CN202685187U

CN202685187U - Mold for making hollow polyurethane foam product

Info

Publication number: CN202685187U
Application number: CN 201220368987
Authority: CN
Inventors: 赵生权
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-27
Filing date: 2012-07-27
Publication date: 2013-01-23
Anticipated expiration: 2022-07-27

Abstract

The utility model relates to a mold for making a hollow polyurethane foam product. The mold comprises a foaming mold upper cavity, a foaming mold lower cavity, an eggshell-shaped disposable core and a core fixing pin, wherein the foaming mold lower cavity is matched with the foaming mold upper cavity for use; the eggshell-shaped disposable core is arranged in a foaming mold which consists of the foaming mold upper cavity and the foaming mold lower cavity and is provided with an inner cavity; and the core fixing pin is arranged on the foaming mold upper cavity. According to the mold, the foaming is creatively completed by inlaying the hard eggshell-shaped disposable core which can bear all aeolotropic pressure into the polyurethane foaming mold and pouring blended slurry into the mold; the eggshell-shaped disposable core in a foaming product is smashed after the foaming product is taken out of the mold, and core fragments are taken out of a smaller opening to obtain the perfect hollow polyurethane foam product. The hollow polyurethane foam product produced by the mold can solve the problem of limitations in the aspects of product wall thickness and density control in the prior art.

Description

A kind of mould of making the hollow polyurethane foam products

Technical field

The utility model relates to a kind of mould of making the hollow polyurethane foam products.

Background technology

Can successfully make at present the method for hollow polyurethane foaming product and substantially only have the centrifugal foaming that utilizes the slush moulding mode, it is larger that other use the hollow polyurathamc product of hard core demoulding gained to extract the opening of core out because the ductility of polyurethane foamed material itself is limited to, be difficult to make the finished product of good appearance, although prepared hollow polyurethane foam products can solve the opening problem and slush moulding foams, but its all directions wall thickness and consistent in density all can't be precisely controlled, therefore are not used widely.If adopt the inflatable inner bag then can produce the more accurate hollow polyurethane foam products of the more small and dense degree of opening, but because the pressure that the polyurethane products foaming process produces has uncontrollable anisotropy, the inflatable inner bag will produce crumple in the larger direction of external pressure, the direction less at external pressure then produces expansion, so just caused the wall thickness of hollow polyurethane foam products also uncontrollable.

The utility model content

The utility model mainly is to solve the existing technical problem of prior art; A kind of mould of making the hollow polyurethane foam products is provided, make the hollow polyurethane foam products that wall thickness and density are controlled, opening is less, the capping that this series products also can add a same foam material is bonded in its opening part and obtains the more complete hollow polyurethane foam products of outward appearance with glue, even section packs into and uses after the inflatable bladder within it.

Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals:

A kind of mould of making the hollow polyurethane foam products is characterized in that: comprise the foaming mould epicoele, with the matching used foaming mould lower mode cavity of foaming mould epicoele, be arranged on the disposable core of egg-shell type in the foaming mould with an inner chamber that foaming mould epicoele and foaming mould lower mode cavity form and be arranged on core locking pin on the foaming mould epicoele.

The utility model is creationary by the disposable core of hard egg-shell type that can bear anisotropic pressure is embedded in the polyurethane blowing mold, finish foaming behind the slurry that the perfusion allotment mixes in mould, from mould, take out froth pulp and then smash the disposable core of egg-shell type in the product, and from less opening, take out the core fragment and obtain more perfect hollow polyurethane foam products, use the hollow polyurethane foam products of this Mold Making can solve the limitation of prior art aspect product wall thickness and density control.

At above-mentioned a kind of mould of making the hollow polyurethane foam products, described foaming mould upper cavity is provided with for the fixing pin holes of the disposable core of egg-shell type.

At above-mentioned a kind of mould of making the hollow polyurethane foam products, be provided with the boss of the disposable core of support egg-shell type in the foaming mould lower mode cavity.

At above-mentioned a kind of mould of making the hollow polyurethane foam products, the disposable core of egg-shell type is provided with for being beaten the boss that knocks that the opening part reserved from froth pulp after smashing takes out after the froth pulp moulding.

Need to prove, the foaming mould upper cavity is provided with for the fixing pin holes of core; Described foaming mould lower mode cavity is provided with the boss of support inner bag; The disposable core of described egg-shell type is a hollow shell of making according to the moulding of hollow foam product inwall, is provided with a boss that is used for being fixed in the foaming mould lower mode cavity at the housing outer wall, is provided with one with the boss relative direction and is used for the fixing blind hole of contact pin; Described core locking pin is the draw point that two sections diameters have notable difference, can be as short as the desired size of design and gets with common die thimble mill.

Therefore, the utlity model has following advantage: 1. reasonable in design, simple and practical; 2. can produce the accurate hollow polyurethane foam products of wall thickness and density, even can after this interiors of products is packed inflatable bladder into, use.

Description of drawings

Figure 1A is a kind of mould decomposing schematic representation of making the hollow polyurethane foam products.

Figure 1B is the sectional view of Figure 1A.

Fig. 2 A is a kind of polyurethane foam toy basket-playing stereogram of built-in inflatable bladder.

Fig. 2 B is the sectional view of Fig. 2 A.

Fig. 3 A is the stereogram of making the disposable core of egg-shell type that the foamed toy basketball need use.

Fig. 3 B is the sectional view of Fig. 3 A.

Fig. 4 A is the stereogram of making the disposable core lower mode cavity of egg-shell type.

Fig. 4 B makes the disposable core upper cavity of egg-shell type stereogram.

Fig. 5 A is the stereogram of making the required foaming mould lower mode cavity of basketball shape polyurethane foam toy.

Fig. 5 B is the stereogram of making the required foaming mould upper cavity of basketball shape polyurethane foam toy.

Fig. 6 is the schematic diagram of putting into the disposable core grouting behind shaft or drift lining of egg-shell type in the foaming mould lower mode cavity.

Fig. 7 is the schematic diagram that inserts the core locking pin behind the foaming mould matched moulds.

Fig. 8 is the schematic diagram of inwardly progressively carefully breaking the disposable core of egg-shell type from the opening part that basketball shape polyurethane foam toy is reserved into pieces.

Fig. 9 installs to basketball shape polyurethane foam toy opening part schematic diagram with the inflatable inner bag of rubber together with capping.

The specific embodiment

Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment:

The device that the present embodiment needs under the paper:

1. foaming mould that be used for to make foamed toy comprises foaming mould upper cavity 12 and foaming mould lower mode cavity 14, the disposable core 13 of egg-shell type, core locking pin 11.

2. a mould that is used for making the disposable core of egg-shell type comprises mould upper impression 42 and mould lower impressions 41, is provided with the groove and the pin holddown groove that process according to the disposable core sand moulding of egg-shell type in the described mould upper impression 42; Be provided with the groove and the pin holddown groove that process according to the disposable core sand moulding of egg-shell type in the described mould lower impressions 41; Described mould comprises two pins that are used for the disposable core pin holes of moulding egg-shell type.

The below is take a kind of basketball shape polyurethane foam high resilience toy as the concrete manufacturing process of example introduction.

In order to obtain the basketball shape polyurethane foam toy 1 among the accompanying drawing 2A, then need to make foaming mould up and down die

cavity

12,14, the disposable core 13 of egg-shell type and core locking pin 11 among the accompanying drawing 1A.And in order to make the disposable core 13 of egg-shell type, then need to make up and down die cavity 42,41 of the required mould of the disposable core of egg-shell type among accompanying drawing 4A, the 4B.

1, use first the corrosion-resistant and rigidity of lightweight metal material or polytetrafluoroethylene (PTFE) or polyformaldehyde etc. preferably macromolecular material produce up and down die cavity 42,41 of the required mould of the disposable core of making egg-shell type among accompanying drawing 4A, the 4B in the machining mode, the molded dimension of die cavity is that the inwall moulding of the basketball shape polyurethane foam toy hollow foam material 21 among Fig. 2 B is amplified to 102%.

2, even spraying one deck wax mould oil in the mold cavity 41,42 of making the disposable core of egg-shell type, the prescription of this mould oil can be with reference to following proportionings:

Paraffin 5%

Butanone solvent 80%

Cyclohexanone solvent 15%

3, make the slurry of making the disposable core of egg-shell type with following raw material and proportioning:

Talcum powder or high-quality calcium carbonate or calcium hydroxide powder 30%

High fluidity epoxy resin 50%

Curing agent 20%

Its operating procedure is: first with solid powder material and the abundant mixing and stirring of epoxy resin, add again curing agent after rapid stirring even.

4, slurry deployed in the step 3 is poured into rapidly in the die cavity 41,42 that mould oil parched, quick all directions rotary die immediately behind the matched moulds makes slurry evenly be attached to curing molding behind the inwall of mould to utilize centrifugal force.

5, die sinking and from mould, take out the disposable core 13 of egg-shell type make after question response is finished.

6, according to moulding and the size of basketball shape polyurethane foam toy, polyurethane blowing mold among form acquisition accompanying drawing 5A, the 5B of use machining or casting is die

cavity

12,14 up and down, the structure of the disposable core of assembly egg-shell type must be set in the polyurethane blowing mold, make the disposable core 13 of egg-shell type in mould, be in relatively-stationary position always, match with hollow polyurethane foam products all directions wall thickness and the design size of guaranteeing made.

7, respectively in the polyurethane blowing

mold die cavity

12,14 in accompanying drawing 5A, 5B and disposable core 13 surface sprayings of egg-shell type among accompanying drawing 3A, the 3B be suitable for wax or the silicone oil mould oil that polyurethane foamed material uses, and it is air-dry or dry.

8, the disposable core 13 of the egg-shell type that first mould oil has been parched is put into the assembly position of foaming mould lower mode cavity 14 reservations of accompanying drawing 5A, then by shown in the accompanying drawing 6 slurry 61 for preparing being injected foaming mould lower mode cavity 14, press behind the matched moulds shown in the accompanying drawing 7 and to insert core locking pin 11 and all directions rotary die immediately, be uniformly distributed in the mold cavity and finish the polymerization foamable reaction to guarantee slurry.

9, die sinking and take out basketball shape polyurethane foam toy hollow foam material 21 together with the disposable core 13 of its embedded egg-shell type.

10, press shown in the accompanying drawing 8, the opening part that uses homemade miniature adz-eye hammer 81 to reserve from basketball shape polyurethane foam toy hollow foam material 21 is inwardly progressively carefully broken the disposable core 13 of egg-shell type into pieces, and the core fragment is taken out from here.

11, use normal foam production technique to produce the basketball shape polyurethane foam toy opening capping 22 shown in the accompanying drawing 9.

12, by the basketball shape polyurethane foam toy hollow foam material 21 of will after the inflatable inner bag 23 of the rubber of unaerated state is bonding with capping 22 usefulness glue, packing into shown in the accompanying drawing 9, again that capping 22 and basketball shape polyurethane foam hollow foam material 21 usefulness glue are bonding.

13, after glue parches, use to the inflator of basketball inflation and inflate to rubber liner from the valve of capping, can obtain so the complete basketball shape polyurethane foam toy 1 shown in the accompanying drawing 2A.

Use the basketball shape polyurethane foam toy of the present embodiment made, its external sense of touch is the same with the conventional polyurethanes foamed toy to have abundant pliability, but it freely lands resilience and can compare favourably with basketball with real sports, weight is then gently many than unidimensional pure polyurethane high-elastic toy ball, therefore can be to the injury of impacting property of children.

Specific embodiment described herein only is to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Although this paper has more used the term of the industries such as some moulds, machinery, chemical industry, and be not precluded within the possibility of using other term on the appellations such as identical part, raw material, material, technical process.Using these terms only is in order to describe more easily and explain essence of the present utility model; They are construed to any additional restriction all is contrary with the utility model spirit.

Claims

1. mould of making the hollow polyurethane foam products is characterized in that: comprise foaming mould epicoele (12), with the matching used foaming mould lower mode cavity of foaming mould epicoele (12) (14), be arranged on the interior disposable core of egg-shell type (13) of the foaming mould with an inner chamber that foaming mould epicoele (12) and foaming mould lower mode cavity (14) form and be arranged on core locking pin (11) on the foaming mould epicoele (12).

2. a kind of mould of making the hollow polyurethane foam products according to claim 1 is characterized in that: described foaming mould epicoele (12) is provided with for the fixing pin holes of the disposable core of egg-shell type (13).

3. a kind of mould of making the hollow polyurethane foam products according to claim 1 is characterized in that: the boss that is provided with the disposable core of support egg-shell type (13) in the foaming mould lower mode cavity (14).

4. a kind of mould of making the hollow polyurethane foam products according to claim 1 is characterized in that: the disposable core of egg-shell type (13) is provided with for being beaten the boss that knocks that the opening part reserved from froth pulp after smashing takes out after the froth pulp moulding.