 is a sectional view of the lancet protective cover core pulling mold A-A of FIG. 3;
FIG. 5 is a schematic view of the enlarged partial structure of FIG. 4;
FIG. 6 is a schematic diagram of a movable mold mechanism of a core-pulling mold of a blood taking needle protective sleeve according to the invention;
FIG. 7 is a schematic structural view of a fixed die mechanism of a core-pulling die of a blood taking needle protective sleeve of the invention;
FIG. 8 is a sectional view of the lancet protective cover core pulling mold B-B of FIG. 3;
FIG. 9 is a sectional view of the lancet protective cover core pulling mold C-C of FIG. 3;
Fig. 10 is a schematic view of a structure of a lancet protective cover core-pulling mold during core pulling;
FIG. 11 is a partial sectional view of the lancet protective cover core pulling mold D-D of FIG. 3;
Reference numeral 1, a core pulling mechanism; 11, a transmission mechanism; 12, injection molding a core; 13, cylinder, 131, cylinder body, 132, cylinder connecting rod, 121, first fixed part, 122, core rod part, 111, press block, 112, clamping block, 113, slide block, 1111, first inclined surface, 1131, inclined surface guiding slide way, 1121, supporting part, 1122, clamping part, 11221, clamping ear, 14, cooling core pipe, 141, second fixed part, 142, core pipe part, 123, cavity, 143, channel, 1132, cooling liquid feed inlet, 15, fixed block, 2, movable mould mechanism, 3, fixed mould mechanism, 31, fixed mould fixed plate, 32, fixed mould cavity, 33, gate insert, 34, injection runner, 331, hidden gate, 21, push plate, 22, movable mould plate, 23, movable mould cavity, 24, movable mould fixed plate, 221, push plate mounting groove, 211, mounting hole, 25, ejector pin, 26, first ejector pin, 27, ejector pin, 28, second ejector pin, 29, 291, high screw, 292, push rod, 2911, through hole, 281, groove, 222, 282, guide pin, 2921, guide block, 2931, air inlet pipe, 2931, guide through hole, 2931, air inlet pipe, guide through hole 212.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1,2 and 4, embodiment 1 is a lancet protective sleeve core pulling mechanism, the core pulling mechanism 1 is used for pulling an injection molding core 12, and includes a transmission mechanism 11, a fixing block 15, a cooling core tube 14 and a cylinder 13, the cylinder 13 includes a cylinder body 131 and a cylinder rod 132, the injection molding core 12 includes a first fixing portion 121 and a core rod portion 122, the cooling core tube 14 includes a second fixing portion 141 and a core tube portion 142, and a cavity 123 accommodating the core tube portion 142 is provided in the injection molding core 12.
The transmission mechanism 11 comprises a pressing block 111, a clamping block 112 and a sliding block 113, wherein a cylinder connecting rod 132 is arranged below the pressing block 111 and is connected with the pressing block 111, the clamping block 112 is arranged between the pressing block 111 and the sliding block 113, a first inclined plane 1111 is arranged on one side of the pressing block 111, an inclined plane guide chute 1131 is arranged on one side of the sliding block 113 facing the first inclined plane 1111, a fixed block 15 is arranged on the other side of the sliding block 113, the sliding block 113 is fixedly connected with the fixed block 15, the clamping block 112 comprises a supporting portion 1121 and a clamping portion 1122, the supporting portion 1121 is fixedly connected with the first inclined plane 1111, clamping lugs 11221 are arranged on the side edges of the clamping portion 1122, and the clamping lugs 11221 are arranged in the inclined plane guide chute 1131 and are in sliding connection with the inclined plane guide chute 1131.
The cooling core rod is characterized in that a cooling liquid flow channel is arranged in the sliding block 113, a channel 143 is arranged in the cooling core tube 14, the cooling liquid flow channel is communicated with the channel 143, a cooling liquid feed port 1132 is arranged on one side of the sliding block 113, a mounting hole matched with the injection molding core 12 is formed in the fixing block 15, the first fixing part 121 is fixedly connected with the fixing block 15 through the mounting hole, the second fixing part 141 is fixedly connected with the sliding block 113, the core tube part 142 is arranged in a cavity 123 of the injection molding core rod 12, and cooling liquid enters the cooling liquid flow channel and the channel 143 from the cooling liquid feed port 1132 to cool the injection molding core 12.
4 Injection molding cores 12 are arranged on the fixed block 15 at intervals, the cooling core pipe 14 is also 4, when the cylinder connecting rod 132 pulls the pressing block 111 downwards, the pressing block 111 moves downwards together with the clamping block 112, the sliding block 113 drives the injection molding cores 12 to move towards the vertical direction of the pressing block 111 under the cooperation of the clamping lug 11221 and the inclined plane guide sliding groove 1131, so that the injection molding cores 12 are extracted from the injection molding products 4 for a certain distance, and the injection molding products 4 are not easy to break at the position of 0.25mm after the blood taking needle protective sleeve core-pulling mold is opened between the movable mold mechanism 2 and the fixed mold mechanism 3.
As shown in fig. 3-11, the invention further provides an embodiment of a lancet protective sleeve core-pulling mold, the lancet protective sleeve core-pulling mold comprises a movable mold mechanism 2 and a fixed mold mechanism 3, the fixed mold mechanism 3 comprises a fixed mold fixing plate 31 and a fixed mold cavity 32, the fixed mold cavity 32 is fixedly connected with the fixed mold fixing plate 31, the movable mold mechanism 2 comprises two groups of core-pulling mechanisms 1, a push plate 21, a guide block 293, a movable mold plate 22, a movable mold cavity 23, an ejection mechanism and a movable mold fixing plate 24, the movable mold cavity 23 is fixedly connected with the movable mold plate 22, the fixed mold mechanism 3 is arranged right above the movable mold mechanism 2 and is sleeved with the movable mold mechanism 2, the movable mold cavity 23 is in contact connection with the fixed mold cavity 32 to form an injection mold cavity, and a core rod part 122 of the injection mold core 12 is arranged between the movable mold cavity 23 and the fixed mold cavity 32.
The fixed mold cavity 32 and the movable mold cavity 23 both comprise an injection runner 34 and a product cavity, a gate insert 33 is arranged in the product cavity, a submarine gate 331 is arranged on one side of the gate insert 33, and the injection runner 34 is communicated with the product cavity through the submarine gate 331.
The movable template 22 is provided with a push plate mounting groove 221, the push plate 21 is arranged in the push plate mounting groove 221 and is sleeved with the movable template 22, the ejection mechanism is arranged below the movable template 22, the movable template fixing plate 24 is arranged below the ejection mechanism, the push plate 21 and the movable template 22 are provided with mounting holes 211 for two groups of core-pulling mechanisms 1 to penetrate, the two groups of core-pulling mechanisms 1 are arranged side by side, the two groups of core-pulling mechanisms 1 respectively penetrate the mounting holes 211, the transmission mechanism 11 of the two groups of core-pulling mechanisms 1 is arranged in the push plate 21, and the air cylinder 13 of the core-pulling mechanism 1 is arranged in the ejection mechanism.
The ejector mechanism comprises ejector pins 25, a first ejector pin plate 26, an ejector pin supporting plate 27, a second ejector pin plate 28, ejector pins 29, equal-height screws 291 and ejector rods 292, wherein the first ejector pin plate 26 and the ejector pin supporting plate 27 are provided with cylinder through holes 261, the second ejector pin plate 28 is provided with grooves 281, the cylinder 13 penetrates through the cylinder through holes 261 on the first ejector pin plate 26 and the ejector pin supporting plate 27 to be arranged in the grooves 281, ejector pin channels 222 are respectively arranged in the movable mold plate 22 and the movable mold cavity 23, one end of the ejector pin 25 is arranged in the first ejector pin plate 26, the other end of the ejector pin 25 is arranged in the ejector pin channels 222 in the movable mold plate 22 and the movable mold cavity 23, the ejector pin channels 222 are communicated with the injection molding flow channels 34, the ejector pin supporting plate 27 is fixedly connected with the first ejector pin plate 26, the movable mold fixing plate 24 and the second ejector pin plate 28 are respectively provided with ejector pin through holes 282, one end of the ejector pins 29 is arranged in the ejector pin through holes 282 on the movable mold fixing plate 24, and the other end of the ejector pins 29 penetrates through the ejector pin through holes 282 on the second ejector pin plates 28 to be fixedly connected with the ejector pins 27.
The movable mold plate 22, the first ejector plate 26 and the ejector pin support 27 are respectively provided with a push rod through hole 223, one end of a push rod 292 is fixedly connected with the second ejector plate 28, the other end of the push rod 292 passes through the push rod through holes 223 on the movable mold plate 22, the first ejector plate 26 and the ejector pin support 27 to be fixedly connected with the push plate 21, the equal-height screw 291 comprises a connecting part 2911 and an abutting part 2912, the ejector pin support 27 and the second ejector plate 28 are respectively provided with a connecting through hole 271, the connecting part 2911 passes through the connecting through holes 271 on the ejector pin support 27 and the second ejector plate 28 to be fixedly connected with the first ejector plate 26,
When the first ejector plate 26 moves upward by a limited distance, the abutment portion 2912 of the contour screw 291 abuts against the second ejector plate 28, and when the first ejector plate 26 continues to move upward, the abutment portion 2912 drives the second ejector plate 28 to move upward.
The guide block 293 is arranged at one end of the push plate 21 facing the movable mold cavity 23 and the fixed mold cavity 32 and is fixedly connected with the push plate 21, a second guide chute 2931 matched with the injection molding core 12 is arranged in the guide block 293, the core rod part 122 passes through the second guide chute 2931 and is arranged between the movable mold cavity 23 and the fixed mold cavity 32, a compressed air inlet channel 212 is arranged in the push plate 21, a compressed air inlet pipe 2932 communicated with the compressed air inlet channel 212 is arranged in the guide block 293, the compressed air inlet pipe 2932 is communicated with the second guide chute 2931, and compressed air is introduced to separate a plastic product 4 on the injection molding core 12 from the injection molding core 12.
The working principle of the lancet protective sleeve core pulling mold comprising the lancet protective sleeve core pulling mechanism is that after the mold completes the injection molding, before the movable mold mechanism 2 and the fixed mold mechanism 3 are opened, a first stage core pulling step is started, fig. 5 is a schematic diagram of a local amplifying structure of fig. 4 when the lancet protective sleeve core pulling mold performs the first stage core pulling step, the cylinder 13 works first, the cylinder connecting rod 132 drives the pressing block 111 to move downwards for a distance S1, the pressing block 111 drives the clamping block 112 to move together, and under the action of the cooperation of the clamping block 112 and the inclined plane guiding chute 1131, the sliding block 113 drives the injection molding core 12 to move towards the vertical direction of the movement of the pressing block 111, so that the injection molding core 12 is pulled out of the injection molding product 4 for a distance S2, but is not completely separated.
After the injection core 12 is pulled out of the injection product 4 by the distance S2, the fixed mold mechanism 3 and the movable mold mechanism 2 are opened, the movable mold mechanism 2 moves downwards, and the plastic product 4 is separated from the fixed mold cavity 3.
Next, a first stage ejection step is started, fig. 8 is a sectional view of the lancet protective cover core pulling mold during the first stage core pulling step, where an ejector rod on the injection molding machine pushes an ejector rod 29 on the lancet protective cover core pulling mold to move S3 distance, and under the cooperation of the ejector rod 29 with the first ejector plate 26, the ejector pin supporting plate 27 and the ejector pins 25, the ejector pins 25 move upward S3 distance together, so that the ejector pins 25 penetrate out of the ejector pin channels 222, eject the waste materials in the injection molding runner 34 out of the movable mold cavity 23, during this process, the second ejector pin supporting plate 28 remains motionless, and the plastic product 4 remains in the movable mold cavity 23.
After the ejector rod 29 is ejected upwards by a distance S3, the abutting portion 2912 of the equal-height screw 291 abuts against the second ejector plate 28, then the second stage ejection step is started, fig. 9 is a sectional view of the lancet protective sleeve core pulling die when the second stage ejection step is performed, the ejector rod 29 continues to be ejected upwards, the equal-height screw 291 drives the second ejector plate 28 to move upwards by a distance S4, one end of the push rod 292 is fixedly connected with the second ejector plate 28, the other end of the push rod 292 is fixedly connected with the push plate 21, and the cylinder 13 is arranged on the second ejector plate 28, so that the core pulling mechanism 1 moves upwards by a distance S4 together, and the injection molding core 12 drives the plastic product 4 to eject the movable mold cavity 23 together.
Since the plastic product 4 is not completely separated from the injection mold core 12, fig. 11 is a partial sectional view of the lancet protective cover core-pulling mold after the second stage ejection step, and then starts the second stage core-pulling step, fig. 10 is a sectional view of the lancet protective cover core-pulling mold after the second stage core-pulling step, at this moment, compressed air is injected from the compressed air intake channel 212 in the push plate 21, and then compressed air enters the second guide chute 2931 from the compressed air intake pipe 2932 and is blown out, separating the plastic product 4 from the injection mold core 12, and finally completing core pulling.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement or improvement made within the spirit and principles of the invention.
Claims (9)
1. The loose core mold for the blood taking needle protective sleeve is characterized by comprising a loose core mechanism, a movable mold mechanism and a fixed mold mechanism, wherein the fixed mold mechanism comprises a fixed mold fixing plate and a fixed mold cavity, the fixed mold cavity is fixedly connected with the fixed mold fixing plate, the movable mold mechanism comprises a push plate, a movable mold cavity, an ejection mechanism and a movable mold fixing plate, the movable mold cavity is fixedly connected with the movable mold plate, and the fixed mold mechanism is arranged right above the movable mold mechanism and is sleeved with the movable mold mechanism, and the movable mold cavity is in contact connection with the fixed mold cavity;
The core pulling mechanism is used for pulling the injection molding core and comprises a transmission mechanism and an air cylinder, wherein the air cylinder comprises an air cylinder body and an air cylinder connecting rod, the injection molding core comprises a first fixing part and a core rod part, the first fixing part is fixedly connected with the transmission mechanism, and the air cylinder connecting rod is fixedly connected with the transmission mechanism;
The core rod part of the injection molding core is arranged between the movable mold cavity and the fixed mold cavity, the fixed mold cavity and the movable mold cavity both comprise injection molding runners and product cavities, a push plate mounting groove is formed in the movable mold plate, the push plate is arranged in the push plate mounting groove and is sleeved with the movable mold plate, the ejection mechanism is arranged below the movable mold plate, the movable mold fixing plate is arranged below the ejection mechanism, mounting holes for penetrating the core pulling mechanism are formed in the push plate and the movable mold plate, the core pulling mechanism penetrates into the mounting holes, a transmission mechanism of the core pulling mechanism is arranged in the push plate, and a cylinder of the core pulling mechanism is arranged in the ejection mechanism;
when the cylinder connecting rod pulls the transmission mechanism to move, the transmission mechanism can drive the injection molding core to move, and a certain distance is extracted from the mold cavity.
2. The lancet protective sleeve core pulling mold according to claim 1, wherein the transmission mechanism comprises a pressing block, a clamping block and a sliding block, the cylinder connecting rod is arranged below the pressing block and connected with the pressing block, the clamping block is arranged between the pressing block and the sliding block, a first inclined plane is arranged on one side of the pressing block, an inclined plane guiding chute is arranged on one side of the sliding block facing the first inclined plane, the other side of the sliding block is fixedly connected with the first fixing part, the clamping block comprises a supporting part and a clamping part, the supporting part is fixedly connected with the first inclined plane, a clamping lug is arranged on the side edge of the clamping part, and the clamping lug is arranged in the inclined plane guiding chute and is in sliding connection with the inclined plane guiding chute;
When the cylinder connecting rod pulls down the briquetting, the briquetting with the fixture block moves down together, under the cooperation of joint ear with inclined plane guide chute, the slider drives the injection molding core towards the perpendicular direction motion of briquetting motion.
3. The lancet protective cover core pulling mold according to claim 2, further comprising a cooling core tube, wherein the cooling core tube comprises a second fixing portion and a core tube portion, a cavity for accommodating the core tube portion is arranged in the injection core tube, a cooling liquid flow channel is arranged in the sliding block, a channel is arranged in the cooling core tube, the cooling liquid flow channel is communicated with the channel, the second fixing portion is fixedly connected with the sliding block, and a cooling liquid feed port is arranged on one side of the sliding block.
4. The lancet protective cover loose core mold according to claim 2, wherein:
at least one injection molding core is arranged on the transmission mechanism at intervals.
5. The lancet protective cover loose core mold according to claim 2, further comprising a fixing block, wherein the fixing block is arranged on one side of the sliding block away from the clamping block and is fixedly connected with the sliding block, and the first fixing portion penetrates through the fixing block and is fixedly connected with the fixing block.
6. The lancet protective sleeve core pulling mold according to claim 1, wherein the ejector mechanism comprises ejector pins, a first ejector pin plate, an ejector pin supporting plate, a second ejector pin plate, ejector pins, equal-height screws and push rods, wherein the first ejector pin plate and the ejector pin supporting plate are provided with cylinder through holes, grooves are formed in the second ejector pin plate, the cylinder penetrates through the cylinder through holes in the first ejector pin plate and the ejector pin supporting plate and is arranged in the grooves, ejector pin channels are respectively arranged in the movable mold plate and the movable mold cavity, one end of each ejector pin is arranged in the first ejector pin plate, the other end of each ejector pin is arranged in the ejector pin channel in the movable mold plate and the movable mold cavity, the ejector pin supporting plate is fixedly connected with the first ejector pin supporting plate, the second ejector pin plate is provided with ejector pin through holes, the ejector pins penetrate through the ejector pin through holes in the second ejector pin plate and are respectively arranged in the second ejector pin supporting plate, one end of each ejector pin is fixedly connected with the second ejector pin plate, the other end of each ejector pin penetrates through the movable mold plate, the ejector pin plate and the first ejector pin plate and the ejector pin supporting plate are fixedly connected with the first ejector pin supporting plate and the ejector pin supporting plate, the ejector pin supporting plate and the ejector pin supporting plate are fixedly connected with the ejector pins respectively, and the ejector pins are fixedly connected with the ejector pins through the ejector pins respectively,
When the first ejector plate moves upwards for a limiting distance, the abutting part of the equal-height screw abuts against the second ejector plate, and when the first ejector plate continues to move upwards, the abutting part drives the second ejector plate to move upwards.
7. The lancet protective cover core pulling mold as set forth in claim 1, wherein said core pulling mechanism is provided with two sets, said two sets being disposed side by side in said push plate.
8. The lancet protective cover core pulling mold according to claim 1, further comprising a guide block, wherein the guide block is arranged at one end of the push plate facing the movable mold cavity and the fixed mold cavity and is fixedly connected with the push plate, a second guide sliding groove matched with the injection mold core is arranged in the guide block, and the core rod part penetrates through the sliding groove and is arranged between the movable mold cavity and the fixed mold cavity.
9. The lancet protective cover loose core mold according to claim 8, wherein a compressed air inlet channel is arranged in the push plate, a compressed air inlet pipe communicated with the compressed air inlet channel is arranged in the guide block, and the compressed air inlet pipe is communicated with the second guide sliding groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110153890.XA CN112810081B (en) | 2021-02-04 | 2021-02-04 | A core-pulling mold for a protective cover of a blood collection needle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110153890.XA CN112810081B (en) | 2021-02-04 | 2021-02-04 | A core-pulling mold for a protective cover of a blood collection needle |
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| CN112810081B true CN112810081B (en) | 2025-08-08 |
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| CN114953365B (en) * | 2022-07-29 | 2022-09-30 | 赫比(成都)精密塑胶制品有限公司 | Mold structure |
| EP4574392A1 (en) * | 2023-12-19 | 2025-06-25 | Ypsomed AG | Core drawing unit for injection molding tool |
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| CN108407231A (en) * | 2018-06-13 | 2018-08-17 | 乌鲁木齐九品芝麻信息科技有限公司 | A kind of cylinder ejector side action sliders component injection mold |
| CN108747979A (en) * | 2018-07-03 | 2018-11-06 | 苏州富强科技有限公司 | A kind of spring-compressed mechanism and a kind of pressure mounting of the spring equipment |
| CN214872389U (en) * | 2021-02-04 | 2021-11-26 | 森骏卓越精密智造(深圳)有限公司 | Blood taking needle protective sheath core pulling mechanism and core pulling mold |
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| CN104476735A (en) * | 2014-11-24 | 2015-04-01 | 深圳创维精密科技有限公司 | Side core-pulling mechanism and injection mould |
| CN104690914A (en) * | 2015-03-25 | 2015-06-10 | 韩立艳 | Mold three-dimensional core-pulling demolding mechanism |
| CN104772874A (en) * | 2015-05-01 | 2015-07-15 | 陈伟娅 | Injection molding air cylinder and floating ejection oil cylinder combined side ejection mechanism |
| CN206048716U (en) * | 2016-09-20 | 2017-03-29 | 宁海县第一注塑模具有限公司 | A kind of oblique core pulling differential linkage stripper apparatus of the straight plunger tip of injection mold |
| CN108453236A (en) * | 2018-03-05 | 2018-08-28 | 肇庆高新区鸿胜模具制造有限公司 | Core pulling needle fast replacing device |
| CN209050978U (en) * | 2018-10-11 | 2019-07-02 | 杭州强本塑胶科技有限公司 | A kind of structure of side core-pulling easy to disassemble |
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| CN108407231A (en) * | 2018-06-13 | 2018-08-17 | 乌鲁木齐九品芝麻信息科技有限公司 | A kind of cylinder ejector side action sliders component injection mold |
| CN108747979A (en) * | 2018-07-03 | 2018-11-06 | 苏州富强科技有限公司 | A kind of spring-compressed mechanism and a kind of pressure mounting of the spring equipment |
| CN214872389U (en) * | 2021-02-04 | 2021-11-26 | 森骏卓越精密智造(深圳)有限公司 | Blood taking needle protective sheath core pulling mechanism and core pulling mold |
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