CN111283950A

CN111283950A - Novel foaming forming die

Info

Publication number: CN111283950A
Application number: CN201811486529.3A
Authority: CN
Inventors: 顾志元
Original assignee: 顾志元
Priority date: 2018-12-06
Filing date: 2018-12-06
Publication date: 2020-06-16

Abstract

The invention relates to a novel foaming forming die, which consists of a male die, a female die, a demoulding mechanism and a cooling device, wherein a male die core and a female die core are formed by bending and welding 2-6 mm stainless steel plates, and circular air through holes with the diameter of 0.3-1.2 mm are vertically arranged on the male die core and the female die core; because the male die core and the female die core are provided with the circular air holes, compared with the die core with stainless steel with the same thickness and provided with the air through grooves, the strength is greatly improved, and the deformation of the air through grooves at the original bending part is avoided; due to the adoption of the air through holes, the phenomenon that galling is easy to occur when the product is demolded when an air through groove structure is adopted is avoided, the surface quality of the product is improved, and the holes are not easy to block after long-term use; because the air chamber I and the air chamber II are respectively provided with the cooling device, the cooling of the mold core can be accelerated, and the structure is reasonable, the use is convenient, and the cooling device has great practical and popularization values.

Description

Novel foaming forming die

Technical Field

The invention relates to a mould for producing a foamed plastic product, in particular to a novel foaming forming mould.

Background

Through searching related patent documents, a foaming forming mold with the same structure as the foaming forming mold has not been searched at present. The existing foamed plastic foaming forming die is generally formed by machining cast aluminum, the foamed plastic particles are required to be melted and bonded by heating after entering a die cavity, air holes are usually formed in the die core, air plugs are embedded in the air holes, steam is introduced into the die cavity through the air plugs to heat the die core, so that the foamed plastic particles are cured, the embedded air plugs are easy to loosen and block after being used for a period of time, pits of the formed product are uneven, the die drawing phenomenon is serious, the quality of the product is seriously influenced, the air plugs are required to be frequently replaced, and the replacement process is complicated; because the strength of the aluminum material is low, the air plug needs to be embedded on the mold core, the air plug is firmly embedded so that the mold core is not deformed, the wall of the mold core is generally made thicker, foamed plastic particles need to be fused in the product molding process, and the temperature in the mold core and the mold cavity needs to reach a certain temperature, so that a large amount of steam is needed to enter in the product molding process, the heat conduction time is longer, the cooling time after the product molding is longer, and the production efficiency is low; although the mold core that has the foaming mould adopts the stainless steel to make, it has the air channel to open on the mold core, can solve the quick curing of foamed plastic particle, and the quick refrigerated problem after the product shaping, but a plurality of air channels on the model can lead to the fact the influence to grinding apparatus intensity, position yielding between the air channel, shape requirement to the foaming material is higher, the product surface is easy to be napped after the shaping, the easy deformation of air channel of corner blocks up after bending, thereby cause product surface defect and make the product scrap, so it is necessary to design a neotype foaming forming die, with the manufacturing cost who reduces the mould, improve the shaping speed and the drawing of patterns speed of goods, reduce the steam quantity, satisfy the needs of actual production, reach and reduce the consumption, improve economic benefits.

Disclosure of Invention

The invention aims to provide a novel foaming forming die which is simple in structure, stable in performance, high in production efficiency, high in surface quality of a formed product and capable of effectively reducing steam consumption.

The invention is technically characterized in that: the novel foaming forming die is designed to be a novel foaming forming die consisting of a male die, a female die, a demoulding mechanism and a cooling device on the basis of considering the convenience in processing and use, wherein the demoulding mechanism is arranged on the female die, the male die consists of a male die outer sleeve and a male die core, the male die outer sleeve and the male die core form an air chamber I, and the male die outer sleeve is respectively provided with an air inlet, an air outlet and a water inlet; the female die consists of a female die outer sleeve and a female die core, the female die outer sleeve and the female die core form an air chamber II, the female die outer sleeve is respectively provided with a feed inlet, an air outlet and a water inlet, and cooling devices are arranged in the air chamber I and the air chamber II; the male die core and the female die core are formed by bending and welding 2mm-6mm stainless steel plates, and circular air through holes with the diameter of 0.3mm-1.2mm are vertically arranged on the male die core and the female die core; the demoulding mechanism is a spring ejector rod type ejection mechanism.

The circular air holes in the male die core and the female die core are uniformly distributed, arranged in character patterns or arranged in figures, and the arrangement pattern is set according to the surface requirement of the product.

The demoulding mechanism consists of an ejector rod, a spring, a guide sleeve, an adjusting nut and a cake pushing device, wherein one end of the ejector rod is provided with the adjusting nut, and the other end of the ejector rod is provided with the cake pushing device; the cake pushing surface and the female die core are on the same plane; the spring is sleeved on the ejector rod; the guide sleeve is embedded on the outer sleeve of the female die; the spring is used for driving the cake pushing device to reset by the ejector rod after the product is ejected; the adjusting nut is used for adjusting the elastic force of the spring.

The cooling device consists of a water pipe and a nozzle, and the nozzle is arranged on the water pipe; the spraying direction of the nozzles is the surface of the mold core, and the set number of the nozzles is set according to the size of a product.

When the device is used, under the action of a forming machine, the female die core and the male die core are mutually embedded together to form a forming cavity, a material gun fills foaming particles into the forming cavity, steam is introduced into the male die and the female die respectively at the moment, the steam quickly enters the forming cavity through the circular air penetrating hole of the male die core and the circular air penetrating hole of the female die core, after the certain temperature is reached, the foaming particles in the whole forming cavity are melted and softened, expanded and foamed to fill the whole forming cavity, cooling water is introduced into the air chamber I and the air chamber II through the water pipe of the cooling device, the cooling water sprays water to the die cores through the nozzles to cool the die cores, after the die cores are cooled to the proper temperature, the cooling water in the air chamber I and the air chamber II is pumped out through the air outlet, the die is opened, and then the product is separated from the die.

The invention has the advantages that: because the male die core and the female die core are made of stainless steel, compared with the existing die core cast by adopting aluminum, the thickness of the wall of the die core is greatly reduced, the weight of the whole die is reduced, the heat transfer speed is improved, the penetrating time of steam is reduced, and the curing speed of foaming particles is accelerated, so that the forming speed of a product is improved, the using amount of the steam is reduced, and meanwhile, the cooling time of the product after forming is also shortened; because the male die core and the female die core are provided with the circular air holes, compared with the die core with stainless steel with the same thickness and provided with the air through grooves, the strength is greatly improved, and the deformation of the air through grooves at the original bending part is avoided; due to the adoption of the air through holes, the phenomenon that galling is easy to occur when the product is demolded when an air through groove structure is adopted is avoided, the surface quality of the product is improved, and the holes are not easy to block after long-term use; because the air chamber I and the air chamber II are respectively provided with the cooling device, the cooling of the mold core can be accelerated, and the structure is reasonable, the use is convenient, and the cooling device has great practical and popularization values.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural diagram of a novel foam molding mold in an open state;

FIG. 2 is a schematic diagram of a partial enlarged structure of a male die of the novel foam molding die of the invention;

fig. 3 is a partially enlarged schematic view of fig. 1.

Detailed Description

Referring to the attached

drawings

1, 2 and 3, the novel foam forming die disclosed by the invention comprises a male die 1, a female die 2, a demoulding mechanism 3 and a cooling device 4, wherein the demoulding mechanism 3 is arranged on the female die 2, the male die 1 comprises a male die sleeve 11 and a male die core 12, the male die sleeve 11 and the male die core 12 form an air chamber I1 a, and the male die sleeve 11 is respectively provided with an air inlet 13, an air outlet 14 and a water inlet 15; the female die 2 consists of a female die outer sleeve 21 and a female die core 22, the female die outer sleeve 21 and the female die core 22 form an air chamber II 2a, the female die outer sleeve 21 is respectively provided with a feed inlet 23, an air inlet 24, an air outlet 25 and a water inlet 26, and cooling devices 4 are distributed in the air chamber I1 a and the air chamber II 2 a; the male die core 12 and the female die core 22 are formed by bending and welding stainless steel plates with the diameter of 2mm-6mm, and circular air through holes with the diameter of 0.3mm-1.2mm are vertically arranged on the male die core 12 and the female die core 22; the demoulding mechanism 3 is a spring ejector rod type ejection mechanism; the circular air holes on the male die core 12 and the female die core 22 are uniformly distributed, arranged in character patterns or arranged in figures, and the arrangement pattern is set according to the surface requirement of the product; the demoulding mechanism 3 consists of a top rod 31, a spring 32, a guide sleeve 33, an adjusting nut 34 and a push cake 35, wherein one end of the top rod 31 is provided with the adjusting nut 34, and the other end is provided with the push cake 35; the push surface of the push cake 35 and the female die core 22 are on the same plane; the spring 32 is sleeved on the ejector rod 31; the guide sleeve 33 is embedded on the female die outer sleeve 21; the spring 32 is used for driving the push cake 35 to reset by the ejector rod 31 after the product is ejected; the adjusting nut 34 is used for adjusting the elastic force of the spring 32; the cooling device 4 consists of a water pipe 41 and a nozzle 42, wherein the nozzle 42 is arranged on the water pipe 41; the ejection direction of the nozzles 42 is the core surface, and the set number of the nozzles 42 is set according to the product size.

Claims

1. A novel foaming forming die comprises a male die (1), a female die (2), a demolding mechanism (3) and a cooling device (4), wherein the demolding mechanism (3) is arranged on the female die (2), the male die (1) comprises a male die outer sleeve (11) and a male die core (12), the male die outer sleeve (11) and the male die core (12) form an air chamber I (1 a), and the male die outer sleeve (11) is respectively provided with an air inlet (13), an air outlet (14) and a water inlet (15); die (2) constitute by die overcoat (21), die mold core (22), die overcoat (21) and die mold core (22) constitute air chamber II (2 a), are equipped with feed inlet (23), air inlet (24), gas outlet (25), water inlet (26) on die overcoat (21) respectively, its characterized in that: cooling devices (4) are arranged in the air chamber I (1 a) and the air chamber II (2 a); the male die core (12) and the female die core (22) are formed by bending and welding stainless steel plates with the diameter of 2mm-6mm, and circular air through holes with the diameter of 0.3mm-1.2mm are vertically arranged on the male die core (12) and the female die core (22); the demoulding mechanism (3) is a spring ejector rod type ejection mechanism.

2. The novel foam molding die according to claim 1, characterized in that: the circular air holes in the male die core (12) and the female die core (22) are uniformly distributed, arranged in a word pattern or arranged in a figure, and the arrangement pattern is set according to the surface requirement of the product.

3. The novel foam molding die according to claim 1, characterized in that: the demolding mechanism (3) consists of an ejector rod (31), a spring (32), a guide sleeve (33), an adjusting nut (34) and a push cake (35), wherein one end of the ejector rod (31) is provided with the adjusting nut (34), and the other end of the ejector rod is provided with the push cake (35); the push-out surface of the push cake (35) and the female die core (22) are on the same plane; the spring (32) is sleeved on the ejector rod (31); the guide sleeve (33) is embedded on the concave die outer sleeve (21); the spring (32) is used for driving the push cake (35) to reset by the ejector rod (31) after the product is ejected; the adjusting nut (34) is used for adjusting the elastic force of the spring (32).

4. The novel foam molding die according to claim 1, characterized in that: the cooling device (4) consists of a water pipe (41) and a nozzle (42), and the nozzle (42) is arranged on the water pipe (41); the spray direction of the nozzles (42) is the surface of the mold core, and the set number of the nozzles (42) is set according to the size of the product.