CN114536663A - Prevent hot wall sheath mould - Google Patents

Abstract

The application relates to a firewall sheath mold, and relates to the technical field of rubber injection molds; the injection molding assembly comprises an upper mold core plate, a lower mold core plate and a heating element for heating the upper mold core plate and the lower mold core plate; a plurality of cavities are jointly formed between the lower core plate and the lower core plate, and a mold core matched with the shape of the outer surface of the firewall sheath is arranged in each cavity; all the cavities are communicated with a flow channel for flowing of injection raw materials, and one end of the flow channel, which is far away from the cavities, is communicated with an injection inlet for injecting the raw materials into each cavity; the flow channel is also communicated with an air extraction assembly for extracting air in all the cavities; this application has the effect of optimizing the hot wall sheath quality of producing, reduction defective percentage.

Description

Prevent hot wall sheath mould

Technical Field

The application relates to the technical field of rubber injection molds, in particular to a firewall sheath mold.

Background

An automobile firewall is the name of a component in an automobile; in the automobile, a passenger and an engine are separated by using a firewall, and once the automobile engine catches fire, the firewall can not only protect the safety of the passenger, but also enable a driver to continuously control the engine; the engine compartment needs to pass through a sheet metal part of the firewall to reach the inside of the room, and the firewall sheath is a rubber part used for protecting the wiring harness passing through the firewall and preventing the wiring harness from being damaged; and the firewall sheath mold is a mold for producing the firewall sheath.

A related Chinese patent with the publication number of CN205202024U discloses a forming die for a wire harness sheath of an automobile firewall, which comprises an upper die and a lower die, wherein the upper die is provided with a plurality of upper die cavities with the same structure, the lower die is provided with a plurality of lower die cavities matched with the upper die cavities, a plurality of cavities are formed when the upper die cavities and the lower die cavities are matched, the inner walls of the cavities are provided with a plurality of circles of grooves with different depths and matched with the outer surface of a product, the middle parts of the cavities are provided with die cores which are provided with columnar structures and matched with the inner surface of the product, the upper die cavities are internally provided with inserts for fixing framework pieces, the die cores penetrate through the inserts and are fixed on the upper die, and the upper die is provided with injection flow channels leading to the cavities; when processing, will go up mould and lower mould compound die, then can be with the injection equipment that the external equipment contained the semifluid raw materials, through the nozzle that is used for penetrating the semifluid raw materials on the injection equipment, to injecting the semifluid raw materials in the injection flow way, semifluid rubber raw materials flow in the die cavity, the die core is moulding to the raw materials to make the raw materials after the solidification form with the consistent hot wall sheath of preventing of die core surface, the realization is to the shaping of preventing hot wall sheath.

In view of the above-mentioned related technologies, the inventors found that before the semi-fluid rubber raw material is injected into the cavity, since air remains in the cavity, part of the air cannot be discharged out of the cavity in time, and occupies part of the space in the cavity, the semi-fluid rubber raw material injected into the cavity cannot fill the whole cavity, and further, a gap exists on the outer surface of the injection molded firewall sheath, so that the firewall sheath becomes a defective product, that is, the reject ratio of the produced firewall sheath is increased.

Disclosure of Invention

In order to improve the higher technical problem of hot wall sheath defective rate that present hot wall sheath production technology corresponds, this application provides a hot wall sheath mould.

The application provides a prevent hot wall sheath mould adopts following technical scheme:

a firewall sheath mold comprises an injection molding assembly, wherein the injection molding assembly comprises an upper mold core plate, a lower mold core plate and a heating element for heating the upper mold core plate and the lower mold core plate; a plurality of cavities are jointly formed between the lower core plate and the lower core plate, and a mold core matched with the shape of the outer surface of the firewall sheath is arranged in each cavity; all the cavities are communicated with a flow channel for flowing of injection raw materials, and one end of the flow channel, which is far away from the cavities, is communicated with an injection inlet for injecting the raw materials into each cavity; the flow passage is also communicated with an air extraction assembly for extracting air in the cavity.

Through adopting above-mentioned technical scheme, before moulding plastics, with going up on the fixed lid of mould benevolence board fits on the lower mould benevolence board, then take out the residual air in all mould benevolence chambeies through the subassembly of bleeding in advance, so that all mould benevolence intracavity all is in negative pressure state, follow injection entrance injection semifluid rubber raw materials after that, semifluid rubber raw materials flows through the runner from the injection entrance and is injecting into the mould intracavity, heat mould benevolence board and lower mould benevolence board through the heating member, so that semifluid rubber raw materials is heated the solidification, in semifluid rubber raw materials curing process, come to prescribe a limit to the solidification shape through mold core structure and cavity structure, so that semifluid rubber raw materials final solidification forms and prevents hot wall sheath, the realization is to preventing the shaping production of hot wall sheath.

As preferred, the injection moulding subassembly is still including setting up the roof in upper mold benevolence board top to and can dismantle the position circle of connecting on the roof, the intercommunication mouth that is linked together with the injection entry is seted up at the position circle middle part, the intercommunication mouth inner wall is provided with the binding face along its circumference, the binding face closely laminates with the face wall that penetrates the mouth injection portion that is used for injecting semifluid rubber raw materials.

Through adopting above-mentioned technical scheme, this application mould will be linked together with the injection apparatus of semifluid rubber raw materials to make injection apparatus's the injection portion that jets out the mouth insert the intercommunication mouth, so that can flow into in the intercommunication mouth from the semifluid rubber raw materials that jets out of mouth, and the setting of binding face can improve the connection compactness of jetting mouth and intercommunication mouth, prevents that semifluid rubber raw materials from spilling over the intercommunication mouth, makes semifluid rubber raw materials can concentrate and flow into in the intercommunication mouth fast.

Preferably, the air exhaust assembly comprises a transverse air exhaust pipe, longitudinal air exhaust pipes uniformly communicated with the transverse air exhaust pipe along the length direction of the transverse air exhaust pipe, a plurality of air exhaust branch pipes communicated with each longitudinal air exhaust pipe, and an air exhaust pump communicated with the end part of the transverse air exhaust pipe; the side wall of the lower die core plate, which faces the upper die core plate, is provided with an air exhaust channel, the outer surface of the lower die core plate, which is close to each die cavity, is provided with a plurality of air grooves communicated with the die cavities, the air grooves are communicated with the air exhaust channel, and all the air exhaust branch pipes are communicated with the air exhaust channel.

Through adopting above-mentioned technical scheme, through the gas in the air exhaust horizontal pipe of air exhaust pump extraction, owing to violently manage through the vertical axis of bleeding, the branch pipe of bleeding, bleed passage and gas tank and the die cavity is linked together, consequently can draw the gas in the die cavity through the air exhaust pump, because each die cavity all corresponds there is a plurality of gas tank, consequently, can accelerate the extraction to the die cavity internal gas, improve the efficiency of bleeding.

Preferably, the inner part of the lower die core plate close to the air groove is detachably connected with a blocking block, and the thickness of the blocking block is smaller than or equal to the depth of the air groove.

Through adopting above-mentioned technical scheme, can dismantle the shutoff piece that connection thickness is unequal in the gas pocket, when the thickness of shutoff piece equals the gas pocket groove deeply, the gas pocket is stopped up to the shutoff piece, so that the gas pocket that corresponds can't make corresponding die cavity and air exhaust passage be linked together, thereby make the gas in the die cavity can concentrate to be taken out from the gas pocket that shutoff piece thickness is less than the gas pocket groove is dark, and the shutoff piece that thickness is less than the gas pocket groove is dark can prevent in the follow-up semifluid rubber feed stream air inlet duct that gets into the type groove, and then influence the final fire wall sheath quality that generates.

Preferably, the outer side walls of the upper die core plate and the lower die core plate are provided with rubber insertion sealing ring grooves along the circumferential direction.

Through adopting above-mentioned technical scheme, the leakproofness that can improve lower mould benevolence board and last mould benevolence board seam crossing is inlayed to rubber in the sealing ring groove, reduces outside air entering die cavity for the die cavity can form negative pressure state fast under the effect of the subassembly of bleeding.

Preferably, the mold core comprises core tubes and inserts arranged in one-to-one correspondence with the core tubes, the cavity comprises jacks for the core tubes to be inserted, the jacks are located on the upper mold core plate, the inserts are inserted at the upper ends of the jacks, insert grooves for the inserts to be inserted are formed in the upper mold core plate close to each insert, and exhaust channels communicated with the insert grooves are formed in the side walls of the upper mold core plate close to each insert groove.

By adopting the technical scheme, the shape structures of the mold core and the mold cavity are consistent with the shape structure of the firewall sheath to be produced, the mold core is inserted into the mold cavity, a gap for the semi-fluid rubber raw material to flow into is reserved between the mold core and the inner wall of the mold cavity, the shape of the gap is also consistent with the shape structure of the firewall sheath, the core pipe belongs to one part of the mold core, the core pipe is inserted into the jack, the end part of the jack is open, the opening of the jack is specially arranged for blocking the opening of the jack by the insert, the core pipe and the insert are arranged into the existing structure in the industry, but the gap between the insert and the jack is easy to exist, so that part of air in the gap between the core pipe and the jack can not be discharged in time, when the semi-fluid rubber raw material flows into the gap between the core pipe and the jack, the air remained in the gap between the core pipe and the jack is discharged out of the jack from the gap between the insert and the jack under the extrusion of the semi-fluid rubber raw material, and the air is discharged into the exhaust channel, so that the air in the cavity is further discharged, and the production quality of the finished firewall jacket at the core pipe position at the final production position is optimized.

Preferably, a bottom plate is arranged below the lower die core plate, a stripping assembly for driving the die cores to be separated from the die cavities is arranged between the lower die core plate and the bottom plate, the stripping assembly comprises a drive plate and a plurality of ejector rods arranged on the side wall of the drive plate, each die core corresponds to an ejector rod, the upper end of each ejector rod is attached to the lower surface of the corresponding die core, and a cavity for the drive plate and the ejector rods to slide is reserved between the lower die core plate and the bottom plate.

Through adopting above-mentioned technical scheme, after the semi-fluid rubber raw materials solidification forms prevents hot wall mould, at first with upper mould benevolence board towards the direction removal of keeping away from lower mould benevolence board to realize the die sinking, remove towards the direction that is close to the mold core through driving the drive plate after that, so that ejector pin drive mold core removes towards the direction of keeping away from lower mould benevolence board, so that the mold core drives fashioned hot wall mould that prevents and breaks away from the die cavity, be convenient for operating personnel takes out and cup joints the hot wall mould of preventing on the mold core, realize taking off the material.

Preferably, the stripping assembly further comprises a plurality of limiting rods vertically arranged on the side wall of the drive plate and limiting springs sleeved outside each limiting plate, the limiting rods and the limiting springs are located on one side, facing the lower die core plate, of the drive plate, one end of each limiting spring is attached to one side, facing the drive plate, of the lower die core plate, and the other end of each limiting spring is attached to the side wall of the drive plate.

By adopting the technical scheme, on one hand, the limiting plate can be attached to the upper surface of the bottom plate by the aid of the limiting spring, the position of the driving plate is limited, and the driving plate is prevented from being touched by external force to drive the ejector rod to move towards the direction close to the mold core in the process of curing and forming the semi-fluid rubber raw material, so that curing and forming of the semi-fluid rubber raw material are influenced; on the other hand, after the drive plate drives the ejector pin under the exogenic action and removes towards the direction that is close to lower mould benevolence board, spacing spring shrink, spacing spring can drive the drive plate this moment and realize reseing.

Preferably, the heating element comprises heating plates symmetrically arranged at the outer sides of the upper die core plate and the lower die core plate, heat insulation plates arranged in one-to-one correspondence with the heating plates, and a plurality of heating pipes for generating heat; the heating plates are attached to the side walls of the positions, deviating from each other, of the upper mold core plate or the lower mold core plate, the heat insulation plates are attached to the corresponding sides, deviating from the cavity, of the heating plates, and the flow channels penetrate through the heating plates and the heat insulation plates; each the hot plate all corresponds a plurality of heating pipe, the heating pipe runs through the hot plate lateral wall that corresponds.

Through adopting above-mentioned technical scheme, the heating pipe themogenesis and with heat transfer to hot plate, the setting up of heat insulating board makes the hot plate to reach the heat transfer of receiving to last mould benevolence board and lower mould benevolence board to the realization is to the heating of going up mould benevolence board and lower mould benevolence board.

Preferably, the heating element comprises heating plates symmetrically arranged on the outer side walls of the upper die core plate and the lower die core plate, heat insulation plates arranged in one-to-one correspondence with the heating plates, and a plurality of heating pipes for generating heat; the heating plate is attached to the side wall of the position where the upper die core plate or the lower die core plate deviates from each other, each side wall of the position where the heat insulation plate is close to the edge is provided with a heat insulation surrounding plate along the circumferential direction of the side wall, the heat insulation surrounding plate and the corresponding heat insulation plate jointly surround to form a heating plate for the corresponding insertion of the insertion groove, the heating plate is completely inserted in the corresponding insertion groove, and the heating pipe penetrates through the heat insulation surrounding plate.

By adopting the technical scheme, the heat dissipation at the circumferential side wall of the heating plate is reduced by the arrangement of the heat insulation surrounding plate, so that the heat received by the heating plate from the heating pipe can be intensively transferred to the upper die core plate and the lower die core plate, the heating effect is optimized, and the heating efficiency is improved; meanwhile, the heating plate can be prevented from scalding operators.

In summary, the present application includes at least one of the following beneficial technical effects:

1. before injection molding, an upper mold core plate is fixedly covered on a lower mold core plate, residual air in all mold cavities is pumped out in advance through an air exhaust assembly so that all the mold cavities are in a negative pressure state, then a semi-fluid rubber raw material is injected from an injection inlet, the semi-fluid rubber raw material flows through a flow channel from the injection inlet and is injected into the mold cavities, the upper mold core plate and the lower mold core plate are heated through a heating element so that the semi-fluid rubber raw material is heated and solidified, in the solidification process of the semi-fluid rubber raw material, the solidification shape is limited through a mold core structure and a mold cavity structure so that the semi-fluid rubber raw material is finally solidified to form a firewall sheath, the defective rate is reduced, and the quality of finished products is improved;

2. can dismantle the shutoff piece that connects the thickness inequality in the gas tank, when the thickness of shutoff piece equals that the gas tank groove is dark, the gas tank is plugged up to the shutoff piece, so that the gas tank that corresponds can't make the die cavity that corresponds and air exhaust passage be linked together, thereby make the gas in the die cavity can concentrate and be less than the gas tank inslot that the gas tank groove is dark from shutoff piece thickness and taken out, and the shutoff piece that thickness is less than the gas tank groove is dark can prevent that the semifluid rubber raw materials in the die cavity from flowing into the gas tank, guarantee semifluid rubber raw materials and can be at the die cavity internal curing moulding, optimize the shaping quality.

Drawings

Fig. 1 is a schematic view of a firewall sheath mold structure in example 1.

Fig. 2 is an exploded view of the various layers of the mold for forming the firewall sheath in example 1.

Fig. 3 is an exploded view of the lower surface structures of the layers of the mold for forming the firewall sheath in example 1.

Fig. 4 is an enlarged schematic view of the structure for section a-a in fig. 1.

Fig. 5 is an enlarged schematic view of the structure for section B-B in fig. 1.

Fig. 6 is an enlarged schematic view of a portion of the structure shown in fig. 5.

FIG. 7 is a sectional view showing the positional relationship between the evacuation assembly and the upper core plate in example 1.

Fig. 8 is a schematic view illustrating the upper surface structure of the lower core plate according to embodiment 1.

Fig. 9 is an enlarged schematic view of the structure of part b in fig. 8.

FIG. 10 is a sectional view for showing a positional relationship between a heating panel and an insulating panel in example 2.

Description of reference numerals: 1. injection molding the assembly; 11. an upper core plate; 111. a cavity; 1111. a jack; 112. a mold core; 1121. a core tube; 1122. an insert; 113. an exhaust passage; 114. sealing the ring groove; 115. inlaying a groove; 12. a lower core plate; 121. an air extraction channel; 122. an air tank; 123. a plugging block; 13. a top plate; 131. an injection inlet; 132. a flow channel; 14. a heating member; 141. heating plates; 142. a heat insulation plate; 143. heating a tube; 144. heat insulation coaming plates; 145. a slot; 15. positioning a ring; 151. a communication port; 152. a binding face; 16. a base plate; 17. a transition plate; 171. a feed through hole; 18. a guide post; 19. a cavity; 2. an air extraction assembly; 21. a horizontal air exhaust pipe; 22. an air exhaust longitudinal pipe; 23. an air exhaust branch pipe; 24. an air pump; 3. a stripping assembly; 31. a drive plate; 32. a top rod; 33. a limiting rod; 34. a limiting spring; 4. and (5) finishing the firewall sheath.

Detailed Description

The present application is described in further detail below with reference to figures 1-10.

Example 1

This application implementation 1 discloses a prevent hot wall sheath mould. Referring to fig. 1 and 2, the fire wall sheath mold comprises an injection molding component 1 and an air extraction component 2, the injection molding component 1 is used for injection molding a semi-fluid rubber raw material to form a solid fire wall sheath finished product 4, the injection molding component 1 comprises an upper mold core plate 11, a lower mold core plate 12, a heating element 14, a top plate 13 and a positioning ring 15, the heating element 14 comprises two heating plates 141, a heat insulation plate 142 arranged on one side of each heating plate 141, and a plurality of heating pipes 143 used for generating heat.

Referring to fig. 1 and 2, an upper core plate 11 and a lower core plate 12 are attached to each other, a side wall of the upper core plate 11 facing away from the lower core plate 12 and a side wall of the lower core plate 12 facing away from the upper core plate 11 are correspondingly attached to a heating plate 141, the other side of each heating plate 141 is corresponding to a heat insulation plate 142, each heating plate 141 is corresponding to a plurality of heating pipes 143, the heating pipes 143 are inserted into the corresponding heating plates 141, the heating pipes 143 may be tubes having heating wires mounted on inner walls thereof, and the heating pipes 143 are powered on by an external power supply of the heating wires to generate heat; the heating pipe 143 may also be a pipe body through which hot water may pass, one end of the heating pipe 143 may be closed, hot water may be injected into the other end of the heating pipe 143, the heating pipe 143 generates heat through the hot water, and after the firewall jacket is injection-molded, cold water may be introduced into the heating pipe 143 to cool the heating plate 141.

Referring to fig. 1 and 2, the heat insulation plate 142 is attached to the side wall of the heating plate 141, a bottom plate 16 is disposed on one side of the heat insulation plate 142 located below, which is away from the heating plate 141, a transition plate 17 is attached to the side wall of the heat insulation plate 142 located above, which is away from the heating plate 141, the side wall of the transition plate 17, which is away from the heat insulation plate 142, is attached to the side wall of the top plate 13, and the positioning ring 15 is mounted on one side of the top plate 13, which is away from the corresponding heat insulation plate 142; the positioning ring 15 and the top plate 13, the top plate 13 and the heat insulation plate 142, the heat insulation plate 142 and the heating plate 141, the heating plate 141 and the upper core plate 11, the heating plate 141 and the lower core plate 12, and the upper core plate 11 can be fixed by arranging a plurality of bolts; guide posts 18 may also extend between the top plate 13, the heat shield 142, the heating plate 141, the upper core plate 11 and the lower core plate 12 to facilitate installation of the respective layers under the guidance of the guide posts 18.

Referring to fig. 1, 2 and 3, a communication opening 151 is formed in the middle of the positioning ring 15, and an attachment surface 152 is arranged on the inner wall of the positioning ring 15 close to the communication opening 151 along the circumferential direction of the communication opening 151; when the semi-fluid rubber raw material needs to be injected, the injection part of the nozzle of the injection device containing the semi-fluid rubber raw material is inserted into the communication port 151, and the surface wall of the injection part of the nozzle is tightly attached to the attachment surface 152 at the moment so as to prevent the semi-fluid rubber raw material injected from the nozzle from overflowing out of the communication port 151; the side wall of the top plate 13 near the positioning ring 15 is provided with an injection inlet 131 communicated with the communication port 151 in a penetrating manner, the lower surface of the top plate 13 is provided with a groove-shaped flow passage 132 communicated with the injection inlet 131, and the semi-fluid rubber raw material entering the communication port 151 passes through the injection inlet 131 and flows into the flow passage 132.

Referring to fig. 3 and 4, the transition plate 17, the heat insulation plate 142 attached to the transition plate 17, and the heating plate 141 attached to the upper mold core plate 11 have a plurality of material passing holes 171 along the thickness direction of the transition plate 17, each material passing hole 171 is communicated with the flow channel 132, the side walls of the upper mold core plate 11 and the lower mold core plate 12 facing each other have a plurality of cavities 111, the cavities 111 and the material passing holes 171 are arranged in a one-to-one correspondence manner, the cavities 111 are communicated under the corresponding material passing holes 171, and the number of the cavities 111 in this embodiment 1 is 6.

Referring to fig. 2, 3 and 4, a mold core 112 is arranged in each cavity 111, the mold core 112 is inserted into the cavity 111, the structure of the cavity 111 and the structure of the mold core 112 are both consistent with the shape and structure of a firewall sheath to be produced, a gap is reserved between the mold core 112 and the inner wall of the cavity 111, and similarly, the shape and structure of the gap is the shape and structure of the firewall sheath, when a semifluid rubber raw material entering the flow channel 132 is divided to each material passing hole 171 under the guidance of the flow channel 132 and flows to the corresponding cavity 111 from the material passing hole 171, the semifluid rubber raw material fills the gap, and the semifluid rubber raw material in the cavity 111 is heated and cured by a heating component, so that a firewall sheath finished product 4 with a required structure is finally formed.

Referring to fig. 2, 5 and 6, the mold core 112 includes a core tube 1121 and an insert 1122, the cavity 111 includes a plug hole 1111 into which the core tube 1121 is inserted, the insert 1122 is inserted into an end of the plug hole 1111 to plug the end of the plug hole 1111, an insert groove 115 into which the insert 1122 is inserted is formed in the upper core plate 11, and an exhaust channel 113 communicated with the insert groove 115 is formed on an upper surface of the upper core plate 11 near each insert groove 115; when the sealing performance of the joint between the insert 1122 and the core tube 1121 is reduced, air is likely to remain at the joint between the insert 1122 and the nozzle of the core tube 1121, when the semi-fluid rubber raw material enters the gap between the cavity 111 and the mold core 112 and moves to the gap between the insertion hole 1111 and the core tube 1121, the semi-fluid rubber raw material may press the air in the gap between the insertion hole 1111 and the core tube 1121, so that the air is discharged from the gap between the insert 1122 and the insertion hole 1111 through the air discharge passage 113, and the air discharge passage 113 is used for temporarily accommodating the discharged air to ensure that the semi-fluid rubber raw material fills the gap between the insertion hole 1111 and the core tube 1121, thereby ensuring the curing quality of the semi-fluid rubber raw material at the gap between the insertion hole 1111 and the core tube 1121.

Referring to fig. 2 and 4, air is easily left in the cavity 111 before the semi-fluid rubber raw material is injected into the cavity 111, and after the semi-fluid rubber raw material is injected into the cavity 111, part of the left air cannot be discharged out of the cavity 111 in time and occupies part of the space in the cavity 111, so that the semi-fluid rubber raw material cannot fill the whole cavity 111, and the shape of a finished product finally cured and formed is defective; therefore, sealing ring grooves 114 are circumferentially formed in the upper surfaces of the upper core plate 11 and the lower core plate 12 close to the edges, rubber can be embedded in each sealing ring groove 114, so that the outer surface of the rubber on the upper core plate 11 abuts against the side wall of the heating plate 141 connected with the upper core plate 11, and the outer surface of the rubber on the lower core plate 12 abuts against the side wall of the upper core plate 11, thereby improving the sealing performance of the seams between the upper core plate 11 and the lower core plate 12, between the upper core plate 11 and the heating plate 141 connected with the upper core plate 11, reducing the amount of air left in the cavity 111, and preventing the air from entering the cavity 111.

Referring to fig. 3, 4 and 7, the air-extracting assembly 2 is also used for exhausting the air in the cavity 111 before the semi-fluid rubber raw material is injected into the cavity 111, and the air-extracting assembly 2 includes a horizontal air-extracting pipe 21, a plurality of longitudinal air-extracting pipes 22, a plurality of branch air-extracting pipes 23 communicated with each longitudinal air-extracting pipe 22, and an air-extracting pump 24 communicated with the end of the horizontal air-extracting pipe 21; the air inlet end of the air pump 24 is communicated with the end part of the transverse air exhaust pipe 21, and the other end of the transverse air exhaust pipe 21 is sealed; the two ends of the longitudinal air exhaust pipes 22 are sealed, in this embodiment 1, the number of the longitudinal air exhaust pipes 22 is 3, all the longitudinal air exhaust pipes 22 are uniformly communicated with the transverse air exhaust pipe 21 at intervals, and in this embodiment 1, each longitudinal air exhaust pipe 22 corresponds to 4 air exhaust branch pipes 23; the horizontal air exhaust pipe 21, the longitudinal air exhaust pipe 22 and the branch air exhaust pipes 23 are all embedded in the upper mold core plate 11, and one end of each branch air exhaust pipe 23 far away from the longitudinal air exhaust pipe 22 penetrates through the lower surface of the upper mold core plate 11.

Referring to fig. 7 and 8, the side walls of the lower core plate 12 facing the lower core plate 12 are provided with groove-shaped air exhaust channels 121, and the end parts of all the air exhaust branch pipes 23 are communicated with the air exhaust channels 121; the side wall of the lower mold insert 12 near each cavity 111 is provided with a plurality of air grooves 122, the air grooves 122 are communicated with the air exhaust channel 121, the depth of the air grooves 122 is smaller than that of the air exhaust channel 121, and the depth range of the air grooves 122 in this embodiment 1 can be 0.03-0.05mm, so as to finally communicate the air exhaust transverse tube 21 with all the cavities 111, and further exhaust the air in the cavities 111 through an air exhaust pump before injection molding.

Referring to fig. 8 and 9, the air grooves 122 may be detachably connected with the blocking blocks 123, the number of the blocking blocks 123 in each air groove 122 is not limited, and the thickness of the blocking blocks 123 may be smaller than the depth of the air grooves 122 or equal to the depth of the air grooves 122; when the thickness of the blocking block 123 is smaller than the depth of the air groove 122, the blocking block 123 can intercept the semi-fluid rubber raw material from entering the air groove 122 from the cavity 111, and when the thickness of the blocking block 123 is equal to the depth of the air groove 122, the outer surface of the blocking block 123 is attached to the lower surface of the upper core plate 11, so that the corresponding air groove 122 is in a blocking state, and the number of the communicated air grooves 122 can be controlled as required, so that the air in the cavity 111 is discharged from the communicated air grooves 122 in a concentrated manner.

Referring to fig. 2 and 4, the fireproof wall protection sleeve mold further comprises a stripping component 3, wherein the stripping component 3 is used for stripping the fireproof wall protection sleeve finished product 4 from the cavity 111 on the lower mold core plate 12 after the semi-fluid rubber raw material in the cavity 111 is cured and molded into the fireproof wall protection sleeve finished product 4, so that convenient stripping is realized; a cavity 19 is reserved between the bottom plate 16 and the lower mold core plate 12, and the stripping component 3 is positioned in the cavity 19; the stripping component 3 comprises a driving plate 31, a plurality of top rods 32 vertically welded on the side wall of the driving plate 31, a plurality of limiting rods 33 vertically welded on the side wall of the driving plate 31, and limiting springs 34 sleeved outside each limiting rod 33.

Referring to fig. 2 and 4, the ejector rods 32 and the limiting rods 33 are disposed on the side wall of the drive plate 31 facing the lower core plate 12, in this embodiment 1, each mold core 112 corresponds to one ejector rod 32, and the lower end of the mold core 112 penetrates through the cavity 111 of the lower core plate 12 and is attached to the upper end of the ejector rod 32; in an initial state, the driving plate 31 is attached to the upper surface of the bottom plate 16 under the action of self weight, and at the moment, the blocking rod 321 blocks the cavity 111 penetrated by the mold core 112 to prevent semi-fluid rubber raw material from overflowing out of the cavity 111 from the position where the mold core 112 penetrates through the cavity 111; when the material needs to be removed, the driving plate 31 is driven by an external force to move towards the direction close to the lower die core plate 12, so that the ejector rod 32 pushes the die core 112 towards the direction close to the lower die core plate 12, the die core 112 and the firewall sheath finished product 4 sleeved outside the die core 112 are pushed out of the die cavity 111, and the material removal is realized.

Referring to fig. 2 and 4, the limiting rod 33 penetrates through the heating plate 141 and the heat insulation plate 142 connected to the lower core plate 12, one end of the limiting spring 34 is attached to the outer surface of the driving plate 31, the other end is attached to the lower surface of the lower core plate 12, when the driving plate 31 is in the initial state, the limiting spring 34 is just not deformed, if the driving plate 31 moves towards the driving plate 31 towards the direction close to the lower core plate 12, the driving plate 31 will extrude the limiting spring 34, and accordingly, the driving plate 31 will receive the elastic force of the limiting spring 34, therefore, on one hand, the limiting spring 34 can prevent the driving plate 31 from moving randomly along the cavity 19 when the semi-fluid rubber raw material in the cavity 111 is not completely produced, so that the ejector rod 32 pushes the core 112 to extrude the semi-fluid rubber raw material in the cavity 111, and further influence the curing shape of the semi-fluid rubber raw material; on the other hand, the limiting spring 34 can also drive the driving plate 31 to rapidly return after the driving plate 31 moves towards the direction close to the lower die core plate 12.

The implementation principle of a firewall sheath mold in embodiment 1 of the application is as follows: the top plate 13, the transition plate 17, the heat insulation plate 142 on the upper layer, the heating plate 141 on the upper layer, the upper core plate 11, the lower core plate 12, the heating plate 141 on the lower layer, the heat insulation plate 142 on the lower layer and the bottom plate 16 are fixedly connected together from top to bottom through bolts, then the air pump is started, at this time, air in the cavity 111 passes through the air groove 122, the air exhaust channel 121, the air exhaust branch pipe 23, the air exhaust longitudinal pipe 22 and the air exhaust transverse pipe 21 in sequence, and is finally discharged from the air pump, after the air pump works for a specified time, the air pump is closed, then the injection part of the nozzle on the peripheral injection equipment is inserted into the communication port 151, at this time, the end face of the injection part of the nozzle is just tightly attached to the attachment face 152 of the inner wall of the communication port 151, the semifluid rubber raw material is injected into the communication port 151 through the nozzle and flows into the flow channel 132 through the injection port 131, and then flows into all the material through holes 171 under the guidance of the flow channel 132, in passing through material hole 171 again and flowing into die cavity 111, the semi-fluid rubber raw materials engorged the space of reserving between die cavity 111 and the mold core 112, heats mould kernel board 11 and lower mould kernel board 12 through heating element after that to make the semi-fluid rubber raw materials in die cavity 111 be heated and solidify gradually, finally solidify into prevent hot wall sheath finished product 4 with the complete unanimity of void structure shape, the hot wall sheath finished product 4 that generates cup joints in mold core 112 outside.

And finally, detaching the upper die core plate 11 from the upper part of the lower die core plate 12, detaching the die core 112 and the firewall sheath finished product 4 from the cavity 111 on the upper die core plate 11, connecting the driving plate 31 with an external cylinder driving end, so that the driving plate 31 is driven by the cylinder to move towards the direction close to the lower die core plate 12, and then the die core 112 is communicated with the firewall sheath finished product 4 through the ejector rod 32 to eject out the cavity 111 of the lower die core plate 12 together, thereby realizing material removal.

Example 2

Referring to fig. 10, embodiment 2 differs from embodiment 1 in that: the heating plates 141 and the heat insulation plates 142 are arranged in a one-to-one correspondence manner, the heat insulation plates 142 face the side walls of the heating plates 141 and are located at the edges of the heat insulation plates 142, heat insulation enclosing plates 144 are integrally formed along the circumferential direction of the heat insulation plates 142, the heat insulation enclosing plates 144 and the heat insulation plates 142 are jointly used for synthesizing the slots 145 for inserting the corresponding heating plates 141, the heating plates 141 are completely inserted into the corresponding slots 145, and the heating pipes 143 penetrate through the heat insulation enclosing plates 144.

The implementation principle of a firewall sheath mold in embodiment 2 of the application is as follows: the heat insulation surrounding plate 144 surrounds the circumferential sidewall of the edge of the heating plate 141, and the heat insulation plate 142 is attached to the sidewall of the heating plate 141 departing from the upper core plate 11 or the lower core plate, so that the heat generated by the heating plate 141 can be conducted to the upper core plate 11 or the lower core plate 12 in a concentrated manner, and the heat dissipation is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a prevent hot wall sheath mould which characterized in that: the injection molding device comprises an injection molding assembly (1), wherein the injection molding assembly (1) comprises an upper core plate (11), a lower core plate (12) and a heating element (14) for heating the upper core plate (11) and the lower core plate (12); a plurality of cavities (111) are jointly formed between the lower core plate (12) and the lower core plate (12), and a mold core (112) matched with the shape of the outer surface of the firewall sheath is arranged in each cavity (111); all the cavities (111) are communicated with a flow channel (132) for flowing of injection raw materials, and one end of the flow channel (132) far away from the cavities (111) is communicated with an injection inlet (131) for injecting the raw materials into each cavity (111); the runner (132) is also communicated with an air exhaust assembly (2) for exhausting all air in the cavity (111).

2. The firewall sheath mold of claim 1, wherein: injection moulding subassembly (1) is still including setting up in roof (13) of last mould benevolence board (11) top to and can dismantle position circle (15) of connecting on roof (13), intercommunication mouth (151) that are linked together with injection inlet (131) are seted up at position circle (15) middle part, intercommunication mouth (151) inner wall is provided with binding face (152) along its circumference, binding face (152) closely laminate with the face wall of the mouth injection portion that penetrates that is used for injecting semifluid rubber raw materials.

3. The firewall sheath mold of claim 2, wherein: the air extraction assembly (2) comprises a transverse air extraction pipe (21), longitudinal air extraction pipes (22) uniformly communicated with the transverse air extraction pipe (21) along the length direction of the transverse air extraction pipe (21), a plurality of air extraction branch pipes (23) communicated with each longitudinal air extraction pipe (22), and an air extraction pump (24) communicated with the end part of the transverse air extraction pipe (21); one end of the transverse air exhaust pipe (21) far away from the air exhaust pump (24) is closed, the side wall of the lower die core plate (12) facing the upper die core plate (11) is provided with an air exhaust channel (121), the outer surface of the lower die core plate (12) close to each die cavity (111) is provided with a plurality of air grooves (122) communicated with the die cavity (111), the air grooves (122) are communicated with the air exhaust channel (121), and all the air exhaust branch pipes (23) are communicated with the air exhaust channel (121).

4. The firewall sheath mold of claim 3, wherein: the inner part of the lower die core plate (12) close to the air groove (122) is detachably connected with a blocking block (123), and the thickness of the blocking block (123) is smaller than or equal to the groove depth of the air groove (122).

5. The firewall sheath mold of claim 4, wherein: and rubber inserted sealing ring grooves (114) are formed in the outer side walls of the upper mold core plate (11) and the lower mold core plate (12) along the circumferential direction of the upper mold core plate and the lower mold core plate.

6. The firewall sheath mold of claim 1, wherein: mold core (112) include core pipe (1121) and insert (1122) that set up with core pipe (1121) one-to-one, jack (1111) of establishing are inserted including supplying core pipe (1121) in cavity (111), jack (1111) are located on last mould benevolence board (11), insert (1122) are inserted and are located jack (1111) upper end, go up mould benevolence board (11) and all offer the inlay groove (115) that supply insert (1122) to insert near the inside of each insert (1122) department, it is provided with exhaust passage (113) that are linked together with inlay groove (115) to go up the lateral wall that mould benevolence board (11) are close to each inlay groove (115) department.

7. The firewall sheath mold of claim 1, wherein: the lower die core plate (12) is provided with bottom plate (16) below, be provided with between lower die core plate (12) and bottom plate (16) and be used for driving die core (112) to break away from taking off material subassembly (3) of die cavity (111), it includes drive plate (31) to take off material subassembly (3) to and a plurality of sets up in ejector pin (32) of drive plate (31) lateral wall, each die core (112) all correspond ejector pin (32), the laminating of ejector pin (32) upper end is in the die core (112) lower surface that corresponds, it has cavity (19) that supply drive plate (31) and ejector pin (32) to slide to reserve between lower die core plate (12) and bottom plate (16).

8. The firewall sheath mold of claim 7, wherein: take off material subassembly (3) still including set up perpendicularly in a plurality of gag lever post (33) of drive plate (31) lateral wall to and cup joint in the outside spacing spring (34) of each limiting plate, gag lever post (33) and spacing spring (34) are located one side that drive plate (31) located towards lower mould benevolence board (12), spacing spring (34) wherein one end is laminated in one side that lower mould benevolence board (12) located towards drive plate (31), spacing spring (34) other end is laminated in drive plate (31) lateral wall.

9. The firewall sheath mold of claim 1, wherein: the heating element (14) comprises heating plates (141) symmetrically arranged at the outer sides of the upper die core plate (11) and the lower die core plate (12), heat insulation plates (142) arranged corresponding to the heating plates (141) one by one, and a plurality of heating pipes (143) for generating heat; the heating plate (141) is attached to the side wall of the position where the upper die core plate (11) or the lower die core plate (12) deviates from each other, the heat insulation plate (142) is attached to the side, away from the cavity (111), of the corresponding heating plate (141), and the flow channel (132) penetrates through the heating plate (141) and the heat insulation plate (142); each heating plate (141) corresponds to a plurality of heating pipes (143), and the heating pipes (143) penetrate through the corresponding side walls of the heating plates (141).

10. The firewall sheath mold of claim 1, wherein: the heating element (14) comprises heating plates (141) symmetrically arranged on the outer side walls of the upper die core plate (11) and the lower die core plate (12), heat insulation plates (142) arranged corresponding to the heating plates (141) one by one, and a plurality of heating pipes (143) for generating heat; the utility model discloses a heat insulating core plate, including the heating plate (141), the lateral wall of department deviates from each other in upper die kernel board (11) or lower die kernel board (12) is laminated to hot plate (141), each the lateral wall that heat insulating board (142) are close to border department has thermal-insulated bounding wall (144) along its circumference integrated into one piece, thermal-insulated bounding wall (144) enclose jointly with corresponding heat insulating board (142) and supply corresponding hot plate (141) to insert slot (145) of establishing, hot plate (141) are inserted completely and are located corresponding slot (145), heating pipe (143) run through thermal-insulated bounding wall (144).

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